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HYBRID COMMUNICATION SYSTEM (E.G., OPTICAL AND RF)

Subclass of:

398 - Optical communications

Patent class list (only not empty are listed)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
398116000 Including specific optical interface 84
Entries
DocumentTitleDate
20110176811ALL FIBER TOWED ARRAY - A system and method for an acoustic sensor array of a bundle of N different length optical fiber sensors. A coherent or noncoherent light source is input to each fiber for transmission along the length of the fiber. The light signal is reflected back at the fiber end point, and the resulting reflected light is diverted to an optical receiver so that perturbations of intensity and/or phase may be extracted.07-21-2011
20100150566Augmenting Passive Optical Networks - Passive optical networks have optical budget loss limitations that affect the ability of a Service Provider to serve a limited number of clients over a limited range. The deployment of passive optical networks is constrained by potential physical rights of way issues. A method and system for augmenting communication links of a passive optical network are disclosed which utilize radio frequency communication enabling an increase in the number of clients on the network as well as increasing the reach or range of the network while potentially eliminating physical rights of way issues.06-17-2010
20100150565Method and apparatus for transmitting/receiving signals in a microwave system - This invention discloses a method and an apparatus for transmitting/receiving signals in a microwave system, and pertains to the field of communications. The transmitting method comprises receiving and modulating a transmission signal transmitted via an optical fiber; processing the modulated transmission signal to generate RF signal; and separating the RF signal to be transmitted from a signal received via an antenna, and transmitting the separated RF signal via the antenna. The receiving method comprises separating a signal received via an antenna from a signal to be transmitted; processing the received signal after being separated to generate IF signal; demodulating the generated IF signal; and transmitting the received signal after being demodulated via an optical fiber. The transmitting/receiving apparatus comprises an optical fiber signal interface, a signal reception module, a modulation module, an IF-RF transmission module, a duplexer, a control module and a power interface. Use of the optical fiber to transmit the transmission signal and the received signal according to the present invention makes it possible for application of large capacity microwave and also greatly saves production cost.06-17-2010
20100150564COMMUNICATIONS NETWORK - The present invention provides a hybrid communications network, in which a customer may be connected to a copper access network or an optical fibre access network by a network node. By providing power from a network terminal, a customer causes the node to be connected to the optical fibre access network; if power is lost or the network terminal disconnected then the node will connect to the copper access network.06-17-2010
20100021176Apparatus and Method for Near-Field Communication - A communication device is disclosed having optical and near-field communication capability. The device includes an optical transceiver circuit fabricated on an integrated circuit die and configured to transmit and receive far field signals. A near field transceiver circuit is also fabricated on the integrated circuit die and is configured to transmit and receive near-field electro-magnetic signals. Control circuitry is provided to selectively enable the optical transceiver circuit and the near field transceiver circuit responsive to an external control signal.01-28-2010
20080260389Method And A System For Optimizing Radio Network Layer To Implement The Network Interconnection, And A Method For Interconnection Between The Radio Network And The Wired Network - A method for optimizing a radio network layer to implement a network interconnection is provided. A radio network controller is divided into radio access network servers and wireless adapters configured in a base station. The wireless adapters are adapted to process related radio interface protocols, and are connected to an optical access network via an adaptation function. The radio access network servers and a core network are respectively connected to optical network units to implement the interconnection between an optical network and a radio communication network. Therefore, the single-point failure is effectively prevented, the flexibility and extensibility are improved, it is convenient for networking, and the network coverage is enlarged. It is suitable for the service development and radio access applications in the future, and facilitates the combination with the wired network.10-23-2008
20080260388TIME DIVISION DUPLEXING REMOTE STATION HAVING LOW-NOISE AMPLIFIER SHARED FOR UPLINK AND DOWNLINK OPERATIONS AND WIRED RELAY METHOD USING THE SAME - A wired relay method for using a remote station and an apparatus thereof for a Radio over Fiber (RoF) wired relay system supporting a Time Division Duplexing (TDD) wireless communication service, which shares an Low-Noise Amplifier (LNA) for both uplink and downlink operations. The remote station includes a block for dividing each of a downlink optical signal carrying service data and an optical signal carrying transmission/reception control information of the RoF wired relay system, which are input from a base station, a gain controller for separating an uplink Radio Frequency (RF) signal input from an antenna or a portion of a downlink RF signal output from a High-Power Amplifier (HPA) and for monitoring the strength of the input and output RF signals in order to control a gain of the LNA. A converter mutually converts an optical signal and an RF signal, an amplifier amplifies the converted RF signal, and an RF signal flow controller automatically controlls uplink and downlink transmission paths of the amplified RF signal according to a transmission/reception status of the RoF wired relay system.10-23-2008
20100080564Optical phase locked loop - A single sideband modulator uses a radio-frequency signal output by a voltage controlled oscillator to modulate a reference optical signal output by a local light source, thereby obtaining several sideband signals, and combines the sideband signals into a single reproduced optical signal. The optical coupler couples the reproduced optical signal with a received optical signal to generate an optical beat signal, from which a photoelectric transducer and loop filter generate a control voltage for the voltage controlled oscillator. These components operate as an optical phase locked loop that efficiently locks the reproduced optical signal in frequency and phase with the received optical signal by using the energy of all sidebands of the reference optical signal. The phase locked loop is useful for coherent detection of the received optical signal.04-01-2010
20130077977Method and module for processing a request for transmitting a radio signal in an ROF system - A method and apparatus for processing a request to transmit a radio signal emitted by a radio terminal to a radio management module. The radio management module authorizes the radio terminal to emit the radio signal to a radio module associated with the radio terminal. The radio module has optical processing elements connected to one end of an optical link via which the radio signal modulated on the optical carrier is to be transmitted. The method includes the following steps, applied by an optical management module connected to the radio management module: generating an activation request to activate the optical processing elements of the radio module associated with the terminal by transmission-related parameters included in the transmission request, the transmission-related parameters being transmitted to the optical management module by the radio management module, and emitting, to the associated radio module, the activation request to activate the optical processing elements.03-28-2013
20130034358INTEGRATED BASE STATION FOR MANAGING MULTIPLE SIMPLIFIED RADIO ACCESS POINTS - There is disclosed an integrated base station (BS) communicatively combined with two or more simplified radio access points (APs). The integrated BS is configured to receive a signal from a backbone/backhaul network and transmits the received signal to the simplified radio APs, route a signal to at least one of the two or more simplified radio APs, and communicate with the two or more simplified radio APs through wireline communication.02-07-2013
20120183299SYSTEM AND METHOD FOR DISTORTION COMPENSATION IN RESPONSE TO FREQUENCY DETECTION - A distortion compensation circuit with frequency detection may be used with one or more non-linear elements, such as a laser, to compensate for frequency-dependent distortion generated by the non-linear element(s), for example, in broadband multichannel RF applications. Embodiments of the distortion compensation circuit may include a frequency detector circuit that detects changes in frequency loading conditions in the distortion compensation circuit such that distortion compensation may be adjusted to compensate for distortion under different frequency loading conditions. In a multichannel RF system with multiple channel operation modes, for example, the frequency detector circuit may detect changes in the frequency loading condition as a result of changing operation modes.07-19-2012
20100104292DISPLAY APPARATUS AND CONTROL METHOD THEREOF - A display apparatus which supports wireless/optical communication is provided. The display apparatus includes a wireless/optical interface which performs wireless/optical communication with at least one first external apparatus, a power supply unit which supplies power to the wireless/optical interface, a user interface through which a device is selected, and a controller which controls power supply from the power supply unit to the wireless/optical interface according to user selection on the user interface.04-29-2010
20100142963Methods and Devices for detection of a first signal superimposed on a second signal - The invention relates to a method and a device for detecting at least one first input signal superimposed on at least one second signal, the method comprising the steps of providing said at least one first input signal superimposed on at least one second signal to at least one half-wave rectifier; transforming, in said at least one half-wave rectifier, said at least one first input signal superimposed on at least one second signal into a half-wave rectified signal; providing said half-wave rectified signal to an envelope detector; and transforming, in said envelope detector, said half-wave rectified signal into an envelope signal and wherein the at least one half-wave rectifier comprises at least one optoelectronic device. In this way, a simpler and cheaper method and/or device are provided for e.g. detecting a transmitted information signal superimposed on a high frequency carrier signal.06-10-2010
20130089336APPARATUS FOR COMMUNICATING A PLURALITY OF ANTENNA SIGNALS AT DIFFERENT OPTICAL WAVELENGTHS - A remote radio unit is disclosed that includes antenna interfaces, RF receivers, and a digital-to-optical converter. The antenna interfaces each receive an antenna signal from a different antenna. The RF receivers downconvert the antenna signals to baseband signals, and convert the baseband signals to digital streams of user data. The digital-to-optical converter converts each of the digital streams of user data to optical signals having different optical wavelengths for output to an optical fiber for communication to a radio equipment control unit. Related radio base stations and network control points are disclosed.04-11-2013
20090304389Semiconductor apparatuses having optical connections between memory controller and memory module - Semiconductor apparatuses having optical connections between a memory controller and a memory module are provided. A semiconductor apparatus includes a memory controller, at least one socket configured to receive a memory module, and a first optical-electrical module. A second optical-electrical module is mounted in the socket and optically coupled to the first optical-electrical module via at least one optical channel.12-10-2009
20130058658METHOD AND COMMUNICATION ARRANGEMENT FOR ESTABLISHING A COMMUNICATION LINK - A communication link can be established by way of a radio interface between a first mobile communication facility and a second mobile or permanently stationary communication facility. In at least one embodiment, an item of identification information is made available by one of the communication facilities as an optical signal for receipt at the cited sensor; the communication facility, to which the sensor receiving the optical signal belongs, accepts the identification information and transfers the accepted identification information as a request to set up a communication link via the radio interface with the communication facility, which makes or has made the optical signal available. The requested communication facility implements a comparison between the accepted identification information and its own identification information and permits the setup of the communication link as a function of the comparison result.03-07-2013
20130058657System and Method for Photonic Compressive Sampling - A photonic compressive sampling system includes a photonic link with at least one electro-optic modulator that modulates a continuous wave optical energy with both an electrical analog signal and a pseudorandom bit sequence signal. A photodetector receives the modulated optical energy from the electro-optic modulator, and an electrical digitizer digitizes the output from the photodetector. The system enables signal recovery beyond the Nyquist limit of the digitizer. The signal being recovered has a sparse (low-dimensional) representation and the digitized samples are incoherent with this representation. An all-photonic system can faithfully recover a 1 GHz harmonic signal even when digitizing at 500 MS/s, well below the Nyquist rate.03-07-2013
20110038637INTERFACING INTERNET PROTOCOL-BASED WIRELESS DEVICES WITH NETWORKS - A communication system, comprising a wireless communication device including a plurality of antennas communicatively coupled with a communication component, the communication component including a processor, a transmitter, and a receiver, the communication component configured to transmit a first data stream by simultaneously transmitting a first plurality of signal streams using the plurality of antennas, the first plurality of signal streams collectively representing the first data stream, the communication component configured to receive a second data stream by simultaneously receiving a second plurality of signal streams using the plurality of antennas and generating the second data stream from the second plurality of signal streams.02-17-2011
20110058815Oceanic communications system - A system of buoys is connected by vertical cables to submarine fiber optic communications cable on the ocean floor or in cases where no submarine fiber optic cable is present, the buoys will use satellite communication. The buoys are aligned on the surface of the ocean, underneath heavily traveled oceanic air routes to provide platforms for radios. The satellite or cable connection to the buoys enables high bandwidth communications backhaul from the buoy to the internet or public switched telephone network. The high bandwidth buoys provide a platform to put different radio systems, enabling a substantially uninterrupted radio connection to high altitude aircraft as they transit oceanic airspace.03-10-2011
20110013912HEADER ASSEMBLY FOR COMMUNICATIONS MODULE - In one example, a header assembly for use in a communication device has a base that includes a plurality of single ports through which a corresponding plurality of leads extends. The leads are retained in their respective single ports by a retainer material. Additionally, the base includes one or more plural ports through which two or more leads extend.01-20-2011
20130183043APPARATUS FOR EMPLOYING LOW OHMIC ALLOY CONDUCTORS AND METHOD FOR SIMPLIFYING CURRENT DRAIN DATA RETRIEVAL - Apparatus and method for measuring current drain and reporting power consumption using current transformer with primary windings made of low ohmic alloy, enabling the use of the secondary coil to power the sensing and reporting circuits eliminating the power wasted by AC-DC power adaptors used for the current sensors. The saving is substantial as the current sensors will not drain a current when the AC outlets are disconnected from a load or when the load is switched off. The apparatus using low ohmic alloy is extended to the structuring of terminals, including power pins, power sockets and combinations to provide a low ohmic sensing elements in AC plugs, outlets, adaptors and extension cables with multi outlets, dissipating the heat from the sensing elements by the plugs and the larger metal heat dissipation.07-18-2013
20120189313LED LIGHT BROAD BAND OVER POWER LINE COMMUNICATION SYSTEM - An LED light and communication system is in communication with a broadband over power line communications system. The LED light and communication system includes at least one optical transceiver. The optical transceiver includes a light support having a plurality of light emitting diodes and at least one photodetector attached thereto, and a processor. The processor is in communication with the light emitting diodes and the at least one photodetector. The processor is constructed and arranged to generate a communication signal.07-26-2012
20120224859PHOTONIC IMPULSE GENERATOR - Various embodiments are directed to a photonic impulse generator comprising a periodically chirped photonic source a single-frequency photonic source, a photodetector, an optical coupler, and a filter. The optical coupler may be positioned to couple an output of the single-frequency photonic source to an output of the periodically chirped photonic source, resulting in a combined photonic signal. The photodetector may be positioned to receive the combined photonic signal and generate a combined electrical signal. The filter may be in electrical communication with an output of the photodetector to receive the combined electrical signal.09-06-2012
