Entries |
Document | Title | Date |
20080212974 | Electromagnetic Transmission/Reception System - An electromagnetic transmission and reception system comprises a transmitter section and a receiver section. The transmitter section has a first signal source, a second signal source at a lower frequency than the first signal source, and means for generating from the first and second signal sources a plurality of signals with fixed frequency spacing derived from the second signal source frequency. One or more pairs of the plurality of signals are selected, and for the or each pair, the signals of the pair are combined to derive an output signal having a frequency derived from the difference between the frequencies of the signals of the pair. The receiver section combines a received signal, which comprises a received version of the output signal, with a local oscillator signal for frequency down-conversion of the received signal. This local oscillator signal is generated by the transmitter section. This provides a system in which the generation of signals of the desired frequency is achieved by mixing signals of specific frequencies. The reception uses frequency down-conversion using the same signal sources as used for the transmission. This enables a low noise system to be implemented. | 09-04-2008 |
20080212975 | INTERCONNECTION NETWORK BETWEEN SEMICONDUCTOR STRUCTURES, INTEGRATED CIRCUIT AND METHOD FOR TRANSMITTING SIGNALS - The invention relates to an interconnection network and an integrated circuit and a method for manufacturing the same. Furthermore, the invention relates to a method for signal transfer between semiconductor structures. The invention is characterized in that a signal of a first semiconductor structure is supplied to a transmitter, which generates from the signal a plasmon wave, and couples the latter into a waveguide. The plasmons fed through the waveguide are received by a receiver, converted to an electric signal and forwarded to a second semiconductor structure. | 09-04-2008 |
20080219675 | APPARATUS AND METHOD FOR LIGHT INTENSITY MODULATION AND OPTICAL TRANSMISSION SYSTEM EMPLOYING THE SAME - A multilevel light intensity modulation system can generate a multilevel modulated optical signal from a single light source without handling multilevel electrical signals. The light from a light source | 09-11-2008 |
20080219676 | Transmitting device, receiving device, and optical communication method - A receiving device includes a light-receiving unit receiving a light transmitted from a light source, luminance of the light changing corresponding to an information, the light-receiving unit having a plurality of light-receiving elements detecting the light repeatedly at times different from one another, and a decoding unit decoding a light-receiving signal outputted from the light-receiving unit into the information. | 09-11-2008 |
20080232815 | Dpsk Modulation-Demodulation Method, and Optical Communication Device and Optical Communication System Using the Same - In the optical communication device and the optical communication system using DPSK modulation whose cost is low, whose size is small and whose power consumption is low, the N:1 multiplexer | 09-25-2008 |
20080247763 | CHIRPED LASER WITH PASSIVE FILTER ELEMENT FOR DIFFERENTIAL PHASE SHIFT KEYING GENERATION - A method for generating D-N-PSK optical signals is disclosed wherein a laser is modulated to generate optical signal pairs including phase modulated and fixed phase portions, the phase modulated portions having a frequency encoding one or more data symbols and the fixed phase portion having a carrier frequency and a phase corresponding to the immediately preceding phase modulated portion. The output of the laser is passed through an optical spectrum reshaper having a transmission function chosen to attenuate a plurality of the phase modulated portions relative to the fixed phase portions. The phase modulated portions may have N frequency levels located on either side of the carrier frequency. One of the N frequency levels may be equal to the carrier frequency. | 10-09-2008 |
20080260391 | Optical communication apparatus and optical communication method - An optical communication apparatus is disclosed. The optical communication apparatus includes a light transmission section, a light reception section, and a control section. The light transmission section causes a light emitting portion which outputs light in a visual line direction of a user to transmit information. The light reception section causes a light receiving portion which receives light from the visual line direction of the user to receive information. The control section determines whether or not another optical communication apparatus is an information communication target based on identification information when the light reception section has optically received communication request information and the identification information from the other optical communication apparatus and causes the light transmission section to optically transmit communication response information to the other optical communication apparatus when the control section has determined that the other optical communication apparatus be the information communication target. | 10-23-2008 |
20080260392 | ILLUMINATOR INCLUDING OPTICAL TRANSMISSION MECHANISM - An illuminator including an optical transmission mechanism includes a transmission-side electric circuit for forming electric signals modulated in response to information, a light source for emitting intensity-modulated light in response to the electric modulated signals, optical wavelength conversion means including fluorescent material for converting part of the intensity-modulated light into illumination light, photoelectric conversion means for receiving another part of the modulated light and converting this part into reproduced electric modulated signals and a receiving-side electric circuit for reproducing the information from the reproduced electric modulated signals. | 10-23-2008 |
20080279562 | Transmitter, Receiver, Communication System, Communication Method, Communication Program - A communication system includes a transmitter and a receiver that establish mutual connections of a plurality of their communication layers for communication. The transmitter has a request generating part for generating a connection request including data and commands required to connect the plurality of adjacent communication layers, and a request transmitting part for transmitting the connection request to the receiver. The receiver has a request receiving part for receiving the connection request from the transmitter, and a connection establishing pant for extracting the data and commands from the connection request and establishing, based on the extracted data and commands, the connections of the communication layers. In this way, the time required for establishing the connections can be shortened. Thus, even if a data exchange is interrupted, a reconnection can be made in a short time to resume the data exchange. | 11-13-2008 |
20080285979 | HIGH-SPEED OPTICAL COMMUNICATION - A high-speed optical communication system for transmitting and receiving an optical signal is disclosed. A contents receiver transmits previously given unique identification information by using a light less intensive than the intensity level of a pre-given threshold. When a contents transmitter receives the identification information transmitted from the contents receiver, it transmits contents data to the receiver by using a laser. | 11-20-2008 |
20080317476 | Vehicle-Mounted Optical Communication System and Vehicle-Mounted Optical Transmitter - A vehicle-mounted optical communication system, which uses an optical signal to perform data transmission, comprises a first optical transmitter and an optical receiver. The first optical transmitter, which is mounted on a vehicle, has a multiple quantum well structure, in which an active layer has a quantum well layer of In | 12-25-2008 |