20130064547INTERFACING INTERNET PROTOCOL-BASED WIRELESS DEVICES WITH NETWORKS - A communication system, comprising a wireless communication device including a plurality of antennas communicatively coupled with a communication component, the communication component including a processor, a transmitter, and a receiver, the communication component configured to transmit a first data stream by simultaneously transmitting a first plurality of signal streams using the plurality of antennas, the first plurality of signal streams collectively representing the first data stream, the communication component configured to receive a second data stream by simultaneously receiving a second plurality of signal streams using the plurality of antennas and generating the second data stream from the second plurality of signal streams.03-14-2013
20130064549INGRESS-MITIGATED CABLE COMMUNICATION SYSTEMS AND METHODS HAVING INCREASED UPSTREAM CAPACITY FOR SUPPORTING VOICE AND/OR DATA SERVICES - Cable communication systems and methods to provide voice and/or data services to subscriber premises in one or more neighborhood nodes via an ingress-mitigated cable plant that conveys upstream information over an upstream path bandwidth. One or more upstream radio frequency (RF) signals have a carrier frequency of between approximately 5 MHz and 19.6 MHz and are modulated using quadrature amplitude modulation (QAM) with voice and/or data information constituting at least some of the upstream information. An example RF signal defines a channel having an average channel power, and a highest value for an average noise power between 5 MHz and 19.6 MHz in the upstream path bandwidth of a given neighborhood node, as measured over at least a 24 hour period, is at least 25 decibels (dB) below the average channel power and/or less than 20 decibels (dB) above a noise floor associated with the neighborhood node.03-14-2013
20130064548METHODS, SYSTEMS, AND DEVICES FOR WIRELESSLY STREAMING DATA TO AN OPTICAL DISC - Provided are devices, systems, and methods for wirelessly streaming digital data to an optical disc. Embodiments of the device are designed to enable real time, wireless streaming of data via wireless communication. A user can wirelessly stream data from an electronic device capable of wireless communication, to an optical disc containing a memory, a power supply, a processor, a transceiver, a charging device, and an optical modulator. An optical disc reader can then read the electronic data on the optical disc to process the electronic data in real time.03-14-2013
20090103924FOURTH HARMONIC GENERATING SYSTEM USING OPTICAL DOUBLE SIDE-BAND SUPPRESSED CARRIER MODULATOR - The present invention is to provide an optical modulating system for generating a signal of a frequency (f04-23-2009
20090232508COMMUNICATION SYSTEM PROVIDING HYBRID OPTICAL/WIRELESS COMMUNICATIONS AND RELATED METHODS - A communication system includes at least one optical-wireless device coupled to a longitudinal side of an optical fiber. The optical-wireless device may include an optical fiber power unit for converting optical power into electrical power, and a wireless communication unit electrically powered by the optical fiber power unit. The optical-wireless device may include a substrate mounting the optical fiber power unit and the wireless communication unit to the longitudinal side of the optical fiber. The wireless communication unit may include a radio frequency transmitter, and a signal optical grating coupling the transmitter to the longitudinal side of the optical fiber. The radio frequency transmitter in some embodiments may include an ultra-wideband transmitter. A dipole antenna may also be provided including first and second portions extending in opposite directions along the longitudinal side of the optical fiber.09-17-2009
20090232507DIGITAL RADIO FREQUENCY TRANCEIVER SYSTEM AND METHOD - A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog amplifier and an electro-optical converter. The ground unit has ultrafast data converters and digital frequency translators, as well as signal linearizers, to compensate for nonlinear distortion in the amplifiers and optical links in both directions. In one embodiment of the invention, at least one of the digital data converters, frequency translators, and linearizers includes superconducting elements mounted on a cryocooler.09-17-2009
20090047023Data communications system - A base station is provided for communicating data to a mobile terminal unit by means of at least one antenna unit, wherein the at least one antenna unit is linked to the base station by means of at least one optical fibre and the at least one antenna unit is operable to communicate wirelessly with the mobile terminal unit. The base station comprises an optical transmitter for transmitting modulated data signals to the at least one antenna unit for wireless transmission, an optical receiver for receiving modulated data signals forwarded by the at least one antenna unit and a demodulator for demodulating received modulated data signals. The optical transmitter comprises a first optical modulator arranged to modulate an optical carrier with a radio frequency oscillator signal to generate an optical oscillator signal, a second optical modulator, coupled optically to the first optical modulator, operable to modulate the optical oscillator signal with an input data signal of a predetermined frequency to generate a downlink optical data signal and an optical output for directing the downlink optical data signal to the at least one antenna unit by means of the at least one optical fibre.02-19-2009
20100028011DIGITAL CLOCK AND DATA RECOVERY SCHEME - A method and apparatus providing clock and data recovery within an optical receiver using three CMA FIR filters with different group delays where filter coefficients are adapted to provide for a filter exhibiting a group delay of one sample period from which symbols for further processing are provided.02-04-2010
20110026931RADIO BASE STATION APPARATUS - A shared transmission/reception apparatus (OF-TRX) includes: a transmission/reception processor section (TRX-B) for a mobile communication system B configured to perform frequency conversion processing on a transmission baseband signal for the mobile communication system B outputted from a signal converter section (E/O), and to output a transmission radio frequency signal for the mobile communication system B; a power level adjuster section (VA) configured to adjust a power level of a transmission radio frequency signal for a mobile communication system A inputted from a transmission/reception processor section (TRX-A) for the mobile communication system A; a combiner section (COM) configured to generate a transmission radio frequency signal by combining the transmission radio frequency signal for the mobile communication system A outputted from the power level adjuster section (VA) and the transmission radio frequency signal for the mobile communication system B outputted from the transmission/reception processor section (TRX-B) for the mobile communication system B; and a common amplifier section (PA) configured to amplify a power level of the transmission radio frequency signal outputted from the combiner section (COM) at a predetermined amplification rate, and to output the resultant signal.02-03-2011
20090196620STORAGE DEVICE, STORAGE DEVICE ARRAY, AND DATA PROCESSING SYSTEM - A storage device includes a storage section, a first control section, a communication section, a second control section and a wireless transmission and reception section. The storage section stores data. The first control section controls reading and writing the data from and into the storage section. The communication section transmits and receives the data to and from a higher-level device via a first transmission line. The second control section transmits and receives the data to and from the first control section and the communication section. The wireless transmission and reception section is provided to face a predetermined direction, and wirelessly transmits and receives data to and from another storage device provided in the predetermined direction under control of the second control section.08-06-2009
20100329689RF REMOTE-CONTROL DEVICE CAPABLE OF REMOTELY CONTROLLING A PLURALITY OF PIECES OF IR EQUIPMENT AND REMOTE CONTROL METHOD THEREOF - Disclosed are an RF remote-control device is capable of remotely controlling a plurality of pieces of IR equipment and an RF remote control method. A remote-control device upgrades IR remote-control equipment for RF remote control. A “unified” control method remotely-controls a plurality of pieces of IR equipment using one remote controller. An RF remote controller includes a key device, an MCU 12-30-2010
20090196621FIBER-OPTIC TO USB ETHERNET CONVERTER - A fiber-optic to USB Ethernet converter includes fiber-optic jacks for connecting to optical cables; a USB connecting end for plugging into a USB connector on a computer device; a USB-Ethernet converting module for converting USB serial electric signal format into Ethernet electric signal format and Ethernet electric signal format into USB serial electric signal format; an optical-electric signal converting circuit for converting the Ethernet electric signal format received from the USB-Ethernet converting module into an optical signal for sending out via one optical cable, and converting an optical signal received from one optical cable into the Ethernet electric signal format for sending back to the USB-Ethernet converting module; and a power supply detecting and converting module connected to first and fourth pins in the USB connecting end to acquire and convert +5V DC into 5V or 3.3V for use by the optical-electric signal converting circuit and the USB-Ethernet converting module.08-06-2009
20090310972CIRCUIT CARD SUBASSEMBLIES FOR INTERCONNECTION OF ELECTRONIC COMPONENTS - A communication system is provided. The communication system includes a serialized radio frequency transceiver module and at least one radio frequency module. The serialized radio frequency transceiver module includes a plurality of optical-module connectors, and a remote serialized radio frequency interface including a plurality of high speed connectors. Each of the at least one radio frequency module includes an interface configured to be coupled to the remote serialized radio frequency interface of the serialized radio frequency transceiver module to pass and receive data signals, and a remote digital-analog radio transceiver input interface coupled to the interface. The remote digital-analog radio transceiver input interface is configured to pass data signals to and from the at least one radio frequency module.12-17-2009
20120099868HYBRID COMMUNICATION APPARATUS FOR HIGH-RATE DATA TRANSMISSION BETWEEN MOVING AND/OR STATIONARY PLATFORMS - The invention relates to a hybrid communication apparatus for high-rate data transmission between moving and/or stationary platforms, comprising at least one transmission and reception device, wherein the transmission engineering used is radio-frequency engineering. The invention provides for light waves to be used for the data transmission either as an alternative or in addition. The transmission and reception devices (04-26-2012
20110318014NOISE SUPPRESSION IN AN OPTICAL APPARATUS - Apparatus for processing an optical signal carrying symbols. Modulation conversion means converts the optical signal from a first format, wherein each symbol has a unique nominal phase, to a second format, wherein each symbol has a unique combination of nominal phase and nominal amplitude. The modulation conversion means includes a signal splitter for splitting the optical input signal into two optical partial signals, which are directed to respective optical paths. Delay elements cause a mutual temporal difference between the two optical partial signals, which are processed in at least one non-linear regenerator having at least two ports and a gain which depends on the combined signal power directed to the at least two ports. The apparatus directs the optical partial signals from the modulation conversion means to an internal or external photo detector stage in the second format.12-29-2011
20120002971POLARIZATION-TRACKING DEVICE HAVING A WAVEGUIDE-GRATING COUPLER - A polarization-tracking device having a waveguide grating that serves as a polarization splitter and an optical fiber-to-waveguide coupler. The polarization-tracking device also has an optical mixing circuit configured to receive light from the waveguide grating and a control circuit for tuning the optical mixing circuit. Based on an optical feedback signal received from the optical mixing circuit, the control circuit can configure the latter to produce two optical output signals that represent, e.g., two independently modulated polarization components of a polarization-multiplexed optical input signal or two principal states of polarization of an optical input signal that has been subjected to polarization-mode dispersion. Certain embodiments of the polarization-tracking device lend themselves to convenient implementation in a photonic integrated circuit and are configurable to provide endless polarization control.01-05-2012
20090263137PHOTONIC RF DOWN-CONVERTER BASED ON OPTOMECHANICAL OSCILLATION - An all optical radio frequency converter. The invention relates to a microtoroid optomechanical oscillator that can provide a local oscillation frequency and a mixing functionality. The microtoroid optomechanical oscillator can be fabricated from a silica-on-silicon wafer. When an input optical signal having an optical carrier frequency carrying a modulated RF signal representing information is applied to the microtoroid optomechanical oscillator, a signal including the baseband information modulated on the optical carrier is provided as output. The output signal can be detected with a photodetector. Information carried by the optical signal can be recorded and/or displayed to a user. Injection locking of the microtoroid optomechanical oscillator can be accomplished by providing a signal of suitable frequency. The frequency and the phase of operation of the microtoroid optomechanical oscillator can be locked to the respective frequency and phase of the injected locking signal.10-22-2009
20100183314INLINE OPTOELECTRONIC CONVERTER AND ASSOCIATED METHODS - An inline optoelectronic converter configured to convert electrical signals to optical signals aid to convert optical signals to electrical signals. The converter is external to the avionic computer and connected to the avionic computer at a location spaced apart from the avionic computer. The converter is configured to be integrated into an existing wiring bundle of the avionic computer. Also disclosed is a method of retrofitting an avionic computer by connecting an optoelectronic converter to the computer. The method comprises connecting the converter to an existing wiring bundle of the avionic computer at a location spaced apart from the avionic computer.07-22-2010
20110286747OPTICAL TRANSMITTER - A method of generating an information-bearing optical signal (11-24-2011
20110008053QUANTIFYING LINK QUALITY IN AN OPTOELECTRONIC MODULE - In one example embodiment, an optoelectronic module includes an optical receiver and a post-amplifier. The optical receiver is configured to receive an optical signal and generate an electrical data signal corresponding to the optical signal. The post-amplifier is electrically connected to the optical receiver and is configured to amplify the electrical data signal. The optoelectronic module further includes means for quantifying a quality of the optical signal from which the amplified electrical data signal is derived.01-13-2011
20090220244Demodulation of Phase Modulated Fibre-Optic Sensor System Signals - Demodulation apparatus for demodulating phase-modulated signals comprises a quadrature signal generator (QSG) for generating in-phase (I) and quadrature-phase (Q) signals in response to an unmodulated input signal. The QSG provides fast frequency tracking of the input signal and excludes any high-frequency content the input signal.09-03-2009
20080317472Power Line Communication System Using Hybrid-Fiber Coaxial and Communication Device Used in the System - A communication equipment which is utilized in a power line communication (PLC) system utilizing a hybrid fiber coax (HFC) which includes a PLC optical network unit, a PLC trunk bridge amplifier, a PLC distribution amplifier, and a PLC coupling device. In this instance, the PLC optical network unit does not require a PLC protocol conversion of an Ethernet signal by a cable modem and a PLC modem in each subscriber location, and enables a PLC communication between the each subscriber location and a communication terminal utilizing a PLC Ethernet signal as is, by receiving an optical signal from an optical transmitter via an optical fiber, converting the optical signal into the PLC Ethernet signal corresponding to a predetermined PLC protocol, and transmitting the PLC Ethernet signal to at least one subscriber location via a coaxial cable.12-25-2008
20080247758Position determination system using radio and laser in combination - A combined radio and laser positioning system comprising: a network of ground based radio communication devices, a laser transmitter configured to generate at least one laser beam, and at least one user unit. Each user unit comprises a radio receiver configured to receive at least one ranging radio signal transmitted by at least one ground based radio communication device, a laser detector configured to receive at least one laser beam generated by the laser transmitter, and a processor configured to convert a set of data including: {a set of data transmitted by at least one ranging radio signal, and a set of data transmitted by said at least one laser beam} into position coordinates of the user unit, wherein a set of vertical coordinates of the user unit is obtained with a laser-assisted (LA) accuracy.10-09-2008
20120033976OPTICAL COMMUNICATION MODULE - Provided is an optical communication module including: a surface emitting element configured to convert an electrical signal into an optical signal and emit the optical signal; a lens provided at a predetermined distance from the surface emitting element in a direction along the center of an optical axis of the surface emitting element so that an emission angle from the surface emitting element is 30° or lower, the lens configured to output a first optical signal and a second optical signal; a first polarizing plate provided on the center of an optical axis of the lens, and configured to polarize the first optical signal into a specific direction and pass the first optical signal there through; and a second polarizing plate provided on the center of another optical axis of the lens and adjacently to the first polarizing plate, and configured to polarize the second optical signal at a polarization angle different from that of the first optical signal by approximately 90° and pass the second optical signal there through.02-09-2012
20090290880Dispersion Compensation Circuitry and System for Analog Video Transmission With Direct Modulated Laser - An improved precompensation circuit includes a greatly improved differentiator in the dispersion precompensation path, a preprocessor in the dispersion precompensation path for reducing f2−f1 type Composite Second Order (CSO) distortion, and a broadband phase shifter for compensating undesired vector interaction between the laser predistortion and dispersion compensation.11-26-2009
20100080563MAGNETIC CONNECTOR WITH OPTICAL SIGNAL PATH - Circuits, apparatus, and methods that provide a connector system that can supply both power and data to a mobile computing or other type of device using a single connection. Further examples also provide a power and data adapter that can provide power and data to a mobile computing device using a single cable. Further examples provide an easy disengagement when a cable connected to the connector is pulled. One such example provides a magnetic connector that uncouples without binding when its cord is pulled. Another example prevents power from being provided at a connector insert until the connector insert is placed in a connector receptacle.04-01-2010
20090169214UNIFIED OPTICAL CONNECTOR ARCHITECTURE - A system, device, and method are disclosed. In one embodiment the system includes an optical link and a peripheral device optically coupled to the optical link. The system also includes a host controller, such as a graphics, network, or I/O controller. The system also includes a unified optical connector port, which is optically coupled to the optical link and electrically coupled to the first host controller. The port has a wavelength allocation unit that can allocate an optical wavelength for an optical signal that is utilized to communicate with the peripheral device. The port also includes an electrical-to-optical transmission unit capable of converting an electrical signal, received from the host controller, to the optical signal that was allocated at the first optical wavelength. The electrical-to-optical transmission unit is also capable of transmitting one or more data packets within the first optical signal to the peripheral device across the optical link.07-02-2009
20100278538MILLIMETER WAVE WIRELESS COMMUNICATION SYSTEM - A wireless communication system adapted to transmit data between two locations, for example between a plurality of processors and memory. Digitally coded millimeter waves can be used to transfer data between antenna arrays. A global optical clock can provide network coherence, frequency self-tracking, and a local oscillator signal for data digital symbol coding/decoding and symbol up-down conversion to/from the millimeter wavelength carrier.11-04-2010
20100061732SMALL FORM FACTOR PLUGGABLE TRANSCEIVER MODULE - The present invention relates to small form factor pluggable (SFP) transceiver modules. The SFP transceiver module of the present invention comprises a cage corresponding to SFP dimensions, at least one coaxial connector for receiving and/or transmitting an electrical signal, at least one processing unit for processing a received signal, and a host connector for receiving and/or transmitting a processed signal.03-11-2010
20080240721OPTICAL RECEIVER, RECEPTION CONTROL METHOD AND RECEPTION CONTROL PROGRAM - An exemplary aspect of the present invention is an optical receiver which is used in an optical transmission system, and which receives an optical signal and converts the optical signal into an electrical signal, the optical receiver comprising a controller, and a delay interferometer, wherein the controller sends, to the delay interferometer, delay information corresponding to a modulation scheme with which the optical signal is modulated, the modulation scheme being any one of an intensity modulation scheme and a phase modulation scheme and the delay interferometer separates the optical signal and causes a delay in one of the separated signals by use of the delay information, thereafter causes an interference between the separated signals, and thereby outputs two optical signals including different interference levels.10-02-2008
20080292319OPTICAL-ELECTRICAL HYBRID INTEGRATED CIRCUIT - An operating unit performs a prescribed operation and includes a standby-state-signal generating unit that generates a standby state signal for switching between a standby state and an operation state of the operating unit in a first part of the operating unit. An optical-signal transmitting unit converts an electric signal, which is a result of the operation in a second part of the operating unit, into an optical signal, transmits the optical signal to a third part of the operating unit, and then converts the optical signal into the electric signal. A power-supply control unit controls a supply of the electric power to the operating unit and a supply of the electric power to the optical-signal transmitting unit by a power supply unit in response to the standby state signal.11-27-2008
20080310846FREQUENCY MODULATED BURST MODE TRANSMITTER - The present invention is directed towards a frequency modulated burst mode optical transmitter and systems and methods related thereto. Reverse electrical signals are used to frequency modulate a carrier signal. A carrier detect circuit checks for the presence of a subcarrier signal in received reverse electrical signals. When a subcarrier signal is detected, a laser is turned on and the frequency modulated carrier signal is used to intensity modulate the laser to provide an optical signal. In the absence of a subcarrier signal, the laser is turned off and no optical signals are transmitted. By operating in a burst mode, resources are conserved as optical signals are transmitted only when content-carrying reverse electrical signals are received. A delay circuit may be included to prevent loss of any signal information12-18-2008
20080240722COMMUNICATIONS DEVICE - A transmission device that includes: a radio signal transmission processing section that transmits a radio carrier wave overlaid with transmitting information after being modulated by pulse position modulation; an optical signal transmission processing section that transmits an optical carrier wave overlaid with the transmitting information after being modulated by the pulse position modulation; and a baseband processing section that modulates the transmitting information in accordance with the pulse position modulation of shared use with the radio signal transmission processing section and the optical signal transmission processing section.10-02-2008
20120033977OPTICAL RELAYING R-TYPE AND GR-TYPE RECEIVER SYSTEM - Some embodiments of R/GR type fire alarm control system according to the invention comprises a plurality of detectors/transmitters for issuing alarm signals, a plurality of fire safety equipments for operating under control signals, a plurality of optical repeaters and an R/GR type fire alarm control panel. The optical repeaters are connected to each other in daisy-chain and connected to the plurality of the detectors/transmitters and the fire safety equipments, optically transmits the alarm signals upwardly and optically transmits the control signals downwardly, and are capable of electrically transacting the alarm signals with respect to the detectors/transmitters and the control signals with respect to the fire safety equipments. The R/GR type fire alarm control panel receives the alarm signals from one of the optical repeaters and transmits the control signals to one of the optical repeaters.02-09-2012
20100135668COMPACT WIDE-ANGLE PIXELLATED ACTIVE OPTICAL LINK - A system, method, and optical communication device are disclosed. The system can include a plurality of optically coupled nodes forming an optical communication network. Each node may include an array of pixel elements, each pixel element having an optical detector and an active optical source. The pixel array may be disposed in a backplane of a lens that is configured to map incoming optical signals to pixel locations in the backplane according to their respective angles of incidence and to minimize a deviation at each pixel location between incoming optical signals arriving at the optical detector and emissions from the optical source. The node may include a processor and memory. The processor can register senders in the optical network at locations in the pixel array and can generate routing information by which to route communications from the registered senders to other pixel elements for transmission to their respective destinations.06-03-2010
20090162070OPTICAL TRANSMISSION MODULE - An optical transmission module includes a first transmission line for transmitting an electric signal, a resistance element used as a termination point, a second transmission line connected to the resistance element, and a surface ground pattern forming a coplanar line through the first and second transmission lines on a surface of a substrate. A modulator-integrated light-emitting element for outputting output light from an output end face is connected to the surface ground pattern. An electrode pad for modulator driving is located near the output end face on a top face of the modulator-integrated light-emitting element. The first transmission line and the electrode pad are connected by a first wire. The electrode pad and the second transmission line are connected by a second wire. A first notch portion is located in the substrate at a point of intersection between a propagation path of output light of the modulator integrated light-emitting element and a first side face of the substrate. The first and second transmission lines and the electrode pad are aligned.06-25-2009
20090028570OPTICAL-TO-ELECTRICAL CONVERTER AND ANALOG-TO-DIGITAL CONVERTER THEREOF - An analog-to-digital converter (ADC) for converting an optical signal into an electrical signal is disclosed. The ADC includes a detection module, a first P-type metal oxide semiconductor (PMOS) transistor, a first N-type metal oxide semiconductor (NMOS) transistor, a first switch unit, and an output module. The first PMOS transistor and the first NMOS transistor form an inverter. The first switch unit is disposed between the input terminal and the output terminal of the inverter and is turned on/off according to a first control signal. The output module is coupled to the output terminal of the inverter for counting the time that an input voltage is greater than a reference voltage and generating a digital signal.01-29-2009
20090116843Device for Transmitting and Receiving Data and Corresponding Operating Method - A passive device includes an optical-to-electrical converter unit, an electrical-to-optical converter unit, an antenna and a polymer modulator.05-07-2009
20120070153Noise Detector in a Light Bulb - Noise may be received through a microphone included in a lighting apparatus. The noise may then be analyzed to determine if a human being may have been the source of the noise, and a message sent over a network alerting other devices that a human-caused noise was detected.03-22-2012
20120070152ROOM ASSOCIATION DEVICE CONVEYING SECTOR DATA FOR IN-ROOM POSITION AND FACING DETERMINATIONS - A processor can determine a relative position within a room of a person wearing a force-on-force device based exclusively upon sensed optical signals detected by optical sensors connected to the force-on-force device. Each of the sensed optical signals is geographically focused within a spatially constrained zone. Each sensed optical signal can further include digitally encoded data indicating an optical source that emitted the sensed optical signal and a spatially constrained zone of the sensed optical signal. The relative position can be determined based on determining a grid within the room within which the person is located. The grid can be defined by overlapping ones of the spatially constrained zones of the sensed optical signals.03-22-2012
20090080896COMMISSIONING TOOL, COMMISSIONING SYSTEM AND METHOD OF COMMISSIONING A NUMBER OF WIRELESS NODES - A commissioning tool includes a laser pointer structured to reflect light from a wireless lighting ballast, a directive antenna, a ranging module structured to determine distance to the ballast, and a housing. The pointer, antenna and ranging module are each mounted in the same common orientation with respect to the housing. A 3D gyroscope determines azimuth angle and elevation angle of the same common orientation. A GPS and dead reckoning system determines the global position of the tool. A wireless transceiver cooperates with the antenna. A processor cooperates with the transceiver to receive a unique device identifier from the ballast. The processor receives the distance, the azimuth and elevation angles, and the global position of the tool, and controls the light source. The processor may output the distance, the azimuth and elevation angles, the global position of the tool and the unique device identifier to another processor.03-26-2009
20090097855Hybrid wireless/wired RoF transponder and hybrid RoF communication system using same - A radio-over-fiber (RoF) hybrid wired/wireless transponder is disclosed that is configured to provide both wireless and wired communication between a hybrid head-end and one or more client devices. The hybrid transponder includes optical-to-electrical (O/E) and electrical-to-optical (E/O) conversion capability and is configured to frequency multiplex/demultiplex electrical “wired” signals and electrical “wireless” signals. The electrical wireless signals are wirelessly communicated to the client device(s) via a multiple-input/multiple-output (MIMO) antenna system within a cellular coverage area. The electrical wired signals are communicated to the client device(s) via a wireline cable that plugs into a wireline cable port on the transponder. The hybrid RoF system includes a hybrid head-end capable of transmitting and receiving wired and wireless optical signals, and an optical fiber cable that is optically coupled to the hybrid head-end and to at least one hybrid transponder. Drop-down transponder configurations that allow for easy wired and wireless connectivity between the client device(s) to the transponder(s) are also disclosed.04-16-2009
20110142451Optoelectronic Switch Transmitter Using Millimeter Wavelength - An optoelectronic switch using millimeter wavelength (MMW) is provided. An r voltage pulse is applied to a device under test (DUT) for switching the photo-generated MMW power The DUT is operated under reverse bias. An optical light source with modulated MMW envelop is injected on to DUT for MMW power generation. Thus, based on change of the reverse bias, speed is violently changed and the MMW optoelectronic switch is thus obtained.06-16-2011
20090208220Systems and methods for generating RF pulses with reduced phase error - Systems and methods for generating RF pulses that have a reduced phase error are disclosed. The systems are optical based and thus are highly linear, so that phase errors, including jitter, are significantly reduced as compared to electrical RF pulse generation systems and methods. The optical-based RF pulse generation methods includes generating laser light, imparting an envelope modulation to the laser light, imparting a carrier modulation to the laser light, and detecting the envelope-modulated and carrier-modulated light to form the electrical RF pulse. The electrical RF pulse can then be carried by a cable to an external device.08-20-2009
20090238573COMMUNICATION SYSTEM AND METHOD WITH GAIN CONTROL FOR SIGNALS FROM DISTRIBUTED ANTENNAS - An apparatus for gain control in a communication system is disclosed. The apparatus includes means for receiving at least one aggregate communications signal, the at least one aggregate communications signal comprising a summation of distributed communications signals, means for detecting at least a sample of a signal level of the at least one aggregate communications signal, and means for attenuating the signal level of the at least one aggregate communications signal based on the signal level sample.09-24-2009
20120195597LOCATION VERIFICATION IN QUANTUM COMMUNICATIONS - Methods and systems for verifying the location of a communication transceiver using quantum communication channels are described. Communications transceivers at different known locations are used having a secure channel therebetween to verify the location of the communication transceiver at a location to be verified using entangled particles transmitted using the quantum communication channels.08-02-2012
20110236025SUB-RATE SAMPLING IN COHERENT OPTICAL RECEIVERS - Apparatus and methods for optimizing the interplay between the sampling rate of an ADC of a receiver system and a bandwidth of analog anti-aliasing filters are described. The described technology can be used to mitigate aliasing for receiver systems that operate at fractional sampling rates by optimizing a bandwidth of optical and electrical filters included in the receiver systems.09-29-2011
20090116844Electrical-dispersion compensating apparatus, optical receiving apparatus, and optical receiving method - An optical receiving apparatus branches an optical signal, photo-electric-converts the branched signals, and compensates dispersion in each of the converted electrical signals. Electrical-dispersion compensators respectively compensate the dispersion in the electrical signals using a transversal filter having plural taps. A dispersion control unit controls the dispersion compensation amount for each of the electrical signals by adjusting tap coefficients of the transversal filter. A delay control unit controls the difference in the delay time of the electrical signals by adjusting the tap coefficients adjusted by the dispersion control unit. An identifying circuit identifies data in the optical signal based on each of the electrical signals that have been subjected to dispersion compensation by each of the electrical-dispersion compensators.05-07-2009
20100189443HIGH SPEED SIGNAL GENERATOR - A high-speed signal generator. A digital signal processing (DSP) block generates a set of N (where N is an integer and N≧2) parallel digital sub-band signals, each digital sub-band signal having frequency components within a spectral range between 0 Hz and ±Fs/2, where Fs is a sample rate of the digital sub-band signals. A respective Digital-to-Analog Converter (DAC) processes each digital sub-band signal to generate a corresponding analog sub-band signal, each DAC having a sample rate of Fs/2. A combiner combines the analog sub-band signals to generate an output analog signal having frequency components within a spectral range between 0 Hz and ±NFs/2.07-29-2010
20100178058RFID SYSTEMS AND METHODS FOR OPTICAL FIBER NETWORK DEPLOYMENT AND MAINTENANCE - An optical-fiber-network (OFN) radio-frequency identification (RFID) system for deploying and/or maintaining an OFN. The system includes a plurality of OFN components, and at least one RFID tag that includes RFID tag data that has at least one property of the OFN component associated with the RFID tag. The RFID tag data is written to and read from the RFID tags prior, during or after deploying the OFN components. An OFN-component-data database unit is used to store and process the RFID tag data. This allows for different maps of the OFN to be made, such as an inventory map and a maintenance map. The OFN-RFID system allows for automated operations and management of OFN components by service personnel, and provides for faster and more accurate OFN system deployment and maintenance.07-15-2010