20090016735 | Optelectronic sensor - An optoelectronic sensor includes at least one light transmitter for the transmission of light signals into a monitored zone, at least one light receiver for the reception of light signals transmitted from the light transmitter and a control device for the generation and/or influencing of the light signals and for the generation of an object detection signal in the case of the presence of an object in the monitored region in dependence on the output signals of the light receiver. In this connection, the light signals transmitted into the monitored zone by the light transmitter are each generated by an output signal modulated in accordance with the spread spectrum method using a random pseudo-noise code. | 01-15-2009 |
20090060520 | REDUNDANCY AND INTEROPERABILITY IN MULTI-CHANNEL OPTOELECTRONIC DEVICES - A multi-channel optoelectronic device is configured to establish a redundant status link with a remote device. The optoelectronic device can transmit N transmit optical signals to the remote device over a plurality of transmit channels and receive N receive optical signals from the remote device over a plurality of receive channels. The optoelectronic device includes one or more spare transmit and receive channels. When used with a remote device having spare transmit and receive channels, each device can establish a status link with the other and use the status link to switch out transmit and/or receive channels to identify and permanently switch out the worst transmit and/or receive channels. Alternately, the device can interoperate with a non-status-link enabled remote device by determining that the remote device is not status-link enabled, transitioning to a low transmit power mode, and transmitting and receiving over a plurality of default transmit and receive channels. | 03-05-2009 |
20090060521 | METHOD, SYSTEM AND DEVICE FOR DATA TRANSFER IN AN OPTICAL NETWORK - A method for data transfer in an optical network, including: amplitude modulating, by a central office, an optical carrier by a downstream data with a first rate to generate a downstream optical signal carrying the downstream data; sending the downstream optical signal to a user terminal; obtaining, by the user terminal, the downstream data from the downstream optical signal; amplitude modulating, by the user terminal, the downstream optical signal by an upstream data with a second rate to generate an upstream optical signal, wherein the ratio of the first rate to the second rate is greater than 1; sending the upstream optical signal to the central office; and receiving, by the central office, the upstream optical signal, and obtaining, by the central office, the upstream data from the upstream optical signal. Furthermore, the present invention discloses a system and device for data transfer in the optical network. With the invention, the complexity of the system may be effectively reduced, and the cost of the device may be lowered. | 03-05-2009 |
20090080898 | Method and apparatus for reducing noise in a fiber-optic sensor - An optical detection system includes an optical transmit-receive system, an optical conduit in optical communication with the optical transmit-receive system, and an optical sensor in optical communication with the optical conduit. The optical transmit-receive system provides pulsed optical signals to the optical sensor by way of the optical conduit that have a maximum pulse width of about 100 nanoseconds and further have a maximum pulse width that is less than a maximum distance of reflection of the pulsed optical signals in the optical detection system to decrease false alarms. | 03-26-2009 |
20090080899 | FIBER OPTIC GPS LINK - A fiber optic GPS signal device and method comprising a VCSEL multimode transmitter having a gain that, together with the GPS antenna gain, is greater than the VCSEL multimode transmitter noise. When in operative communication, via a long length of multimode fiber, i.e., up to 2000 feet and greater, with a fiber optic receiver, the GPS signals are transmitted at, inter alia, L1 and L2 frequencies with minimal degradation over the length of multimode fiber. The present invention may be used in a variety of GPS transmission applications requiring long lengths of cabling. For example, the invention is particularly useful when the GPS antenna is located on top of an office building or cell phone tower and remotely from the GPS receiver and for use in high-volume commercial telephone synchronizing (DTMF) applications. | 03-26-2009 |
20090087189 | NON-INTERFERING TRANSMITTED-BEAM PAIRS - Embodiments include apparatus, methods, and system including an apparatus comprising a photo receiver operable to detect a stream of light pulses transmitted from a photo transmitter paired with the photo receiver, wherein a frequency of the stream of light pulses has a harmonic relationship with a frequency of at least one other stream of light pulses transmitted by a photo transmitter not paired to the photo receiver, wherein the stream of light pulses from the transmitter paired with the photo receiver is detectable by the photo receiver even when the photo receiver is receiving one or more light pulses from the at least one other stream of light pulses. | 04-02-2009 |
20090097859 | EMITTER, CONVERTER, AND DISPLAY SYSTEM USING SAME - A display system includes an emitter and a converter. The emitter is used for emitting invisible light rays carrying to-be-displayed information. The converter is used for receiving the invisible light rays and converting the invisible light rays to be visible light rays, and emitting the visible light rays carrying the to-be-displayed information. The emitter includes an information source for generating display data from the to-be-displayed information, an encoder for encoding the display data to generate data packages, and an invisible light source for emitting the invisible light rays and modulating the data packages into the invisible light. An encoder and a converter are also disclosed. | 04-16-2009 |
20090103928 | Communicating or reproducing an audible sound - The present invention relates to the communication or reproduction of sound, in particular audible sound. There is provided a method of communicating a sound, including the steps of: transmitting, onto an optical link, pairs of signal copies, the signal copies of a given pair having a time offset relative to one another; applying the audible sound to the optical link, such that the audible sound causes a phase modulation to the transmitted signal copies; receiving modulated signal copies previously transmitted onto the link; and, for received pairs of signal copies, causing one signal copy of a pair to mix with the other signal copy of that pair so as to produce a signal representative of the sound. The sound is an audible sound. It has been found that a delay of at least 75 micro seconds allows for a better reproduction of audio sounds, since these have a relatively low frequency content. | 04-23-2009 |
20090110407 | Dual Wiring System - A dual wiring system with improved function expandability is provided. A base unit is mounted in a wall surface of a structure, and connected to both of an electric power line and an information line previously installed in the structure. Each of function units has at least one of functions for providing electric power from the electric power line, outputting information from the information line and inputting information into the information line when connected with the base unit. The base unit is detachably connected with one of the function units by use of a joining member, so that electric power is supplied from the base unit to the function unit through a power transmission means, and a signal transmission between the base unit and the function unit is obtained through a signal transmission means. | 04-30-2009 |
20090116848 | OPTICAL COMMUNICATION SYSTEM AND METHOD USING MANCHESTER ENCODED SIGNAL REMODULATION - An optical communication system and method using Manchester encoded signal remodulation are provided. The optical communication system includes a transmitter generating and transmitting a Manchester encoded optical signal including a first data stream, and a receiver receiving an optical signal obtained by dividing power of the Manchester encoded optical signal into two parts and modulating one of the two parts to include a second data stream, and recovering the second data stream. In two-way communication, the optical communication system and method allow one party to generate and transmit a Manchester encoded signal (i.e., a downstream signal) to the other party and allow the other party to generate an upstream signal by modulating the optical power of the downstream signal without using a light source. | 05-07-2009 |
20090123158 | LIGHT DETECTION AND RANGING SYSTEM - A light detection and ranging system includes a mirror unit rotating around a scan axis. The mirror unit includes a receiving portion and a transmitting portion offset by an angle about the scan axis relative to a surface plane of the receiving portion. Respective centroids of the receiving and transmitting portions are positioned at a common point on the scan axis while the receiving and transmitting portions rotate around the scan axis. A transmitter transmits a light pulse toward the mirror unit. The transmitting portion is positioned to reflect the light pulse toward a target. A receiver is positioned to reflect the light pulse reflected from the target toward the receiver. The angle offset compensates for a change between a cone of illumination of the transmitting portion and a field-of-view of the receiving portion resulting from the rotation of the mirror unit. | 05-14-2009 |
20090142068 | Data Communication Apparatus, Electronic Camera, and Data Communication System - A data communication apparatus comprises a storage unit that stores network connection information required for establishing a connection via a network with an external device, a light emission element that emits light, a light emission control unit that converts the network connection information into an optical signal and emits the optical signal from the light emission element by controlling an operation of the light emission element based upon the network connection information stored in the storage unit, and a reception unit that receives data transmitted from the external device via the network. | 06-04-2009 |
20090169217 | BYTE-INTERLEAVING SYSTEMS AND METHODS FOR 100G OPTICAL TRANSPORT ENABLING MULTI-LEVEL OPTICAL TRANSMISSION - The present invention provides byte-interleaving systems and methods for Optical Transport Unit N (OTUN) (i.e. Optical Transport Unit 4 (OTU4)) and 100 Gb/s (100 G) optical transport enabling multi-level optical transmission. The byte-interleaving systems and methods of the present invention support the multiplexing of sub-rate clients, such as 10 Gb/s (10 G) clients, 40 Gb/s (40 G) clients, etc., into two 50 Gb/s (50 G) logical flows, for example, that can be forward error correction (FEC) encoded and carried on a single wavelength to provide useful, efficient, and cost-effective 100 G optical transport today. Signaling format support allows these two 50 G logical flows to be forward compatible with an evolving OTU4 and 100 G signaling format without waiting for optical and electronic technology advancement. Signaling format support also allows an evolving standard 100 G logical flow (i.e. OTU4, 100 Gb/s Ethernet (100 GbE), etc.) to be carried as 2×50 G logical flows, 4×25 G logical flows, or other lower rate formats on a single wavelength. | 07-02-2009 |
20090180782 | APPARATUS, SYSTEM, COMPUTER PROGRAM, AND METHOD FOR PROVIDING A MULTIMEDIA-OVER-COAX-ALLIANCE NETWORK IN CONJUNCTION WITH AN OPTICAL NETWORK - An apparatus, system, computer program, and method for providing a Multimedia over Coax Alliance (MoCA) (or other multimedia-over-coaxial cable technology) network in conjunction with an optical network. In example embodiments, MoCA data is communicated between network nodes in an optical signal. In other example embodiments, MoCA data, or other data, is transmitted in optical frequencies above 860 MHz. | 07-16-2009 |
20090190932 | Electronic device - An electronic device includes a casing having a laser light reception region on its outer surface, a receiver that receives transmission data from a partner device, and a suppression member that suppresses leakage of the laser light between the partner device and the electronic device. The partner device includes a laser light emission component and a laser light modulator. The receiver detects, in a state where the partner device and the electronic device are positioned in to communicable positions where the laser light from the partner device is made incident inside the light reception region of the electronic device, the laser light incident inside the light reception region and demodulates the transmission data from the laser light detection result. The suppression member is disposed in at least an area surrounding the light reception region. | 07-30-2009 |
20090202253 | Optically isolated analog audio circuits - An Audio circuit configured to receive an analog audio signal. The audio circuit includes an optical isolator having a LED configured to emit light modulated by the analog audio signal over a fiberless medium and a detector configured to replicate the analog audio signal received by the LED from the modulated light emitted from the LED. | 08-13-2009 |
20090202254 | Wide field-of-view amplified fiber-retro for secure high data rate communications and remote data transfer - An optical system for remotely optical communications at a high data rate between a base station and a remote station under atmospheric turbulence conditions is disclosed. The remote station includes an entirely different type of retroreflector that does not use the conventional type of retroreflection, but instead consists of two sets of lenslets coupled with single-mode fiber array, called fiber “retro”. Amplified retromodulation is achieved requiring only one single optical amplifier and one single modulator. A transmitter located at the base station sends an interrogating optical beam to the fiber “retro” which modulates the optical beam according to the input signal/data, and redirects the modulated optical beam to the base station for detection by a receiver. The present invention includes the capabilities of providing Identification of Friend-or-Foe (IFF), secure communication, and a means of achieving a wide field-of-view (FOV) with a fiber-coupled lenselet array. | 08-13-2009 |
20090238575 | ULTRA HIGH-SPEED ADAPTIVE AND ALL-OPTICAL METHOD FOR DATA PACKET RATE MULTIPLICATION COMPATIBLE WITH MULTIPLE DATA RATES - The present invention relates to an adaptive and all-optical method for data packet rate multiplication compatible with multiple data rates and/or multiple communication protocols. By performing a real-time pulse width compression on an original electronic or optical packet from an end user or a network interface device, the method generates an optical packet having an identical rate with the original packet while the duration of each pulse being significantly reduced. Then, by eliminating any redundant idle time due to the pulse width compression, the method also shortens data period and thus makes the rate of packet multiplied. The present invention addresses the technical problem of limited data rate in EO/OE conversion as known in the prior art and solves fundamentally the interconnection and communication between networks or systems of different data rates and/or protocols. The method of the present invention thus enables the design of an ultrahigh rate all-optical communication system and network transparent in rate and protocol. | 09-24-2009 |