20100166429CUSTOMER PREMISES OPTICAL NETWORK UNIT - There is provided a customer premises optical network unit (ONU) capable of reading management signals and of outputting data through an external node by using I07-01-2010
20100221015METHOD AND SYSTEM FOR SIGNAL PROCESSING BY MODULATION OF AN OPTICAL SIGNAL WITH A MULTICHANNEL RADIO FREQUENCY SIGNAL - A signal processing system is disclosed having a detector for detecting an RF signal, wherein the detector has plural detection channels. A modulator modulates an optical signal with the detected RF signal and a processor processes the modulated optical signal to determine an azimuth or an elevation of the detected RF signal.09-02-2010
20100239265CARRIER CURRENT COMMUNICATION SYSTEM WITH INFRARED RECEIVER - Embodiments of a method and apparatus are described to transmit a data signal from a power supply unit, over existing direct current (DC) power transmission lines, to a residential gateway which includes an infrared (IR) receiver designed to receive optical signals. In one embodiment, the IR receiver is configured to receive a carrier current communication signal from the power supply unit over a pair of copper wires coupled to the IR receiver. The carrier current communication signals may be encoded by a transmission encoding logic circuit using pulse position modulation techniques. The received carrier current communication signals may be demodulated and decoded to reproduce an input data stream.09-23-2010
20120141131OPTICAL RECEIVING APPARATUS AND METHOD - An optical receiving apparatus compensates degradation of an optical signal received, based a division operation using the intensity of the optical signal. A receiving unit outputs a first electrical signal corresponding to the phase of the optical signal and a second electrical signal corresponding to the intensity of the optical signal. An analog first dividing unit and a second dividing unit divide the first electrical signal by the second electrical signal. A first ADC and a second ADC convert the divided electrical signal to a digital signal. An identifying unit identifies data of the optical signal based on calculation using the digital signal.06-07-2012
20090074420MEASURING APPARATUS, TRANSFER CIRCUIT, AND MEASURING METHOD - There is provided a measuring apparatus that measures a characteristic of a transfer circuit transmitting a signal. The transfer circuit includes an electrical signal sending section that transmits a sending signal, a current to light converting section that converts the sending signal into an optical signal, an optical signal transmitting section that transmits the optical signal, a photo-electric converting circuit that converts the optical signal into an electrical signal, a level measuring section that compares the intensity of the electrical signal output from the photo-electric converting circuit and a predetermined reference level to detect a data value of the electrical signal, an electrical signal receiving section that detects a data value of the electrical signal, and a timing controlling section that controls latch timing at which the electrical signal receiving section detects the data value of the electrical signal. The measuring apparatus includes a comparing section that compares the data value of the electrical signal received by the electrical signal receiving section with a predetermined expected value, a setting controlling section that sequentially changes the reference level and the latch timing, and a result storing section that stores a comparison result by the comparing section for each the reference level and the latch timing.03-19-2009
20110044692All-Optical AM-To-FM Up-Conversion for Radio-Over-Fiber - A laser source is configured for all-optical AM-FM up-conversion. In one exemplary embodiment, an amplitude modulated (AM) optical input signal containing a baseband signal at a sub-microwave frequency, is injected into the laser source. The amplitude of the AM optical input signal and the optical carrier frequency are adjusted so as to place the laser source in a period-one dynamical state characterized by a transitioning of the laser source from a free-running optical frequency to at least two optical frequencies having a separation distance equal to a period-one microwave frequency. As a result of the period-one dynamical state, a frequency modulated (FM) optical output signal containing the baseband signal carried at the period-one microwave frequency, is propagated out of the laser source. The period-one microwave frequency is operative as a sub-carrier signal.02-24-2011
20110176812OPTICAL COMMUNICATION CARD AND COMMUNICATION DEVICE - Multiplexing-technology based large-capacity transmission requires the installation of many types of interface card. In addition, supporting a redundant configuration for preventing data communication from being interrupted requires the devices and cards more than double those required for the production system. An optical communication card includes multiple optical signal transmission/reception units, main signal processing units corresponding to the optical signal transmission/reception units and required for a multiplexed system, and a connection selection unit that can switch among multiple optical transmission lines, and each of the main signal processing units includes multiple function units and a function selection unit.07-21-2011
20090110404CONNECTOR SYSTEM WITH ELECTRICAL CONNECTION AND INFRARED COUPLING AND METHOD - An electrical connector system provides both electrically conductive connection and infrared coupling, and includes at least one electrically conductive member adapted to provide electrically conductive connection to another electrically conductive member, an infrared member adapted to provide infrared member coupling with another infrared member, and wherein the at least one electrically conductive member and the infrared member being held in positional relation to each other to be positioned with respect to a further electrical connector for electrically conductive connection and infrared coupling with respect thereto. A method of connecting electrical signals uses a pair of electrical connectors, each having an electrically conductive connection portion and an infrared coupling portion to provide for both electrically conductive connection and infrared coupling between the electrical connectors. The invention may be used in portable electronic equipment, including mobile phones, for example.04-30-2009
20080310848Combined optical and electrical transmission assembly and module - A combined optical and electrical transmission assembly includes a combined optical, electrical and power cable having an optical fiber, electrical wiring and a power line combined therein or a combined optical and electrical cable having an optical fiber and electrical wiring combined therein, and a combined optical and electrical transmission module that includes an electrical-to-optical conversion unit having a laser for converting electrical signals to optical signals and a driving IC for driving the laser, and/or an optical-to-electrical conversion unit having a photodiode for converting optical signals to electrical signals and an amplification IC for amplifying electrical signals from the photodiode. The combined optical and electrical transmission module is connected to both ends of the combined optical, electrical and power cable or the combined optical and electrical cable. The combined optical and electrical transmission modules are each connected with an electrical cable for transmitting electrical signals with an external device and a power cable for transmitting power. The length of the power cable is shorter than that of the electrical cable.12-18-2008
20090034979SYSTEMS AND METHODS FOR BROADBAND TRANSMISSION OF SIGNALS - Systems and methods which facilitate broadband transmission of signals using a delivery point tuning technique to provide a extended frequency passive optical network (EF-PON) are shown. Embodiments provide an extended frequency optical transition node (EF-OTN) at each of a plurality of delivery points to provide a frequency translation interface between equipment disposed at the delivery point locations and a network utilizing transmission bandwidth which is incompatible with that equipment. The foregoing frequency conversion is preferably transparent to the equipment receiving the network transmissions. Embodiments utilize a single wideband tuner for providing frequency conversion with respect to a plurality of equipment disposed a delivery point. Network head-end modulators are controlled to implement channel grouping such that the signals requested by each piece of subscriber equipment at a delivery point are placed within radio frequency (RF) channels so that each such signal is within the frequency converted band of an EF-OTN tuner.02-05-2009
20100303466FULL-DUPLEX LASER COMMUNICATION USING SINGLE WAVELENGTH FROM AN OPTICAL TRANSMITTER - Methods, systems and other embodiments associated with a laser communication system using a single wavelength are presented. A first data is modulated onto an RF carrier to produce a modulated RF carrier. A laser is intensity modulated using with the modulated RF carrier. The intensity modulated laser beam is transmitted from an interrogator to a modulating retro-reflector (MRR) terminal. A portion of the laser beam is received at a receiver at the MRR terminal. Another portion of the laser is modulated at the MRR terminal with a second data to produce a re-modulated laser beam. The re-modulated laser beam is reflected back to the interrogator.12-02-2010
20100303467Optoelectronic Logic Gate - Systems and methods for implementing and using optoelectronic gates are disclosed. One such method includes superimposing an electrical data bit onto a first optical input to produce a pair of first-stage optical outputs. The first one of the pair of first-stage optical outputs carries the electrical data bit and the second carries the complement of the electrical data bit. The method further includes comparing an electrical target bit with the electrical data bit conveyed by the first first-stage optical outputs and with the complement of the electrical data bit conveyed by the second first-stage optical outputs, to determine whether the electrical target bit and the electrical data bit are same or different.12-02-2010
20100303465ADAPTER, ARRANGEMENT AND METHOD12-02-2010
20100310257Systems and Methods for Transmitting Signals in Communication Networks - For each path in a first plurality of paths in said communication network, a respective first weighted path length is determined based at least in part on a number of pure wireless links in the path. From among the first plurality of paths, a second plurality of paths having first weighted path lengths less than a threshold value is selected. For each path in the second plurality, a respective second weighted path length is determined based at least in part on a number of pure optical links in the path, and from among the second plurality of paths, a transmission path is selected having a highest second weighted path length. Information is transmitted via the transmission path.12-09-2010
20100310258INTEGRATED SENSOR NETWORKS WITH OPTICAL AND WIRELESS LINKS - A network includes an optical sensor network; and a radio frequency (RF) wireless sensor network coupled to the optical sensor network, wherein the optical sensor network and the RF wireless sensor network communications are coordinated over both optical and wireless links.12-09-2010
20100226653CIRCUIT FOR SWITCHING SIGNAL PATH, ANTENNA MODULE AND RADIO OVER FIBER SYSTEM - A circuit for switching a signal path includes a path selection element, a detector, a switch, and a control circuit. A first end and a third end of the path selection element are coupled to the detector and the switch, respectively. The switch is normally in a conductive status for outputting an upload signal through the path selection element and the switch when the upload signal is input from a second end of the path selection element. When a download signal is transmitted to the detector, the detector transmits the download signal to the path selection element and enables a detection signal. The control circuit switches the switch status to an open-circuit status for outputting the download signal isolated by the switch from the second end of the path selection element. Until the download signal is transmitted completely, the control circuit switches the switch status to the conductive status.09-09-2010
20090003831Network Interconnection System And Method With Separated Controlling And Bearing - A network interconnection system and method with separated controlling and bearing is presented. The system includes a radio access network (RAN) and a corresponding core network (CN). The RAN includes a base station network element and a base station controller (BSC). The BSC is set to separate the controlling and the bearing and includes an RAN-Server and a radio gateway (RGW). The RAN-Server has controlling plane functions of a radio network controller (RNC) and a handover controlling function between the wired access and the radio access for supporting the handover controlling between the wired access and radio access. The RGW has the user plane functions of the RNC and has a multi-to-multi connection relationship with the base station network element. The system reuses the standard Iu or Iur interface as far as possible, implements the smooth evolution of the current UTRAN architecture.01-01-2009
20110243565NETWORK ELEMENT FOR SIGNALS OF THE OPTICAL TRANSPORT NETWORK (OTN) - A crossconnect for asynchronous OTN signals operates synchronously internally at an internal clock rate. Received OTN signals are synchronized to an internal frame format by stuffing. The synchronized signals are parallelized and switched with a switching matrix comprising synchronously operating integrated circuits that operate at the internal clock rate. At the output, the synchronized signals are again destuffed and are transmitted again at the original bit rate.10-06-2011
20090142064COHERENT OPTICAL DETECTION AND SIGNAL PROCESSING METHOD AND SYSTEM - A method and system of coherent detection of optical signals. The system utilizes a digital signal processor to recover an incoming optical signal. The system employs a local oscillator, which does not need to be phase locked to the signal. The signal may be consistently recovered, even when the polarization state varies over time. Additionally, the signal may be recovered when it comprises two channels of the same wavelength that are polarization multiplexed together. In addition, any impairment to the signal may be reversed or eliminated.06-04-2009
20090034980IMPEDANCE MATCHING CIRCUIT WITH SIMULTANEOUS SHIELDING OF PARASITIC EFFECTS FOR TRANSCEIVER MODULES - An RF device includes a signal layer disposed over a ground plane having radio frequency (RF) transmission lines configured and dimensioned to provide impedance matching along the RF lines. A shield is formed as a part of the RF lines and disposed below the RF choke of a DC current supply to form an intermediate capacitance between the choke and the shield to control parasitic effects.02-05-2009
20100014868Hybrid optical/wireless RF transceiver modules and photonic network components - A data communications system including a passive optical network; an optical network termination unit connected to the network including a first optical receiver for voice and data on a 1480-1500 mm band to an end-user; an optical transmitter transmitting voice and data optical signals on a 1260-1360 mm band from the end-user, and a second optical receiver for receiving a digital video signal on a 1550 mm band from a video head-end service provider to the end-user; and a wireless RF communications transmitter coupled to at least the second optical receiver for wirelessly transferring the information content of the optical signal to an external device.01-21-2010
20110142452WIRELESS DATA TRANSMISSION BY WAY OF TERATHERTZ WAVES - The invention relates to a method for the wireless data, transmission between a transmitter and a receiver, the data being modulated as signals onto an electromagnetic carrier wave in the range of 0.1 and 10 terahertz. The carrier wave emitted by the transmitter is concentrated in the direction of the receiver, the transmitter being oriented towards the receiver by means of an automatic adjusting device and the adjusting device using wireless communication between the transmitter and the receiver for said orientation.06-16-2011
20110064413Method and Apparatus for Optical Wireless Communication - Methods and apparatus for optical wireless communication. In one embodiment, a wireless optical video system in which video content (e.g., DVI or HDMI) is transmitted wirelessly between a digital video source and a display device. This wireless optical communication is accomplished using a laser, encoded with the digital video data, directed from an optical transmitter to an optical receiver. In another embodiment, the data to be communicated includes high-definition video content.03-17-2011
20090257752NETWORK MEDIA SELECTING METHOD AND DEVICE THEREOF - A method for operating a network device is provided. The method comprises steps of providing a first transceiver to establish a first link via a first medium; providing a second transceiver to establish a second link via a second medium; and enabling one of the first and the second transceivers to establish a corresponding one of the first and second links according to a predetermined order, wherein a media access controller transmits a first datum via the first medium by using the first link, and transmits a second datum via the second medium by using the second link.10-15-2009
20100054746Multi-port accumulator for radio-over-fiber (RoF) wireless picocellular systems - A multi-port accumulator apparatus for a radio-over-fiber (RoF) wireless picocellular system that includes a housing that supports a tail cable port and a number of RoF transponder ports. The tail cable port is optically coupled to the RoF transponder ports so as to provide for optical transmission of uplink and downlink optical signals between the tail cable port and each of the transponder ports. The tail cable port is also electrically coupled to each transponder port so as to provide electrical power to each of the plurality of transponder ports. The multi-port accumulator supports two or more RoF transponders, one at each RoF transponder port. Each RoF transponder includes a directional antenna system that forms a picocellular coverage sub-area, with the combined sub-areas constituting a picocellular coverage area for the multi-port accumulator. The multi-port accumulator allows for the quick installation and deployment of large numbers of RoF transponders without having to individually connect each RoF transponder to a pair of downlink and uplink optical fibers carried by an optical fiber RF communication link.03-04-2010
20090087187Method for Transmitting Optically Transmitted Data Via a Radio Antenna and Corresponding Device - In a method a carrier signal is modulated depending on data to be transmitted. The modulated carrier signal is transmitted via an optical fiber line. The transmitted modulated carrier signal is demodulated, thereby producing received data. The transmitted modulated carrier signal is used to produce an auxiliary carrier signal. Said auxiliary carrier signal is modulated depending on the received data and then transmitted via a radio antenna.04-02-2009
20100054747Wireless Optical Data Probe - A portable data probe includes a portable housing, an optical transceiver circuit and a wireless communication circuit. The optical transceiver circuit is disposed substantially within the portable housing, but is also configured to be in optical communication with an exterior of the portable housing. The optical transceiver circuit is operable to convert between electrical signals and corresponding optical signals. The wireless communication circuit is also disposed substantially within the housing, and is operably coupled to the optical transceiver circuit. The wireless communication circuit is operable to communicate wireless signals to a remote wireless circuit.03-04-2010
20110150487High speed communication - The disclosure has application for use in establishing a communication link between a first location and a second location, the first location having an electrical driver circuit that receives input data to be communicated, and the second location having an electrical receiver circuit for producing output data representative of the input data. The method includes the following steps: providing a tilted charge light emitting device at the first location and coupled with the driver circuit such that the light produced by the tilted charge light-emitting device is a function of the input data; providing an optical fiber between the first and second locations; coupling light from the tilted charge light emitting device into the optical fiber; and providing, at the second location, a photodetector coupled with the optical fiber and with the receiver circuit; whereby electrical signals representative of the input data are output from the receiver circuit.06-23-2011
20090028569Optimum DC bias for an electro-optic switch - A method for balancing optical transmission for a first ON state and a second ON state of an electro-optic switch having an RF input port and a DC port, in one implementation, comprises the steps of associating a positive RF voltage with the first ON state of the electro-optic switch, associating a negative RF voltage with the second ON state of the electro-optic switch, wherein absolute value of the negative RF voltage associated with the second ON state is approximately equal to the positive RF voltage associated with the first ON state, and balancing optical transmission of the first ON state and the second ON state by adjusting a voltage applied to the DC port to obtain minimum optical transmission in an OFF state of the electro-optic switch.01-29-2009
20120121268Method And Apparatus Of Microwave Photonics Signal Processing - A radiofrequency (rf) signal-processing device offers the possibility of high bandwidth operation. The disclosed device applies principles of microwave photonics and Linear Amplification based on Nonlinear Components (LINC). For some applications, the device may be embodied in an rf amplifier or rf transmitter. In an embodiment, an optical phase modulator is configured to receive an optical carrier signal as input, and further configured so that, when driven by an rf modulation signal, it will produce a complementary pair of optical signals as output. Each of a pair of detectors is configured to convert a respective one of the complementary optical signals to an rf signal. An rf combiner is configured to add the converted radiofrequency signals from the detectors to form an output signal.05-17-2012
20110069962METHOD AND APPARATUS FOR DIMMING WITH RATE CONTROL FOR VISIBLE LIGHT COMMUNICATIONS (VLC) - A method and apparatus for dimming a luminary for lighting and data transmission in visible light communications (VLC).03-24-2011
20110069961DIGITAL MULTIMETER HAVING REMOTE DISPLAY WITH AUTOMATIC COMMUNICATION BINDING - An electrical test instrument comprising a base unit having a first communication address. A remote display unit separate from the base unit and having a second communication address is also provided. Communication circuitry is operative to provide electrical communication in a first RF mode between the base unit and the remote display unit as a bound communication pair based on the first and second communication addresses. The communication circuitry is further operative to operate selectively in a second secure communication mode. The first and second communication addresses are exchanged in the second secure communication mode to establish the bound communication pair for subsequent communication in the first RF mode. In some exemplary embodiments, the second communication mode is an optical communication mode (e.g., an IR communication mode).03-24-2011
20120201544ACCESS SYSTEM AND METHOD FOR TRANSMITTING ETHERNET SIGNAL AND MOBILE COMMUNICATION SIGNAL - An access system and method for transmitting Ethernet signals and mobile communication signals. The system includes a near-end host unit and remote-end user units. Through the near-end host unit, the Ethernet signals and mobile communication signals can be combined. The near-end and remote-end host units are connected through four pairs of twisted pairs. The combined Ethernet and mobile communication signals are sent to a user terminal for providing broadband access service and wireless access service. Premises network resources can be used without re-laying category 5 cables, so the investment is less and it is quick and convenient to provide service. Furthermore there needs to be added only one host unit beside the optical network unit equipment, and replace the user terminal simultaneously. Power is not needed to be taken at the user's home. The placement position of the terminal is flexible without being limited by the power-taking positions.08-09-2012
20110069963Optoelectronic Switches Using On-chip Optical Waveguides - Embodiments of the present invention are directed to optoelectronic network switches. In one embodiment, an optoelectronic switch includes a set of roughly parallel input waveguides and a set of roughly parallel output waveguides positioned roughly perpendicular to the input waveguides. Each of the output waveguides crosses the set of input waveguides. The optoelectronic switch includes at least one switch element configured to switch one or more optical signals transmitted on one or more input waveguides onto one or more crossing output waveguides.03-24-2011
20110150486Data centerr with free-space optical communications - A data center for executing a data processing application includes processing units, sub-units or servers. Each of the processing units, sub-units or servers can execute a part or all of the data processing application. The processing units, sub-units or servers are electrical disjoint with respect to data communications, but can communicate with each other over free space optical links.06-23-2011
20110150484Method and Apparatus for Improved SBS Suppression in Optical Fiber Communication Systems - Methods of transmitting an optical signal through optical fiber in a manner suppressing stimulated Brillouin scattering (SBS) are provided. A light beam emitted from a light source is modulated by driving either the light source or a separate phase modulator or both simultaneously with a separate high frequency signal dithered by one or more low frequency dithering signals of a frequency or frequencies lower than that of the high frequency signal. Thereafter, the light beam is further modulated externally with an RF information-carrying signal. The high frequency signal is at least twice a highest frequency of the RF information-carrying signal. The light beam modulated with the RF information-carrying signal is coupled into optical fiber. The high frequency signal dithered by the one or more low frequency dithering signals spreads the optical power of the light beam in a wider spectral range thereby raising the SBS threshold power level for purposes of suppressing SBS while the undesired induced spurious frequency component level is controlled. The form of the spread spectrum is also controlled and adjusted. An optical transmitter is also disclosed.06-23-2011
20080267632Device for Optically Signaling an Incoming Call - The present invention relates to a device for optical signaling an incoming call in a telecommunication terminal, said terminal comprising acoustic means for signaling the incoming call with an acoustic signal and said device comprising optical means (10-30-2008
20080199184TERMINAL AND INFORMATION RELAY APPARATUS - A terminal and an information relay apparatus allowing automatic setup for wireless connection without requiring setup operation by the user and capable of preventing information leakage when used at home are provided. A wireless LAN terminal communicates with a wireless access point relaying information to and from a communication apparatus constituting a communication network. Wireless LAN terminal includes an ROM, an optical communication block, a communication unit, and a CPU. The optical communication block is for optical communication. Communication unit is for communication by radio signal. CPU causes the optical communication unit to transmit a start request signal. After transmission of the start request signal, when the optical communication block receives an information request signal, CPU causes the optical communication block to transmit identification information stored in ROM. After the optical communication block transmits the identification information, CPU causes the communication unit to transmit log-in request and the like.08-21-2008
20080253773System And Communication Method For Interconnecting Optical Network And Radio Communication Network - A system and communication method for the system interconnecting the optical network with the radio communication network is provided. The solution mainly applies to an optical access network employing fiber for transmission and the radio communication network connected to the optical access network, wherein a base station of the radio communication network is connected to the optical access network and communicates to an entity in the optical access network to achieve interconnection between the optical network and the radio communication network. After the interconnection is established, a user equipment can enjoy communication services through the interconnected radio communication network and the optical network.10-16-2008
20110026930METHODS AND APPARATUS TO UPGRADE COMMUNICATION SERVICES IN SUBSCRIBER DISTRIBUTION AREAS - Example methods and apparatus to upgrade communication services in subscriber distribution areas are disclosed. A disclosed example method involves installing an optical network unit communicatively coupled to an optical line terminal serving a subscriber distribution area communicatively coupled to the optical line terminal. The optical network unit includes a first subscriber downlink interface to serve a first subscriber premises and a second subscriber downlink interface to serve a second subscriber premises. A first communication service is provided to the first subscriber premises via a first electrically conductive medium communicatively coupled to the first subscriber downlink interface via a first removably attachable subscriber downlink module. A second communication service is provided to the second subscriber premises via a second electrically conductive medium communicatively coupled to the second subscriber downlink interface via a second removably attachable subscriber downlink module. In response to receiving a request to upgrade the first communication service, the first removably attachable subscriber downlink module is replaced with a third removably attachable subscriber downlink module, an optical transmission medium is connected between the third removably attachable subscriber downlink module and the first subscriber premises while retaining the second electrically conductive medium communicatively coupled to the second subscriber downlink interface to provide the second communication service to the second subscriber premises.02-03-2011
20110262145RF/OPTICAL SHARED APERTURE FOR HIGH AVAILABILITY WIDEBAND COMMUNICATION RF/FSO LINKS - An RF/Optical shared aperture is capable of transmitting and receiving optical signals and RF signals simultaneously. This technology enables compact wide bandwidth communications systems with 100% availability in clear air turbulence, rain and fog. The functions of an optical telescope and an RF reflector antenna are combined into a single compact package by installing an RF feed at either of the focal points of a modified Gregorian telescope.10-27-2011
20110262144Compensation of distortion from SBS/IIN suppression modulation - A method includes modulating a laser that is coupled to a fiber; modulating the laser with a member selected from the group consisting of low frequency thermal modulation or bias modulation to broaden a laser linewidth, increase an SBS threshold and reduce an IIN; and modulating the laser with a predistorting modulation selected from the group consisting of phase modulation or amplitude modulation, the predistorting modulation being of equal magnitude but opposite phase as that produced in at least one member selected from the group consisting of the laser or the fiber as a result of the low frequency thermal modulation or bias modulation. An apparatus includes a laser; and a fiber coupled to the laser, wherein the laser is i) modulated ii) modulated with a member selected from the group consisting of low frequency thermal modulation or bias modulation to broaden a laser linewidth, increase an SBS threshold and reduce an IIN and iii) modulated with a predistorting modulation selected from the group consisting of phase modulation or amplitude modulation, the predistorting modulation being of equal magnitude but opposite phase as that produced in at least one member selected from the group consisting of the laser or the fiber as a result of the low frequency thermal modulation or bias modulation.10-27-2011
20100158534MULTIRATE COMMUNICATION APPARATUS AND METHOD OF CONTROLLING LINE-CONFIGURATION OF MULTIRATE COMMUNICATION APPARATUS - There is provided the multirate communication apparatus including: an interface board to connect with a plurality of lines of different bit rates and processing transmission signals of the lines having a first line capacity; a port to mount a transmission module to transmit and receive the transmission signals; a line identifying unit to identify a line type of the transmission module mounted in the port; a plurality of signal processor to process transmission signals having a second line capacity obtained by dividing the first line capacity by a predetermined number; and a line-configuration controller to control a configuration of lines processed in respective the signal processor, based on an identification result of the line identifying unit; wherein the signal processor processes the transmission signals in accordance with the line type of the transmission module mounted in the port, base on a control by the line-configuration controller.06-24-2010
20110020005EXTERNALLY MODULATED LASER OPTICAL TRANSMISSION SYSTEM WITH FEED FORWARD NOISE CANCELLATION - An optical transmitter for generating a modulated optical signal for transmission over a fiber optic link to a remote receiver including a laser; a modulator for externally modulating the optical output signal with a RF signal to produce an optical signal including a modulated information-containing component; and a phase modulator coupled either to the output of the modulator or directly to the output of the laser for reducing or canceling the noise signals generated in the laser.01-27-2011
20110188862LAYOUT APPARATUS, RADIO APPARATUS, AND METHOD FOR COMMUNICATING IN AN AIRPLANE - A layout apparatus for communicating includes, but is not limited to, a structural device, a first signal adjustment device and a radio device. The structural device is designed for configuring the layout of a room, and the first signal adjustment device is adapted for the electrical-optical conversion of an antenna signal. Furthermore, the first signal adjustment device and the radio device are arranged in the structural device, and the radio device is connected to the first signal adjustment device in such a manner that the antenna signal can be transmitted and/or received as a radio signal.08-04-2011
20090028571ELECTRICAL SIGNAL TRANSMISSION MODULE, METHOD OF TRANSMITTING ELECTRIC SIGNALS AND ELECTRICAL INSPECTION APPARATUS HAVING THE SAME - An electrical signal transmission module includes a plurality of optical signal lines and a plurality of electrical signal lines. The plurality of optical signal lines converting a first externally input electrical signal into an optical signal, transmitting the optical signal, converting the optical signal back into the first electrical signal, and outputting the first electrical signal. The plurality of electrical signal lines transmitting a second externally input electrical signal and outputting the second electrical signal.01-29-2009
20110064414OVERMODED DISTRIBUTED INTERACTION NETWORK - An overmoded distributed interaction network is provided that generates high peak and average RF power amplification at high frequencies. A series of overmoded cavities are bounded by parallel or concentric grids that may be separated by metallic spacers adapted to function as a photonic bandgap circuit to suppress competing electromagnetic modes. The selected electromagnetic modes have wavelengths much shorter than the lateral dimension of the grids, allowing the beam-wave interaction to be distributed transversely for improved interaction efficiency. The grids may optionally be slotted and arranged to provide a serpentine traveling wave tube configuration.03-17-2011