20090285581 | Passive Optical Network Comprising an Optical Burst Mode Receiver - A passive optical network is disclosed that enables burst mode operation without some of the disadvantages for doing so in the prior art. An embodiment of the present invention comprises a receiver that receives optical signals from transmitters of a plurality of optical network units. For each transmission from an optical network unit, the receiver provides an output signal based on a comparison of the optical signal and a reference voltage that is specific to that optical network unit. A digital-to-analog converter generates the reference voltage in a data rate-independent manner based on information provided to it from the control plane. | 11-19-2009 |
20100040377 | Optical sensing module based on pulse width modulation signal and method thereof - A optical sensing module based on signals having pulse width modulation and a method thereof are disclosed for sensing a light source and providing an output signal having pulse width modulation. The optical sensing module comprises an optical sensor, a signal processing unit, and a duty cycle modulation unit. The signal processing unit provides a modulation control signal based on a sensing signal generated by sensing the light source from the optical sensor in conjunction with a gain control signal. The duty cycle modulation unit modulates the duty cycle of the pulse width modulation input signal to generate the pulse width modulation output signal based on the modulation control signal. The duty cycle difference between the duty cycle of the input signal and the duty cycle of the output signal is proportional to the intensity difference between the light source and a reference light source. | 02-18-2010 |
20100054752 | OPTICAL MODULE - An optical module comprises: a photoelectric conversion device; at least one of a transmitter LSI and a receiver LSI; one or more memory devices; and an input/output terminal to read and write stored information within the memory device(s). The memory device(s) further comprises: a first memory region where a predetermined driving condition for the optical module or manufacturing information and other basic data inherent to the optical module, or a driving condition or its correction factor table is recorded before shipment as an optimum driving condition for the optical module when installed in a system; and a second memory region where history information such as accumulated use time is recorded after the shipment. | 03-04-2010 |
20100080568 | Optical Swapping of Digitally-Encoded Optical Labels - A method and a device are provided for swapping optical labels in an optical communication network. Optical information, including payload data and label data digitally encoded into the optical information, is received. At least one group of bits within the optical information is selectively inverted to rewrite the label data with new label data without changing the payload data. Each of the at least one group of inverted bits includes at least two bits and all bits of each of the at least one group of inverted bits are contiguous bits. | 04-01-2010 |
20100086312 | Optoelectronic device with a built-in fuse mechanism - An optoelectronic device for transmission of an electrical signal of an input electrical current circuit to an output electrical current circuit galvanically isolated from the input electrical current circuit. The device includes a housing. The input electrical current circuit contains, for producing an optical signal, an optical transmitting unit, which is arranged in the housing. The output electrical current circuit contains, for receiving the optical signal, an optical receiving unit, which is arranged in the housing. At least one fuse mechanism is provided in the housing, which interrupts transmission of the electrical signal in the case of an electrical current flow, which lies above a predetermined electrical current level. | 04-08-2010 |
20100098428 | Optical interconnection modules for hybrid electrical-optical networks - An optical interconnection module ( | 04-22-2010 |
20100111540 | FILTER-BASED DPSK RECEIVER - A filter-based method of demodulating differentially encoded phase shift keyed (DPSK) optical signals, such as commonly used binary-DPSK (DBDPSK) and quadrature DPSK (DQPSK) signals, that can achieve optimal receiver sensitivity is described. This approach, which combines filtering and differential phase comparison, can reduce the complexity and cost of DPSK receivers by obviating delay-line interferometer-based demodulation. This can improve receiver stability and reduce size, weight, and power, while maintaining the ability to achieve optimal communications performance. | 05-06-2010 |
20100124421 | Bi-directional optical link between multiple data sources and a processing node in an avionics platform - A fiber optic link for platforms with data sources including, e.g., sensors, cameras, radars and antennas. An array of optical transmitter/receiver pairs is coupled to an integrating network of the platform. Data modules are each coupled to certain ones of the data sources and include a receiver for detecting control data, and a modulator for modulating a light signal according to signals from the module's data sources. At least one optical fiber is coupled between a given transmitter/receiver pair of the array, and a corresponding data module. A laser source associated with each transmitter supplies a light signal with the control data to a corresponding data module downstream over an optical fiber. The light signal is modulated by the signals from the module's data sources, and the modulated light signal is returned to an array receiver upstream over an optical fiber. | 05-20-2010 |
20100129084 | BI-DIRECTIONAL PARALLEL OPTICAL LINK - A system is disclosed. The system includes a first optical transceiver having a first set of transmitters and a first set of receivers and a second optical transceiver having a second set of transmitters coupled anti-symmetrically to the first set of receivers of the first optical transceiver and a second set of receivers coupled anti-symmetrically to the first set of transmitters of the first optical transceiver. | 05-27-2010 |
20100142968 | PRODUCT, METHOD AND EQUIPMENT FOR REMOTE COMMUNICATION USING CHROMOGENIC MATERIALS - The invention relates to products, methods and devices for remote communication or control using chromogenic materials. Several samples including at least one kind of chromogenic materials are simultaneously irradiated or radiated together by an appropriate entangled radiation, e.g. gamma, X, ultraviolet or visible radiation, provided by a cascade from an atomic source, or by the target of a linear particle accelerator or by a non-linear crystal. When the samples are separated, one of them, qualified as the master, is stimulated by a traditional method that uses infrared or white radiation or by heating, and a signal is measured that represents the partially correlated excess variation of opacity or coloration of the other sample(s), qualified as slave(s). There is no known method of interference between the master and the slaves. The slave(s) are the only ones capable of instantaneously receiving the signal from the master through all media and from any distance. The method and the equipment are particularly intended for communication or control applications. | 06-10-2010 |
20100166432 | CODING DEVICE, PULSE REGENERATING DEVICE, AND COMMUNICATIONS SYSTEM - It is an object of the present invention to provide coding techniques which allow for higher efficiency and easier synchronization with coded data. In order to attain the object, a coding device according to the present invention converts 2-bit informational data into 4-bit coded data according to a predetermined coding rule. According to the coding rule employed in the coding device, one of four possible kinds of bit strings of informational data is converted into alternately a bit string of four bits in which each of values of two successive bits is “1” and a bit string of four bits in which each of values of all bits is “0”. Then, the other kinds of bit strings are converted into bit strings of four bits which differ from one another, in each of which a value of only one bit is “1”. | 07-01-2010 |