20080310847OPTICAL FREQUENCY DIVISION MULTIPLEXED COMMUNICATIONS OVER THE HORIZON - A non-line of sight (NLOS) communications system and method are provided that implement orthogonal frequency, division multiplexing. A data generator produces a digital data stream, which is converted into M parallel frequency sub-carrier digital data streams (where M is an integer), each sub-carrier is encoded with data and an Inverse Fast Fourier Transform operation is applied, and an output signal is converted to an analog signal, which is imposed onto an optical beam generated by a light source. The beam is transmitted skywards at an elevation angle above the horizon in at least one direction. The beam is scattered due to Mie and Raleigh effects, forming a scattered waveform. At least a part of the scattered waveform is received by a receiver outputting an electrical signal, which enters a DSP unit. The DSP unit digitizes the electrical signal, performs Fourier transformation and recovers data from M sub-carrier signals.12-18-2008
20110033189RETURN PATH COMPLIANCE IN NETWORKS - This disclosure is directed to techniques for facilitating return path compliance in networks. A device, such as an optical network terminal (ONT), may, for example, buffer a digital representation of an upstream analog signal to facilitate return path compliance specified by a Data Over Cable Service Interface Specification (DOCSIS) 3.0 standard. The ONT may comprise a first conversion module that converts an upstream analog signal into a corresponding digital signal and a signal detection module that determines whether the upstream analog signal represents a valid upstream communication. The device may further comprise a buffer that buffers the corresponding digital signal while the signal detection module makes the determination, a second conversion module that converts the buffered digital signal into a reconverted upstream analog signal upon the determination that the upstream analog signal is valid and a laser that transmits the reconverted upstream analog signal via a fiber optical cable.02-10-2011
20110064415RADIO FREQUENCY PHOTONIC TRANSCEIVER - In a first aspect, the invention includes a radio frequency photonic transceiver, comprising: a radio frequency receiver; a radio frequency photonic transmitter; and a switch between the input of the radio frequency photonic receiver and the output of the radio frequency photonic transmitter. In a second aspect, the invention includes an apparatus, comprising: a radio frequency photonic receiver; a radio frequency photonic transmitter; and a switch between the input of the radio frequency photonic receiver and the output of the radio frequency photonic transmitter. In a third aspect, the invention includes a radio frequency, photonic transceiver, comprising: means for generating a radio frequency modulated optical signal; a radio frequency photonic transmitter; and means for switching between the input of the radio frequency photonic receiver and the output of the radio frequency photonic transmitter. In a fourth aspect, the invention includes a method, comprising: generating a first optical signal; electro-optically generating a first radio frequency signal from the first optical signal; transmitting the first radio frequency signal; receiving a second radio frequency signal; and electro-optically modulating a second optical signal with the frequency of the second radio frequency signal. In a fifth aspect, the invention includes a zero-intermediate frequency radio frequency photonic transmitter-receiver unit. In a sixth aspect, the invention includes a radio frequency photonic transmitter-receiver unit including a direct conversion receiver with receiver output.03-17-2011
20110318013ASSET TRACKING SYSTEM FOR RACK-BASED ENCLOSURES - A system includes a beacon device including a communication strip having a plurality of directed light emitters distributed along the communication strip. The beacon device can transmit a directed light signal via the directed light emitters. The system further includes a tag including a processor, a radio frequency transmitter coupled to the processor, a directed light receiver coupled to the processor, and a lens having first and second major surfaces and a side surface, the tag to receive the directed light signal via the side surface and to transmit a radio frequency tag message via the radio frequency transmitter. The system also includes a radio frequency reader to receive the radio frequency tag message.12-29-2011
20110318012COMBINED OPTICAL AND COAXIAL HUB FOR ROUTING AN UPSTREAM SIGNAL FROM A TWO-WAY DIGITAL OUTPUT TO AN EXISTING HYBRID FIBER COAX NETWORK - A device for routing an upstream signal from a two-way digital output to an existing hybrid fiber coax network. A first path includes an input for receiving downstream optical signals associated with data and a two-way digital port for communicating the data of the downstream optical signals to a subscriber. A second path includes a hybrid fiber coax input and a two-way hybrid fiber coax port for communicating with the subscriber. A filter is disposed in the first path for routing an upstream signal from the subscriber at the two-way digital port to the second path for forwarding upstream via the hybrid fiber coax input.12-29-2011
20100260502 TRANSMITTER OF MULTIMEDIA DATA - Disclosed is a multimedia data transmitter that can transmit multimedia data such as image, voice and control signal whose media are different from each other through an optical transmission medium such as plastic or glass optical cables to a short or long distance area. The multimedia data transmitter includes: a digital signal processing logic, converting multimedia data transmitted in different transmission formats into data of a single transmission format, converting parallel image data into serial image data; an interface control logic, generating a control signal for transmission of the data converted by the digital signal processing logic, interfacing interface data; an optical driver, performing optical transmission of the serial data generated by the digital signal processing logic according to the control signal generated by the interface control logic, processing an optical-to-electrical converted signal.10-14-2010
20120002972Techniques for Single Sideband Suppressed Carrier (SSBSC) Optical Signals that Scale to Bandwidths over 20 Gigahertz - A method and apparatus includes an optical source for a single order single-sideband suppressed-carrier optical signal with a bandwidth that scales from over 1 gigaHertz to greater than 20 gigaHertz. In an example embodiment, an apparatus includes a stable laser source configured to output an optical carrier signal at a carrier frequency. The apparatus includes a radio frequency electrical source configured to output an electrical radio frequency signal with a radio frequency bandwidth less than one octave. The apparatus also includes an optical modulator configured to output an optical signal with the optical carrier signal modulated by the radio frequency signal in a plurality of orders of optical frequency sidebands. The apparatus further includes an optical filter configured to pass one single order optical frequency sideband of the optical signal.01-05-2012
20110097089TRANS-SPECTRAL COMMUNICATIONS DEVICE - A communications device for receiving and transmitting signals at multiple wavelengths may include a combination optical telescope and RF receiver/transmitter for receiving and transmitting signals at multiple wavelengths. The communications device may also include a nonlinear mixing medium coupled to the combination optical telescope and RF receiver/transmitter. The nonlinear mixing medium may be adapted to switch between optical carrier frequency ranges without detecting and retransmitting a received signal.04-28-2011
20120207482ANALOG RADIO FREQUENCY TRANSPORT OVER OPTICAL MEDIA USING CONTINUOUS OPTICAL PHASE MODULATION AND NONCOHERENT DETECTION - Analog transport of a wideband RF signal is effectively and efficiently provided using a coherent, narrowband optical carrier. The wideband RF signal is phase modulated onto the carrier at a first location. Non-coherent discrimination is applied to the modulated carrier at a second, different location to generate an amplitude modulated optical signal where the amplitude modulation represents the original wideband RF signal. A photo-detector is then used to regenerate a representation of the original wideband RF signal. The method and apparatus of the invention can be applied in systems dedicated to the analog RF transport or in wavelength division multiplexed systems which also provide transport for other analog or digital data.08-16-2012
20100329690OPTICAL COMMUNICATION SYSTEM, OPTICAL COMMUNICATION METHOD AND OPTICAL COMMUNICATION APPARATUS - Transmission-side communication apparatus 12-30-2010
20120014697ANTENNA DEVICE - An antenna device is provided, which includes a first antenna unit and a second antenna unit. The first antenna unit includes a first radiation module, a power divider/combiner network connected to the first radiation module, and a feeder interface connected to the power divider/combiner network. The feeder interface is connected to a radio remote unit (RRU) or a macro base station through a feeder. The second antenna unit includes a second radiation module, a transceiver array connected to the second radiation module, a baseband processing unit (BPU) connected to the transceiver array, and an optical fiber interface connected to the BPU. The optical fiber interface is connected to a baseband unit (BBU) through an optical fiber. Therefore, after the existing passive antenna is replaced by the provided antenna device, the RRU or macro base station in the original network can still be used, which reduces waste of resources.01-19-2012
20120020669METHOD AND SYSTEM FOR CHARACTERIZING AN OPTICAL DEVICE - An embodiment of the invention relates to a system comprising an optical device (01-26-2012
20120020668Method And An Interconnecting Node For Use In An Access Network - The invention relates to an interconnecting node for use in interconnecting a passive optical network (PON) and a copper wire xDSL access network, wherein said interconnecting node comprises an optical network unit (ONU) arranged to be connected to an optical line termination (OLT) over the PON network; and at least one xDSL access device connectable to at least one user end xDSL equipment over the copper wire xDSL access network. The interconnecting node is characterized in thatit further comprises a clocking interconnect between the ONU unit and the at least one xDSL access device arranged to distribute a clock signal obtained from optical network transmissions received in the ONU unit over the PON network to an timing reference input of the at least one xDSL access device. The invention also relates to a further interconnecting node, methods for use in interconnecting nodes, a central office optical network apparatus and an access network.01-26-2012
20120301149Method And System For Hybrid Integration Of Optical Communication Systems - Methods and systems for hybrid integration of optical communication systems are disclosed and may include receiving continuous wave (CW) optical signals in a silicon photonics die (SPD) from an optical source external to the SPD. The received CW optical signals may be processed based on electrical signals received from an electronics die bonded to the SPD via metal interconnects. Modulated optical signals may be received in the SPD from optical fibers coupled to the SPD. Electrical signals may be generated in the SPD based on the received modulated optical signals and communicated to the electronics die via the metal interconnects. The CW optical signals may be received from an optical source assembly coupled to the SPD and/or from one or more optical fibers coupled to the SPD. The received CW optical signals may be processed utilizing one or more optical modulators, which may comprise Mach-Zehnder interferometer modulators.11-29-2012
20120155884OPTICAL REPEATER SYSTEM - The present invention relates to an optical relay system for transmitting multi-band frequency signals with limited bands by using optical lines. According to the present invention, a plurality of band-limited signals are band-combined into one signal by using a combiner, and the signals are transmitted through multiple outputs by using a distributor, and thus a multi-stage filter is not necessary. In addition, the present invention is capable of effectively solving various problems such as damage to the original signals caused by the band combination of the multi-stage filter, and there is no need to precisely connect each of the band-limited signals to the determined ports of the combiner and the signals can be connected to random ports, thereby improving convenience of use.06-21-2012
20120155883OPTICAL RECEIVER AND OPTICAL RECEIVING METHOD - An optical receiver includes an analog/digital converter, and a control circuit. The analog/digital converter has a dynamic range at a time of converting an analog electric signal generated based on an optical signal to a digital electric signal. The dynamic range is variable, and the control circuit varies the dynamic range of the analog/digital converter based on the chromatic dispersion of the optical signal.06-21-2012
20100196013SYSTEM AND METHOD FOR A PHOTONIC SYSTEM - A photonic system and method are provided. The system includes an optical source configured to generate a carrier signal; and a modulator configured to modulate the carrier signal with a radio frequency, (“RF”) input signal to generate a modulated signal. The system also includes an optical filter configured to filter the modulated signal to generate a vestigial sideband modulated signal; and an optical detector configured to demodulate the vestigial sideband signal to generate an RF output signal. The system further includes a wavelength controller module configured to set an operating parameter of the optical source.08-05-2010
20110091216LONG RANGE SELECTIVE RFID USING LASER PHOTODETECTION WAKEUP - A data transfer system includes a radio frequency identification (RFID) reader having a radio frequency transmitter and receiver and a laser. The data transfer system also includes a RFID tag on a container which has a first photosensitive device coupled to an electronic circuit in the tag which is in a first state when light from the laser is not striking the photosensitive device and in a second state when light from the laser is striking the photosensitive device such that the RFID tag transmits a signal only when a light beam from the laser is striking the photosensitive device. The tag may be passive, semi-passive (battery assisted passive-BAP), or active. If the tag is BAP then the laser light causes the tag to wake up so that it can respond to the RF signal from a RFID reader. The radio frequency transmitter provides power to the RFID tag sufficient to transmit a signal to the receiver which can be decoded by the RFID reader when the RFID reader is 40 feet or more away from the RFID tag.04-21-2011
20090297155Wideband microwave and millimeter wave filters using photonic spectral filtering - An apparatus and method is disclosed for producing and filtering optical and electrical waveforms. The apparatus includes an electro-optical modulator, an optical filter capable of modulating at least two spectral regions within the bandwidth of the electrical waveform, and an optical-to-electrical converter. The optical filter includes a spatial dispersion means, a spatial modulating means having the capability to substantially independently modulate a characteristic of each of a pair of optical spatial elements.12-03-2009
20110103799Systems And Methods For On-Chip Data Communication - An on-chip data communications infrastructure includes a hybrid, photonic/electronic network. The network includes a plurality of interconnected optical switches, each under the control of an electronic router. The electronic routers are connected in a fashion similar to the optical switches, forming a parallel, photonic/electronic network. Electronic path setup messages are routed through the electronic network. At each hop, a photonic switching element in a parallel, photonic network is reserved. When the electronic path setup message reaches its destination, a chain of reserved optical switches is ready to channel the optical data through the photonic network.05-05-2011
20100290787Power Distribution Devices, Systems, and Methods for Radio-Over-Fiber (RoF) Distributed Communication - Power distribution devices, systems and methods for a Radio-over-Fiber (RoF) distributed communication system are disclosed. In one embodiment, an interconnect unit is coupled between a head-end unit and one or more remote units. The interconnect unit includes a plurality of optical communication links each configured to carry RoF signals to and from a head-end unit to remote units. The RF electrical signals from the head-end unit are converted to RF optical signals and communicated over the optical communication links in the interconnect unit to the remote units. The remote units convert the optical signals to electrical signals and communicate the electrical signals to client devices. To provide power to the remote units, the interconnect unit electrically couples power from at least one power supply to a plurality of power branches. Each power branch is configured to supply power to a remote unit connected to the interconnect unit.11-18-2010
20100247104Optical Communication System and Method for Generating Dark Return-to-Zero and DWDM Optical MM-Wave Generation For ROF Downstream link using Optical Phase Modulator and Optical Interleaver - A method of generating a dark-RZ pulse in an optical communications system with a dual-arm modulator by setting a direct current bias on the modulator to a specific value such that an output optical power from the modulator achieves a maximum value when the RF signals on the first and second arms of the modulator are off and maintaining the direct current bias at the specific value and applying RF signals to the first and second arms of the modulator and delaying one of the RF signals applied to one of the first and second arms relative to the other of the RF signals such that a dark-RZ pulse is generated with a duty cycle based on the delay. Another aspect of the invention provides a method for generating dense wave division multiplexing (DWDM) optical mm-waves in an optical transmission system by phase modulated DWDM optical signal and applying the phase modulated DWDM optical signal to an input port of an optical interleaver, the optical interleaver having a specified bandwidth to suppress the optical carriers and convert the DWDM optical signal to DWDM optical mm-waves; and amplifying the DWDM optical mm-waves and transmitting the DWDM optical mm-waves over single mode fiber (SMF).09-30-2010