20100172652 | FIBER OPTIC TRANSCEIVER (FOT) MODULE AND METHOD FOR MANUFACTURING AN FOT MODULE - A fiber optic transceiver (FOT) module is provided that has a circuit board attached to the FOT leadframe. The circuit board, which is typically a printed circuit board (PCB), provides several advantages over typical FOT module designs in that it provides additional surface area for mounting additional components, enables components to be moved from the motherboard into the module, allows the I/O pin count of the FOT module to be increased without increasing the width or footprint associated with the module, allows bond wires to be shortened, provides improved performance over changes in temperature, allows manufacturing yield to be improved, and enables improvements in signal integrity to be realized. | 07-08-2010 |
20100209113 | LIGHT TRANSMITTING AND RECEIVING MODULE, AND METHOD FOR MANAGING THE SAME, LIGHT TRANSMITTING AND RECEIVING APPARATUS, AND WAVELENGTH-MULTIPLEXING LIGHT TRANSMITTING AND RECEIVING APPARATUS - The light transmitting and receiving module includes a light outputting section; alight receiver which receives input light and which outputs an electric signal having an intensity corresponding to a light intensity of the input light; a first variably attenuation controller which variably attenuates the light output from the light outputting section; a second variably attenuation controller which variably attenuates the input light to the light receiver; a first switch which selectively switches a path through which the light from the first variably attenuation controller is output between a light transmitting path and an alternative path different from the light transmitting path; and a second switch which selectively switches light to be output to the second variably attenuation controller between light from an external entity and the light through the alternative path of the first switch. | 08-19-2010 |
20100247107 | Method and Apparatus for Increasing the Capacity of A Data Communication Channel - Method for efficiently increasing the capacity of an optical channel which can operate in a given data rate B, by generating N modulated data streams with a bit rate of B/N and a bit-time of N/B at the transmission end, to be simultaneously transmitted from a transmission end to a receiving end of the channel. A shift of 1/B*N between the first modulated data stream and each of its N−1 subsequent modulated data streams is generated using time delay or phase shifting and then the first modulated data stream and its shifted subsequent modulated data streams are combined into a composite multilevel signal with up to N levels and the composite multilevel signal is transmitted to a receiving end of the channel. At the receiving end, the composite multilevel signal is sampled N times during each bit-time, in order to obtain a vector with N elements at each time, such that each element has N+1 possible values and corresponds to the order of a sample. Each of the N modulated data streams are reconstructed by vectorial MLSE, preformed for each element by calculating the joint conditional PDF. | 09-30-2010 |
20100247108 | Infrared communication system, movable object, supply facility, and method for infrared communication in the same - A supply facility supplies fluid to a movable object through a feed pipe connected with a connection port of the movable object. A feed connector of the feed pipe is rotatable around its axis when the feed pipe is connected with the connection port. At least one of the feed pipe of the supply facility and the movable object has multiple infrared communication elements. When the feed connector of the feed pipe is connected with the connection port of the movable object, at least one of the infrared communication elements is communicable with an infrared communication device on the other side via an infrared communication, regardless of the rotation phase. | 09-30-2010 |
20100272444 | Code Grouping for Optical Networks - The invention is directed to code labeling in an optical network. The network includes a transmitting station operable to transmit an optical signal. The network also includes an encoder coupled to the transmitting station operable to label the optical signal composed of a group of codes. A receiving station operable to receive the labeled group of optical codes is also provided. The receiving station is operable to read the optical signal if the label of the received group of codes corresponds to the group of codes assigned to the receiving station. | 10-28-2010 |
20100278540 | SYSTEM, DEVICE, AND METHOD FOR SUPPORTING CUT-THROUGH PATHS IN AN OPTICAL COMMUNICATION SYSTEM - A system, device, and method for supporting cut-through pats in an optical communication system involves obtaining hop count and quality of service information by an initiating device and using the hop count and quality of service information by the initiating device to make decisions relating to a cut-through path. The hop count and quality of service information is provided in a reply message that is sent by a terminating device and modified by intermediate devices between the initiating device and the terminating device. The terminating device sends the reply with a hop count equal to one and quality of service information for a first link (hop) toward the initiating device. Each intermediate device increments the hop count in the reply and adds quality of service information for a next link (hop) into the reply. | 11-04-2010 |
20100316390 | TECHNOLOGY FOR PROVIDING TELECOMMUNICATION SERVICES TO MULTIPLE OPTICAL COMMUNICATION LINES - A system for serving N optical communication lines by a redundant set of modules in an optical network; where the set of modules comprises N>1 main modules and one backup module, N optical splitters, 2N fiber connections and a control means. In the system, each of the N optical splitters is connected to two different modules of the set by two respective fiber connections out of the 2N connections, while each of the N optical splitters is also coupled to one of the N optical communication lines. The arrangement is such that the control means selectively activates/inactivates any of the fiber connections for respectively enabling/blocking transfer of data there-along; the control means thus ensures that each specific line of the N optical communication lines is always served by either one or another of two different modules. | 12-16-2010 |
20110002693 | DIGITAL SIGNAL PROCESSING OPTICAL TRANSMISSION APPARATUS - In a digital signal processing optical transmission apparatus such as a predistortion or OFDM type one, optical transmission at a stable S/N ratio is intended to be able to be made by controlling an output of an optical transmission signal with fixed average power, even if a peak to average power ratio of the optical transmission signal changes. The apparatus is provided with an average power calculation unit ( | 01-06-2011 |
20110008054 | MODULATOR AND DEMODULATOR FOR A DIFFERENTIAL OPTICAL MODULATION FORMAT WITH EIGHT PHASE CHANGES - The invention relates to a system comprising an optoelectronic modulator device and demodulator device for establishing communication between optical communication systems by means of differential modulation with eight phase changes. Said system can increase the information transmission capacity by up to three times that of a system with two phase changes. The modulation formats transmittable by the system are called: NRZ-D8PSK, RZ-D8PSK, D8PSK. The invention also relates to the design of the modulator which is formed by a differential modulation precoder and optical signal phase modulators, in which the signals leaving the precoder control the phase modulators in order to perform differential modulation with eight phase changes in relation to the optical signal originating from a semiconductor laser. The invention further relates to the design of a demodulator positioned at the terminal end of the communication system, formed by three receiver branches each containing different electronic devices used for the electronic processing of the signals received. | 01-13-2011 |
20110038639 | POWER-UP OF DEVICE VIA OPTICAL SERIAL INTERFACE - An optical communication serial interface is employed to power up a device from a powered down state to a powered on state. An optical receiver element receives serial optical signals transmitted by at least one optical fiber and converts the received serial optical signals to electrical signals. A low level reception converter detects and decodes the electrical signals to provide data and control words from detected and decoded normal electrical signals for a high level command processor. A power supply maintains low level power to at least the optical receiver element and the low level reception converter of the optical communication serial interface while the device is in the powered down state. The low level reception converter detects a particular abnormal sequence of electrical signals; and in response to detecting the particular abnormal sequence of electrical signals, asserts a control signal to power up the device controllable power supply. | 02-17-2011 |
20110044697 | OPTICAL TELEMETRY NETWORK - An apparatus for providing communications between a first device disposed at a tubular and a second device, the tubular having tubular sections and being configured to be disposed in a borehole penetrating the earth, the apparatus including: a first optical coupler configured to be concentrically coupled to a first tubular section and configured to be in optical communication with the first device using a first optical transmission medium disposed at the first tubular section; and a second optical coupler configured to be concentrically coupled to a second tubular section and configured to be in optical communication with the second device using a second optical transmission medium disposed at the second tubular section; wherein the first optical coupler is configured to be perimetrically disposed about the second optical coupler to be in communication with the second optical coupler to provide the communications between the first device and the second device. | 02-24-2011 |
20110052203 | CONTROL UNIT HAVING A DEVICE FOR OPTICAL DATA TRANSMISSION - The invention relates to a control unit comprising a data transmission device, comprising at least one module ( | 03-03-2011 |
20110069968 | OPTICAL COMMUNICATION MODULE AND METHOD FOR MANUFACTURING THE SAME - An optical communication module includes an array semiconductor laser which emits light beams of plural wavelengths, an array lens which brings each of the light beams emitted from the array semiconductor laser to parallel light, and an array mirror which includes mirrors corresponding to the number of wavelengths and is provided at positions on which the light beams emitted from the array lens are incidentable, the respective mirrors selectively reflecting the light beams emitted from the array semiconductor laser. | 03-24-2011 |
20110076026 | Method for encoding and decoding of optical signals - The present invention refers to a method for robust multi-level encoding of optical signals. The method uses a transmitter that transforms electric signals into optical signals and a receiver capable to transform optical signals into electric signals. The transmitter is capable to generate optical pulses having at least two different durations. The amplitudes of the pulses are preferably close to each other. The transmitter is fast, and the receiver is slow such that the response time of the receiver exceeds at least the shortest of the durations of the optical pulses. Then the receiver effectively integrates the optical signal and generates the electric signal having a larger amplitude when the optical signal has a larger duration. Thus, the method converts the modulation in pulse duration into the modulation in signal amplitude. In different embodiments of the present invention, the transmitter can be realized by a light-emitting diode, superluminescent light-emitting diode, or a diode laser. The receiver can be realized by a p-i-n diode, by a resonant cavity photodetector, or by an avalanche photodiode. | 03-31-2011 |
20110110671 | Optical Networks - Improvements in or relating to Optical Networks. The invention relates to improvements in or relating to optical networks, and methods and an apparatus for providing communications services. Receiving an optical signal is described comprising a carrier wavelength and optical data. The optical data is substantially erased, and the carrier wavelength is re-modulated with user data for onward transmission of the user data. | 05-12-2011 |
20110129230 | OPTICAL TRANSMISSION APPARATUSES, METHODS, AND SYSTEMS - Apparatuses, systems, and methods are disclosed that provide for an agile coherent optical modem that can generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. An “agile coherent optical modem” [ACOM] approach to optical communications by employing a software configurable and adaptive technologies to the transport system. The ACOM generate agile RF waveforms and data rates on a generic opto-electronic hardware platform. By employing advanced communication techniques to the optical domain such as wavelength agility, waveform agility, and symbol rate agility, it is possible to enable robust optical communications. The ACOM allows for the transport capacity of a communications link to be varied, thereby accommodating variations in transport conditions, range, opacity, etc. | 06-02-2011 |
20110150496 | Time Constrained Signal MIMO Wireless and Wired Communication Method - A method and system for receiving and processing in a wireless device a Radio Frequency Identification (RFID) device generated signal and a sensor generated signal. Receiving and processing a data signal into a processed ultra narrowband (UNB) and a processed ultra wideband (UWB) signal and providing processed UNB and UWB signal to a selector for selection of UNB or UWB signal and for providing selected UNB or UWB signal to a transmitter for transmission. A transmitter and receiver having a Multiple Input Multiple Output (MIMO) antenna system. Processing a signal into a Time Division Multiple Access (TDMA) and a Code Division Multiple Access (CDMA), Time Constrained Signal (TCS) waveform shaped and Long Response (LR) filtered signal. Receiving and processing a Fiber Optic Communication (FOC) network provided signal and processing a UNB processed signal into a processed spread spectrum signal. Processing and modulating a UNB signal into a missing cycle (MCY) processed modulated signal and into a phase reversal keying (PRK) modulated signal. Processing a signal into a clock shaped signal and processing and modulating a Radio Frequency Identification (RFID) processed signal into a processed UNB phase reversal keying (PRK) modulated signal and an infrared (IR) signal processor for receiving and processing an IR generated signal used in wireless device. | 06-23-2011 |
20110158653 | Dynamic intelligent bidirectional optical access communication system with object/intelligent appliance-to-object/intelligent appliance interaction - Reduced Rayleigh backscattering effect enables a longer-reach optical access communication network-thus it eliminates significant costs. Furthermore, a wavelength to an intelligent subscriber subsystem can be dynamically varied for bandwidth on-Demand and service on-Demand. A software module renders intelligence (and context awareness) to a subscriber subsystem and an appliance. An object can sense/measure/collect/aggregate/compare/map and connect/couple/interact (via one or more or all electrical/optical/radio/electro-magnetic/sensor/bio-sensor communication network(s) within and/or to and/or from an object) with another object, an intelligent subscriber subsystem and an intelligent appliance utilizing an Internet protocol version 6 (IPv6) and its subsequent versions. | 06-30-2011 |