20100247103Method and apparatus of microwave photonics signal processing - A radiofrequency (rf) signal-processing device offers the possibility of high bandwidth operation. The disclosed device applies principles of microwave photonics and Linear Amplification based on Nonlinear Components (LINC). For some applications, the device may be embodied in an rf amplifier or rf transmitter. In an embodiment, an optical phase modulator is configured to receive an optical carrier signal as input, and further configured so that, when driven by an rf modulation signal, it will produce a complementary pair of optical signals as output. Each of a pair of detectors is configured to convert a respective one of the complementary optical signals to an rf signal. An rf combiner is configured to add the converted radiofrequency signals from the detectors to form an output signal.09-30-2010
20120163829POWER DISTRIBUTION DEVICES, SYSTEMS, AND METHODS FOR RADIO-OVER-FIBER (RoF) DISTRIBUTED COMMUNICATION - Power distribution devices, systems and methods for a distributed communication system are disclosed. In one embodiment, an interconnect unit is coupled between a head-end unit and one or more remote units. The interconnect unit includes a plurality of communication links each configured to carry signals to and from a head-end unit to remote units. To provide power to the remote units, the interconnect unit electrically couples power from at least one power supply to a plurality of power branches. Each power branch is configured to supply power to a remote unit connected to the interconnect unit.06-28-2012
20120163828Apparatus - An apparatus including a galvanic connector configured to interconnect with a corresponding galvanic connector in an empty light fitting; a network interface configured to operate as a node in a data communications network; and a communications interface for enabling communication between an environment adjacent to the light fitting and the data communications network.06-28-2012
20120134678SYSTEM FOR PROVIDING PHYSICALLY SEPARATED COMPUTE AND I/O RESOURCES IN THE DATACENTER TO ENABLE SPACE AND POWER SAVINGS - An embodiment of a system and method disaggregate I/O resources from a server's compute resources, such as CPU and memory, by moving the server's local I/O devices to a remote location apart from the server's compute resources. An embodiment uses optical technology to accomplish the fast communication speeds needed between the compute resources and the remotely located I/O resources. Specifically, an embodiment uses fiber-optic cables and electrical-to-optical conversion to facilitate communication between the compute resources and the I/O resources. The compute resources and the remotely located I/O resources can be designed differently to allow conductive liquid cooling for the compute resources and air cooling for the I/O resources.05-31-2012
20120213525Oilfield Optical Data Transmission Assembly Joint - A joint for disposing between a rotatable drum and stationary surface equipment. The joint serves as a channel through which optical data from a well access line may be routed through the rotating drum and to the stationary equipment for processing. The optical data may be routed in a manner that allows for multi-fiber transmissions with one fiber dedicated to uphole transmissions and another dedicated to downhole transmissions. This is achieved through embodiments of the joint in spite of the separate optical channels involved sharing the same central axis to allow for data transfer between moving and stationary joint components.08-23-2012
20110176810SYSTEM AND METHOD FOR MULTI-RATE, HIGH-SENSITIVITY CLOCK AND DATA RECOVERY WITH ADJUSTABLE DECISION THRESHOLD, RF INPUT, AND OPTICAL-TO-ELECTRICAL CONVERSION - The present invention provides a system and method for multi-rate, high-sensitivity CDR, including a variable/adjustable decision threshold, RF input clock recovery, and OE conversion feature. The system includes an optical input connector, CDR circuit, decision threshold circuit, internal power supply, OE converter, external electrical output, and multiple clock outputs. The system is assembled in a single, stand-alone unit. The system includes an OC-192 data output, and OC-192 (9.953-10.709 GHz) and ¼ OC-48 (2.488-2.677 GHz) clock outputs. The decision threshold level is adjustable and optimized by a system user. The system is also used in combination with a digital communications analyzer. A recovered clock of the CDR circuit provides trigger for the DCA. The system includes an electrical input connector. Optionally, the system triggers directly from an RF electrical input in substitution of an optical input. The system is also used to convert an optical signal to an electrical signal, bypassing the CDR circuit.07-21-2011
20120315050Device, equipment and method for data transmission by touch - The disclosure provides a direction sensor, including a transmission device and a reception device, wherein the transmission device contains an encoding chip for encoding the equipment ID of local equipment into a binary signal, a transmission circuit for adjusting the binary signal to a pulse electric signal and an electromagnetic wave generator for sending the pulse electric signal in the form of electromagnetic wave; and the reception device contains a photoelectric converter for receiving the electromagnetic wave and converting the electromagnetic wave to a pulse electric signal, a reception circuit for converting the pulse electric signal to a binary signal and sending the binary signal to a decoding chip and the decoding chip for reading equipment IDs of other equipment from the binary signal, obtaining the equipment ID of the local equipment, and sending the read equipment ID and a sensor code of the sensor itself when determining that a read equipment ID is different from the equipment ID of the local equipment. The disclosure also provides a device, equipment and method for data transmission by touch. Application of the device, equipment and method provided by the disclosure enables a simple and explicit data transmission procedure and provides convenience for user operation.12-13-2012
20120315049METHOD AND APPARATUS FOR OPTIMIZED ANALOG RF OPTICAL LINKS - A system and method for optimizing an optical RF photonic link system is presented. The system comprises a modulator subsystem in which nonlinear response is compensated by an envelope precompensation method and employs an optical filter to suppress optical carriers and extract modulated sidebands, an optical amplifier, and an array of photodetectors, each having a plurality of pairs of diodes. The modulator subsystem performs optical filtering on the signal, the signal is amplified by the optical amplifier and sent to the array of photodetectors. The optical amplifier can be an erbium doped fiber amplifier, or a phase sensitive amplifier. The optical power can be delivered to each diode of the array of photodetectors via a photonic integrated circuit.12-13-2012
20120076498HYBRID ANALOG-DIGITAL PHASED MIMO TRANSCEIVER SYSTEM - A transmitter supporting multiple-input, multiple-output communications is provided. The transmitter includes a signal processor, a plurality of feed elements, and an aperture. The signal processor is configured to simultaneously receive a plurality of digital data streams and to transform the received plurality of digital data streams into a plurality of analog signals. The number of the plurality of digital data streams is selected for transmission to a single receive antenna based on a determined transmission environment. The plurality of feed elements are configured to receive the plurality of analog signals, and in response, to radiate a plurality of radio waves toward the aperture. The aperture is configured to receive the radiated plurality of radio waves, and in response, to radiate a second plurality of radio waves toward the single receive antenna.03-29-2012
20100046953Agile-beam laser array transmitter - An Agile-Beam Laser Array Transmitter (ABLAT) uses an array of emitters and an array of lenses to project electromagnetic beams over a wide angular coverage area in the far field. Differences in the separation pitches of the two arrays allows the ABLAT to project beams to contiguous and/or overlapping positions, depending on the ratio of the separation pitches and the lens focal length. Compared to other beam steering technology, the ABLAT is a smaller, lighter, and more efficient means of projecting beams over wider angular coverage areas. Various embodiments can be used in any beam steering application, including, but not limited to: free-space optical communications; light detection and ranging (lidar); optical scanning (e.g., retinal or bar-code scanning); display projection; image capture; optical character recognition; scanning laser microscopy; non-destructive testing; printing; facsimiles; map making; web inspection; color print processing; phototypesetting and platemaking; laser marking; material processing; DNA analysis; and drug discovery.02-25-2010
20100046952WIDEBAND RF PHOTONIC LINK FOR DYNAMIC CO-SITE INTERFERENCE MITIGATION - A method is provided for co-site interference mitigation in an RF communication system. Spectral nulls created in an optical domain may be used to mitigate interfering signals in an RF signal. The method includes: receiving an RF input signal via an antenna; generating two optical signals that are each modulated using the RF signal; creating a phase delay in one of the two optical signals that corresponds with a spectral null at a frequency of an interfering signal; converting the two optical signals into two corresponding electrical signals and combining the two electrical signals to create spectral nulls via interference between the two signals and form a mitigated output signal. In this way, the spectral null offsets the amplitude of the interfering signal, thereby reducing the signal strength of the interfering signal.02-25-2010
20120177376Conformal Hybrid EO/RF Aperture - A conformal hybrid elctro-optical/radio frequency (EO/RF) aperture including an optical phased array (OPA) in a center portion of the aperture, and a variable inclination continuous transverse stub (VICTS) RF antenna surrounding the OPA using a plurality of continuous transverse stub (CTS) subarrays.07-12-2012
20120177375CONNECTOR ASSEMBLY THAT HAS OPTICAL AND HIGH DATA RATE ELECTRICAL CAPABILITIES AND THAT IS BACKWARDS COMPATIBLE WITH EARLIER UNIVERSAL SERIAL BUS (USB) STANDARDS - A connector assembly is provided that has optical communications capabilities and high data rate electrical communications capabilities and that is backwards compatible with one or more USB standards. A socket of the connector assembly has high data rate electrical connections and USB electrical connections such that it is capable of supporting high data rate signaling protocols for high data rate devices as well as USB signaling protocols. A plug of the connector assembly has high data rate electrical connections, USB electrical connections, and an optical-to-electrical (OE)/electrical-to-optical (EO) conversion module. The socket can be mated with the plug of the invention and with USB plugs that are compliant with existing USB plugs. Thus, both the socket and the plug have backwards compatibility with one or more existing USB standards.07-12-2012
20080205893ANGULAR SEAM FOR AN ELECTRONIC MODULE - In one example embodiment, an angular seam includes a first complementary structure defined in a first shell of an optoelectronic transceiver module, and a second complementary structure defined in a second shell of the optoelectronic transceiver module. The second complementary structure is configured to receive the first complementary structure so that an angular seam is defined that is substantially non-transmissive to electromagnetic radiation.08-28-2008
20100272443FREE-SPACE SENSOR NETWORK - A free-space network may include: a plurality of geographically distributed free-space sensors for sensing at least one target; a networking apparatus for combining sensed information regarding at least one target from the geographically distributed free-space sensors; a target information device for communicating to at least one user combined sensed information regarding at least one target, from the geographically distributed free-space sensors, as provided by the networking apparatus; and at least one communication link connecting in free-space the geographically distributed sensors, the networking apparatus, and the target information device.10-28-2010
20090016729FREQUENCY SELECTIVE MMW SOURCE - The present invention relates to the design and operation of a frequency selective electrooptic source. In accordance with one embodiment of the present invention, the electrooptic source comprises an optical signal generator, optical circuitry, and at least one optical/electrical converter wherein the optical signal generator comprises a plurality of optical outputs characterized by distinct output frequencies and the optical circuitry is configured to permit the selection and combination of different ones of the distinct-frequency optical outputs to generate a modulated optical signal, which is converted to a millimeter or sub-millimeter wave. Additional embodiments are disclosed and claimed.01-15-2009
20120230696LED LIGHT COMMUNICATION SYSTEM - An LED light and communication system includes at least one optical transceiver, the optical transceiver including a light support and a processor. The light support has a plurality of light emitting diodes and at least one photodetector attached thereto, the light emitting diodes receiving power from a power source. The processor is in communication with the light emitting diodes and the at least one photodetector, the processor capable of illuminating the light emitting diodes to simultaneously create at least one first light signal, and at least one second light signal, the first light signal being observable to the unaided eyes of an individual and the second light signal not being observable to the unaided eyes of the individual. The second light signal includes at least one data packet. The at least one data packet comprises global positioning system (GPS) location information.09-13-2012
20110236024METHOD AND APPARATUS FOR PICOCELL DISTRIBUTED RADIO HEADS PROVIDING MACROCELL CAPABILITIES - In one embodiment, a system for telecommunications includes a base band unit, a backhaul network, a shared network, a cascaded chain of remote radio heads, and an optical node coupled to the cascaded chain of remote radio heads. The backhaul network is coupled to the base band unit and to the shared network. The cascaded chain includes a first remote radio head coupled to a first set of antennas, a second remote radio head coupled to a second set of antennas. The second remote radio head is coupled to the first remote radio head through the shared network. The cascaded chain of remote radio heads is coupled to the shared network. The second remote radio head is configured to receive signals from the second set of antennas and communicate the signals to the first remote radio head. The first remote radio head is configured to receive signals from the first set of antennas, receive signals from the from the second remote radio head, and transmit the signals to the base band unit. The base band unit, the first remote radio head, and the second remote radio head communicate through a digital radio interface. The optical node is configured to communicate signals between the backhaul network and data subscribers accessing the shared network.09-29-2011
20120087672OPTICAL REPEATER SYSTEM - The present invention relates to an optical relay system that transmits a band-limited multi-band frequency signal via an optical line. A base station interface unit combines a plurality of band-limited wireless signals into one wireless signal, and an optical distribution unit converts the combined wireless signal into an optical signal and optically transmits it to a remote unit. Therefore, the number of optical modules and optical cores used for optically transmitting a wireless signal can be reduced, so that the signal noise ratio (SN) of the system can be improved, equipment can be miniaturized, and manufacturing cost can be reduced.04-12-2012
20120288283VERSATILE REMOTE CONTROL DEVICE AND SYSTEM - A radio-frequency (RF) remote control (11-15-2012
20120288282FULLY PHOTONIC WIRELESS BROADBAND BASE STATION - The invention relates to base stations in communication networks. In more particular the invention relates to cellular base stations such as 3G/4G and WLAN base stations. Some or all of the aforementioned advantages of the invention are accrued with a fully photonic base station (11-15-2012
20130011143NETWORK COMBINING WIRED AND NON-WIRED SEGMENTS - A network (01-10-2013
20110150485Photonic RF Frequency Conversion - Devices and techniques for frequency conversion of radio frequency (RF) or microwave signals based on photonic processing.06-23-2011
20130022358OPTICAL TIME-DELAYED WAVELENGTH CONVERTER - There is described a method for converting the wavelength of a pulsed optical signal. An input pulsed signal containing information and having an input wavelength is buffering by propagating the input pulsed signal in a closed-loop optical regenerative cavity. The propagation comprises converting the input pulsed signal at the input wavelength to a buffer pulsed signal at an adjustable wavelength and propagating the buffer pulsed signal within the cavity. The adjustable wavelength is set to a buffer wavelength different from the output wavelength and the buffer pulsed signal contains the information encoded in the input pulsed signal. The output wavelength is determined from the information encoded in the input pulsed signal. Upon determination of the output wavelength, the adjustable wavelength of the buffer pulsed signal is set to the output wavelength in order to; outputting the buffer pulsed signal at the output wavelength from the cavity.01-24-2013
20130170840Hybrid Multi-Band Communication System - A communication system includes a hybrid signal transmitter incorporating a signal routing circuit and a driver circuit. The signal routing circuit is configured to receive a first input signal and route the first input signal through a first signal path when the frequency bandwidth of the input signal is lower than a threshold frequency and through a second signal path when the frequency bandwidth exceeds the threshold frequency. The second signal path includes a frequency down-converter circuit. The driver circuit is configured to receive the routed input signal via the first signal path or the second signal path, and convert the routed input signal into an optical signal for coupling into an optical fiber.07-04-2013