20110170874 | Method, system, and apparatus for optical communication - An optical communication method includes outputting an optical data signal in which a signal amplitude of a non-data area that is an area other than a data area is made higher than a signal amplitude of the data area, to a predetermined receiver, receiving an optical input including the optical data signal with the predetermined receiver, detecting each of the signal amplitude of the non-data area and the signal amplitude of the data area of the optical input, creating a threshold for encoding the data area based on the signal amplitude of the data area, determining whether the optical data signal is received, based on the signal amplitude of the non-data area, and outputting a data signal in which the data area is encoded by using the threshold of the optical data signal, when it is determined that the optical data signal is received. | 07-14-2011 |
20110206381 | OPTICAL SERIALIZING/DESERIALIZING APPARATUS AND METHOD AND METHOD OF MANUFACTURING SAME - An optical serializer/deserializer (SERDES) includes serializing circuitry which includes a source of a plurality of unmodulated optical signals, a modulation unit for generating a plurality of modulated optical signals using a plurality of electrical signals to modulate the plurality of unmodulated optical signals, and a coupling unit for delaying the plurality of modulated optical signs to generate a plurality of delayed modulated optical signals and combines the delayed modulated optical signals to generate a serialized modulated optical signal. Deserializing circuitry of the SERDES includes an optical splitter for splitting a serialized modulated optical signal into a plurality of modulated split optical signals, a demodulation unit for demodulating the modulated split optical signals and generating a respective plurality of demodulated split optical signals, and a delay unit for delaying each of the plurality of demodulated split optical signals by a respective delay amount such that the serialized modulated optical signal is converted into a respective plurality of parallel demodulated split optical signals. | 08-25-2011 |
20110211841 | Ghost Channel Management for PHB Mitigation - A system and method for managing the selection of ghost channels in an optical communication system, including components configured to collect one or more first data values indicating the validity of an optical communication channel within a first degree of a node in the optical communication system, collect one or more second data values indicating the optical power level of the optical communication channel, transmit the first and second data values to a second degree of the node, receive the first and second data values at the first degree, and aggregate the first and second data values for the first degree and the second degree at the first degree. | 09-01-2011 |
20110229146 | PHASE MODULATION APPARATUS, TRANSMITTING APPARATUS, RECEIVING APPARATUS, AND PHASE MODULATION METHOD - It is aimed to provide a phase modulation apparatus that realizes high-precision phase modulation in high-speed phase modulation of dual optical pulses. A phase modulator | 09-22-2011 |
20110243570 | METHOD AND APPARATUS FOR TRANSMITTING VISIBILITY FRAME ACCORDING TO SETTING OF SLEEP MODE IN VISIBLE LIGHT COMMUNICATION SYSTEM - An apparatus and method for determining whether to output a visibility frame by a Visibility Light Communication (VLC) device according to a setting of a sleep mode is provided. The method includes receiving a sleep mode request message; and transmitting a response message indicating a sleep mode period in response to the received sleep mode request message, wherein the response message includes information indicating at least one first window period in which data transmission and reception are stopped, information indicating at least one second window period in which data transmission and reception can be performed in a normal state, and setting information for determining whether to transmit a visibility frame during at least a period of the sleep mode period. | 10-06-2011 |
20110243571 | METHOD, APPARATUS, AND ARTICLE TO FACILITATE DISTRIBUTED EVALUATION OF OBJECTS USING ELECTROMAGNETIC ENERGY - Objects such as manufactured goods or articles, works of art, media such as identity documents, legal documents, financial instruments, transaction cards, other documents, and/or biological tissue are sampled via sequential illumination in various bands of the electromagnetic spectrum, a test response to the illumination is analyzed with respect to reference responses of reference objects. The sequence may be varied. The sequence may define an activation order, a drive level and/or temperature for operating one or more sources. Illumination may be in visible, infrared, ultraviolet, or other portions of the electromagnetic spectrum. Elements of the evaluation system may be remote from one another, for example coupled by a network. | 10-06-2011 |
20110249978 | Optical Transmitter and Optical OFDM Communication System - Distortion of a reception signal which is attributable to interference between subcarriers during photoelectric conversion is reduced in an optical OFDM communication system without broadening the signal band. A transmission signal processing unit ( | 10-13-2011 |
20110268455 | Modular Safety Switching Device System With Optical Link - A modular safety switching device system for actuating actuators in a fail-safe manner. and a switching device system wherein a plurality of switching devices are connected in series and optically communicate with each other. The system includes a first and a second safety device. The first and second safety devices are connected to each other via an optical link. The optical link may be formed in a way that the first safety device comprises an optical transmitter and the second safety device comprises an optical receiver configured to receive information from the optical transmitter. | 11-03-2011 |
20110274436 | OPTICAL COMMUNICATION SYSTEM - Consistent with the present disclosure a transmitter is provided that transmits data in either a “quasi-DP-BPSK” (“QDP”) mode or in a DP-QPSK mode. In the QDP mode, data bits are transmitted as changes in phase between first and second phase states along a first axis or as changes in phase between third and fourth phase states along a second axis in the IQ plane. Although the transmitter outputs an optical signal that changes in phase between each of the four states, a sequence bit identifies which axis carries the data bit. The sequence bit is one of a series of sequence bits that may be generated by a pseudo-random number generator. The series of sequence bits can be relatively long, e.g., 32 bits, to permit sufficiently random changes in the axis that carries the data. Thus, unlike conventional BPSK, in which data is transmitted between phase states along a single axis, the present disclosure provides an apparatus and related method for randomly selecting one of two axes, for example, for each transmitted bit. In the receiver, it has been observed that the MU-CMA algorithm can process data carried by optical signals in the QDP mode with relatively few errors. Thus, the same equalizer (FIR) filter may be used to process BPSK, as well as QPSK data. | 11-10-2011 |
20110293286 | Method for optical data transmission using existing indicator or illumination lamp - A method is described for the transmission of data using LEDs or other light sources without interfering with the standard use of the lighting source. | 12-01-2011 |