20130177319PHASED ANTENNA ARRAY WITH ELECTRO-OPTIC READOUT CIRCUIT WITH MLL AND RELATED METHODS - A phased antenna array includes an array of antenna elements, and an electro-optic (EO) readout circuit coupled to the array of antenna elements. The EO readout circuit includes a mode locked laser (MLL) configured to generate an optical carrier signal comprising beam carrier wavelengths, an EO modulator configured to modulate a signal from an antenna element based upon the optical carrier signal, and an optical-to-electrical converter coupled downstream from the EO modulator and the MLL.07-11-2013
20130177320MULTI-LASER TRANSMITTER OPTICAL SUBASSEMBLY FOR OPTOELECTRONIC MODULES - A multi-laser transmitter optical subassembly may include N number of lasers, where each laser is configured to generate an optical signal with a unique wavelength. The transmitter optical subassembly may further include a focusing lens and a filter assembly. The filter assembly may combine the optical signals into a combined signal that is received by the focusing lens. The filter assembly may include N−1 number of filters. Each of the filters may pass at least one of the optical signals and reflect at least one of the optical signals. The filters may be low pass filters, high pass filters, or a combination thereof.07-11-2013
20130177321Balloon Network with Free-Space Optical Communication between Super-Node Balloons and RF Communication between Super-Node and Sub-Node Balloons - Exemplary embodiments may involve hierarchical balloon networks that include both optical and radio frequency links between balloons. An exemplary network system may include: (a) a plurality of super-node balloons, where each super-node balloon comprises a free-space optical communication system for data communications with one or more other super-node balloons and (b) a plurality of sub-node balloons, where each of the sub-node balloons comprises a radio-frequency communication system that is operable for data communications. Further, at least one super-node balloon may further include an RF communication system that is operable to transmit data to at least one sub-node balloon, where the RF communication system of the at least one sub-node balloon is further operable to receive the data transmitted by the at least one super-node balloon and to transmit the received data to at least one ground-based station.07-11-2013
20080219670RoF system providing HD wireless communication service and signal control method for the same - Disclosed is an RoF system providing an HD wireless communication service. The RoF system includes the base station for transmitting and receiving each of the TDD/FDD individual signals and TDD/FDD combined signals, channel-combining downstream signals for a TDD scheme with downstream signals for an FDD scheme, and generating TDD/FDD mode control signals; a base station donor for receiving downstream RF signals from the base station, converting the resultant signals into downstream optical signals, outputting the converted signals, and delivering upstream optical signals, which are input to the remote station from the wireless terminals, to the base station; and the remote station for switching a corresponding duplexing mode operation according to wireless service channel states of the wireless terminals, converting the downstream optical signals transmitted from the base station donor into service RF signals, amplifying the converted service RF signals, and providing the amplified service RF signals to the wireless terminals through antennas.09-11-2008
20130114964DEVICE FOR TRANSMITTING DATA BETWEEN TWO RAILWAY VEHICLES USING OPTICAL RADIO RELAY - The invention relates to a device (05-09-2013
20130114963SOFT HAND-OFF AND ROUTING DATA IN A VIRTUALIZED DISTRIBUTED ANTENNA SYSTEM - In some embodiments of the invention, a system for managing resource use in a Distributed Antenna System is provided. The system may include: a plurality of Digital Remote Units (DRUs) configured to send and receive wireless radio signals; a plurality of sectors, each configured to send and receive wireless radio signals; and a plurality of inter-connected Digital Access Units (DAUs), each configured to communicate with at least one of the DRUs via optical signals, and each being coupled to at least one of the sectors.05-09-2013
20130121703DISTRIBUTED ANTENNA SYSTEM FOR WIRELESS NETWORK SYSTEMS - A distributed antenna system is provided for communicating with a plurality of base stations. The distributed antenna system includes a system controller and a master unit communicating with at least one of the plurality of base stations. A remote unit communicates over a high data rate media with the master unit and/or a downstream remote unit. Alternatively, the distributed antenna system includes a controller and a digital time/space crosspoint switch controlled by the controller. A digitizing transceiver is in communication with the digital time/space crosspoint switch. The crosspoint switch is configured to transmit and receive digital data through the digitizing transceiver.05-16-2013
20110268450CROSS-TALK REDUCTION IN A BIDIRECTIONAL OPTOELECTRONIC DEVICE - A bidirectional optoelectronic device comprises a photodetector, a light source, and a drive circuit for the light source. The light source has first and second electrical leads for receiving an input electrical signal, and the drive circuit can be arranged to apply first and second portions of the input electrical signal to the first and second electrical leads, respectively, wherein the second portion of the input electrical signal is a scaled, inverted substantial replica of the first portion of the input electrical signal. A protective encapsulant can be applied that includes hollow dielectric microspheres to reduce electrical cross-talk, and that can further include an optical absorber to reduce optical cross-talk. A waveguide substrate of the device can include light collector(s) or trap(s) for redirecting and attenuating portions of optical signals propagating in waveguide layers on the substrate but not guided by a waveguide.11-03-2011
20110268449Sectorization in Distributed Antenna Systems, and Related Components and Methods - Embodiments disclosed provide sectorization in distributed antenna systems, and related components and methods. The antenna units in the distributed antenna systems can be sectorized. In this regard, one or more radio bands distributed by the distributed antenna systems can be allocated to one or more sectors. The antenna units in the distributed antenna systems are also allocated to one or more sectors. In this manner, only radio frequency (RF) communications signals in the radio band(s) allocated to given sector(s) are distributed the antenna unit allocated to the same sector(s). The bandwidth capacity of the antenna unit is split among the radio band(s) allocated to sector(s) allocated to the antenna unit. The sectorization of the radio band(s) and the antenna units can be configured and/or altered based on capacity needs for given radio bands in antenna coverage areas provide by the antenna units.11-03-2011
20110222860METHOD AND APPARATUS FOR GENERATING A REFERENCE SIGNAL LEVEL AND FOR CANCELLING AMPLIFIER OFFSET IN AN OPTICAL SYSTEM - Described is a method and apparatus for generating a mid-level reference signal and for cancelling amplifier offset in an optical communication system without DC-balancing of optical data. The apparatus comprises an optical-to-electrical converter to receive an optical signal and to generate an electrical signal; an amplifier to receive the electrical signal and to generate an output signal based on a reference signal; a feedback mechanism to be enabled during a training phase only and to generate a control signal from the output signal; and a counter logic having a digital-to-analog converter to generate the reference signal based on the control signal.09-15-2011
20130148973TRANSCEIVER AND INTERFACE FOR IC PACKAGE - An interconnect system including a host circuit board; an IC package connected to the host circuit board and including a first connector, an IC circuit board, and an IC die; and a transceiver arranged to mate with the first connector so that at least some electrical signals transmitted to and from the IC die are transmitted only on or through the IC circuit board.06-13-2013
20100316388HDMI TMDS Optical Signal Transmission Using PAM Technique - An HDMI interconnect arrangement is presented that performs a pulse-amplitude modulation (PAM) conversion of the TMDS audio/video signals in order to simultaneously transmit all three channels over a single optical fiber. The set of three audio/video TMDS channels is applied as an input to a PAM-8 optical modulator, which functions to encode the set of three channels onto an optically-modulated output signal. The modulated optical signal is thereafter coupled into an optical fiber within an active HDMI cable and transmitted to an HDMI receiver (sink). The TMDS CLK signal is not included in this conversion into the optical domain, but remains as a separate electrical signal to be transmitted along a copper signal path within the active HDMI cable.12-16-2010
20130156436TERAHERTZ RECEIVER AND METHOD OF RECEIVING TERAHERTZ BAND SIGNAL THEREOF - The inventive concept relates to a terahertz receiver. The terahertz receiver of the inventive concept includes a plurality of terahertz detectors detecting signals of terahertz band from received signals; a plurality of optical signal processing parts converting the detected terahertz signals into optical signals; an optical combiner combining the converted optical signals into one optical signal; a photodiode converting the combined optical signal into an electrical signal; and an amplifier amplifying the electrical signal.06-20-2013
20120281986MULTI-FREQUENCY DUAL-USE SYSTEM - The present invention relates to the dual-use of radiation, for example, but not limited to, visible or infrared light, for both a conventional application, e.g., illumination, combined with the additional or “dual-use” application of transmitting information without wires.11-08-2012
20130156437TERAHERTZ TRANSMITTER - Disclosed is a terahertz transmitter which includes a photonics oscillator configured to generate two optical signals with different wavelength and strong correlation; a modulator configured to modulate the optical signals; a pre-amplifier configured to amplify the modulated optical signals; a photomixer configured to generate a terahertz signal through photomixing of the amplified optical signals; and a post-amplifier configured to amplify the terahertz signal and to transmit the amplified terahertz signal through an antenna.06-20-2013
20130121702TRANSMITTER OPTICAL MODULE - Disclosed is a transmitter optical module which includes a first package generating an optical signal; a second package bonded with the first package by using chip-to-chip bonding, having a silicon optical circuit platform structure, and amplifying the optical signal; and an optical waveguide forming a transmission path of the optical signal from the first package to the second package.05-16-2013
20130188961HYBRID SYSTEM FOR DISTRIBUTING BROADBAND WIRELESS SIGNALS INDOORS - The invention relates to a system (07-25-2013
20080304831Mesh free-space optical system for wireless local area network backhaul - In wireless local area networks (WLANS) with a large number of access points, the provisioning and capacity of the WLAN backhaul network connecting the access points to a core network becomes a major issue in network design. Some network services call for access points to be deployed in high densities in a wide range of environments, including outdoor environments. Traditional backhaul networks using fixed media such as twisted pair cable, coax cable, or optical fiber, in many instances are not physically or economically viable. Disclosed are method and apparatus for connecting access points via a mesh network using free-space optical links. The free-space optical links may be supplemented with mm-wave links to increase reliability and capacity.12-11-2008
20120027415BURST MODE OPTICAL MEDIA CONVERTER WITH FAST ANALOG CONVERSION - A media converter for interfacing an optical fiber bus to an electrical interface of an electronic device is described. The media converter includes an interface circuit configured to convert electrical signals received from a transmitting channel of the electrical device in a voltage doublet format to positive logic electrical pulses and convert received electrical signals for application to a receiving channel of the electrical device from positive logic electrical pulses to a voltage doublet format, a DC coupled receiver comprising an optical interface operable for receiving optical signals from the optical fiber data bus, the receiver operable for converting the optical signals to positive logic electrical pulses for application to the interface circuit, a laser diode operable to transmit optical signals onto the optical bus, and a laser diode driver operable for receiving the positive logic electrical pulses from the interface circuit and converting the electrical signals to signals compatible for operating the laser diode.02-02-2012
20130195466TRANSMISSION METHOD AND TRANSMISSION SYSTEM - There is provided a transmission method including transmitting a first signal and a second signal, which is generated in a different manner from the first signal, via one transmission path having a solid-state element.08-01-2013
20130195467DISTRIBUTED ANTENNA SYSTEM FOR MIMO SIGNALS - A distributed antenna system includes a master unit configured to receive at least one set of multiple input multiple output (MIMO) channel signals from at least one signal source. The master unit is configured to frequency convert at least one of the MIMO channel signals to a different frequency from an original frequency, and combine the MIMO channel signals for transmission. An optical link couples the master unit with a remote for transceiving the MIMO channel signals. The remote unit is configured to receive the MIMO channel signals to be transmitted over antennas and includes an extension port configured to transceive at least one of the MIMO channel signals. An extension unit is coupled to the remote unit and is configured to frequency convert at least one of the first and second MIMO channel signals from the different frequency back to an original frequency for transmission over an antenna.08-01-2013
20120033978OPTICAL MEMORY EXPANSION - Various embodiments of the present invention are directed to optical-based methods and expansion memory systems for disaggregating memory of computer systems. In one aspect, an expansion memory system comprises a first optical/electronic interface in electrical communication with a processor, a memory expansion board configured with memory, and a second optical/electronic interface attached to the memory expansion board. The first interface converts optical signals into electronic signals that are sent to the processor and converts electronic signals produced by the processor into optical signals. The second interface converts optical signals into electronic signals that are sent to the memory and converts electronic signals produced by the memory into optical signals. The optical signals are exchanged between the first and second interfaces. Embodiments also include methods for sending and receiving data in an expansion memory system.02-09-2012
20120294621BI-DIRECTIONAL, COMPACT, MULTI-PATH AND FREE SPACE CHANNEL REPLICATOR - An apparatus for simulating radio frequency (RF) signal propagation characteristics in a wireless communication network is disclosed. The apparatus includes a set of optical modulators in electrical communication with corresponding ones of a set of RF terminals. A set of optical demodulators is in optical communication with corresponding ones of the set of optical modulators and corresponding ones of the set of RF terminals. A set of optical delay lines may be configured to be in optical communication with the corresponding ones of the set of optical modulators and the corresponding ones of the set of optical demodulators.11-22-2012
20130202305METHOD AND APPARATUS FOR PROVIDING RADIO FREQUENCY PHOTONIC FILTERING - A method and apparatus for providing RF-photonic filtering link. Specifically, one embodiment is an apparatus comprising a radio frequency (RF)-photonic filter for filtering an RF signal, where the RF-photonic filter comprises a loop comprising an electro-optical modulator, an optical fiber, a photo detector. Another embodiment is a method of operating an RF-photonic filter comprising applying a reference signal to the RF-photonic filter; selecting a reference frequency for the RF-photonic filter upon the RF-photonic filter locking to the reference frequency, disconnecting the reference signal; and applying an RF input signal to the RF-photonic filter to lock the RF input signal to the RF-photonic filter.08-08-2013
20130202307PHASED ANTENNA ARRAY INCLUDING A PLURALITY OF ELECTRO-OPTICAL CIRCUITS SPACED APART FROM AND COUPLED TO A PLURALITY OF ANTENNA CIRCUITS AND ASSOCIATED METHODS - A phased antenna array includes a plurality of electro-optic (EO) circuits. Each EO circuit has a digital-to-analog converter (DAC) configured to receive a baseband signal, and an optical source configured to generate an optical signal. Each EO circuit also has an EO modulator coupled downstream of the DAC and to the optical source and configured to modulate an optical carrier signal based upon the baseband signal and the optical signal, and an optical combiner coupled downstream of the EO modulator and coupled to the optical source. In addition, there are a plurality of antenna circuits spaced apart from the plurality of EO circuits, each antenna circuit comprising at least one photodiode and an antenna element coupled thereto. Moreover, a plurality of optical fibers couple the plurality of EO circuits to the plurality of antenna circuits.08-08-2013
20130202306PHASED ANTENNA ARRAY INCLUDING A PLURALITY OF ELECTRO-OPTICAL CIRCUITS WITH AN ELECTRO-OPTICAL MODULATOR AND ASSOCIATED METHODS - A phased antenna array includes a plurality of electro-optic (EO) circuits. Each EO circuit has a digital-to-analog converter (DAC) configured to receive a baseband signal, and an optical source comprising an optical source electro-optical (EO) modulator and configured to generate an optical signal. Each EO circuit also has an EO modulator coupled downstream of the DAC and to the optical source and configured to modulate an optical carrier signal based upon the baseband signal and the optical signal, and an optical combiner coupled downstream of the EO modulator and coupled to the optical source. In addition, there are a plurality of antenna circuits spaced apart from the plurality of EO circuits, each antenna circuit comprising at least one photodiode and an antenna element coupled thereto. Moreover, a plurality of optical fibers couple the plurality of EU circuits to the plurality of antenna circuits.08-08-2013

Patent applications in class HYBRID COMMUNICATION SYSTEM (E.G., OPTICAL AND RF)

Patent applications in all subclasses HYBRID COMMUNICATION SYSTEM (E.G., OPTICAL AND RF)