20110305460 | PORTABLE LIGHT PROVIDING ILLUMINATION AND DATA - A system may comprise a portable light and a receiver therefor. The portable light for illuminating may comprise: a light source, a housing supporting the light source, a processor selectively energizing the light source from an electrical power source to produce illumination, a switch controlling the processor, and a memory storing data relating to the portable light, wherein the processor modulates the light source responsive to the stored data. The receiver receiving data transmitted by the portable light may comprise: a receiver housing including a light sensitive receiver receiving data emitted by the light source; and a receiver processor reproducing a representation of the data stored in the memory and providing the decoded received data for perception by a human and/or for use by a computing device. | 12-15-2011 |
20120002976 | IDENTIFICATION AND COMMUNICATION SYSTEMS - In some embodiments, an identification and communication system described herein comprises one or more query units and one or more response units, wherein at least one query unit comprises a query beam source operable to emit a query beam and at least one response unit comprises at least one detector comprising an application specific integrated circuit (ASIC) comprising an amplifier operable to amplify the query beam. In some embodiments, a system comprises one or more query units and one or more response units, wherein at least one response unit comprises at least one detector capable of detecting incident radiation having a power of about 100 pW or less. In some embodiments, a system comprises at least one component of a response unit disposed in a first housing mounted to a weapon and at least one component of a query unit disposed in a second housing mounted to the weapon. | 01-05-2012 |
20120070155 | FLEXIBLY CONFIGURABLE OPTICAL SUB-ASSEMBLY - Multiple pins extend from the outside to the inside of an optical sub-assembly. A light receiver or a light transmitter is arranged inside the optical sub-assembly. A receiver circuit and transmitter circuit (TX) are arranged inside the optical sub-assembly and connected between the multiple pins and the light receiver and the light transmitter. The receiver circuit comprises a receiver communication interface in order to transform an output signal of the light receiver into a communication signal, and wherein the transmitter circuit comprises a transmitter communication interface to transform a communication signal into an input signal of the light transmitter. A control interface is connected with the receiver circuit and the transmitter circuit arranged inside the optical sub-assembly, wherein the control interface is connectable to two of the multiple pins. | 03-22-2012 |
20120076503 | SYSTEMS AND METHODS FOR QUANTUM ILLUMINATION DETECTION FOR OPTICAL COMMUNICATIONS AND TARGET DETECTION - A detection system including a receiver, a transmitter, and a processor for stealthy target detection or optical communications is described. Optical communications may be spread spectrum encoded communications over a bright background communication channel. The transmitter includes a quantum frequency entanglement source for outputting a signal beam and an idler beam, and transmission optics for directing the signal beam towards a remote surface. Photons in the idler beam are quantum-mechanically entangled in frequency with photons the signal beam. The transmitter includes a first spectrometer for measuring a frequency band associated with photons in the idler beam. The receiver includes a second spectrometer for identifying the frequency band associated with the photons in the received return beam. The system includes a processor configured to process the output of the spectrometers to determine the presence of a target in a target region or a message encoded in the received return beam. | 03-29-2012 |
20120082463 | ELECTRO-OPTICAL COMMUNICATIONS LINK - A communications link for carrying data between a transmitter and a receiver operates according to a communications protocol (such as PCI Express (PCIe)) specifying a reduced-power link operating state in which the transmitter generates a reduced-amplitude electrical output signal and the receiver is to operate in a power-save mode. The communications link includes an electro-optical link and a circuit coupling an output of the transmitter to an electrical input of the electro-optical link. The circuit is configured to detect initiation of the reduced-power operating state and to send messages to the receiver to maintain a normal amplitude of an optical signal on the electro-optical link. | 04-05-2012 |
20120114338 | APPARATUS AND METHOD FOR MONITORING A VARIETY OF RESOURCE CONSUMPTION METERS - An apparatus is disclosed for attachment to a resource consumption meter emitting and detecting a signal having a first frequency relative to the rate of metered resource consumption. The apparatus comprises at least one signal detection means adapted to detect said signal from said resource consumption meter; and, a circuit operatively connected to the signal detection means and adapted for interpreting the signal for a human. A method for multi-mode operation of the apparatus is disclosed so that it is possible for the apparatus to automatically detect the type of resource consumption meter it is attached to and operate accordingly. | 05-10-2012 |
20120141135 | Optical Communication System, Device and Method Employing Advanced Coding and High Modulation Order - A transmitting device, a receiving device, an optical communication system, and associated methods are provided. The transmitting device transmits an optical signal containing data, and comprises: an optical tone generator for generating at least one optical tone; at least one encoder for performing advanced coding on at least one data signal respectively, each of the at least one data signal carrying a part of the data; at least one mapper for performing high order modulation on the at least one coded data signal; and an up-converter for up-converting the at least one high-order-modulated data signal into the optical signal to be outputted through the at least optical tone. Thereby, high speed (e.g., over 1-Tb/s) transmission per single channel over a long-haul distance (e.g. over 1000-km) with error-free recovery may be achieved. | 06-07-2012 |
20120141136 | METHOD AND ARRANGEMENT FOR TRANSFERRING DATA FOR THE MAINTENANCE OF A SELF-SERVICE TERMINAL - In order to maintain self-service terminals (SS terminals), data must be transferred to a data center by means of telecommunication connections. However, in particularly sensitive fields of application, a direct link of SS terminals to external networks or devices is undesirable. Usually, the maintenance personnel must then access the service and diagnostic data locally at the SS terminal and share said data with the help desk personnel in the data center by telephone. In order to be able to transfer the maintenance and diagnostic data directly between the SS terminal and the data center even without directly linking the SS terminal, the data are transferred in a current-free and radio-free data transfer form in the vicinity of the self-service terminal ( | 06-07-2012 |
20120230701 | OPTICAL SPACE COMMUNICATION DEVICE, COMMUNICATION METHOD THEREOF AND OPTICAL SPACE COMMUNICATION SYSTEM - A optical space communication device, including: a transmission module transmitting an optical signal to a specific opposite communication device whose position is known, a reception module receiving the optical signal transmitted from a plurality of indefinite opposite communication devices, and a central communication control device controlling the transmission module and the reception module. | 09-13-2012 |
20120230702 | PHOTON DETECTOR - A photon detection system including a photon detector configured to detect single photons, the photon detector being gated such that it produces a periodic output signal and the gating signal having a frequency of at least 50 MHz. The system further includes a combiner for combining the signal from one period with signals from other periods such that periodic variations in the output signal of the detector are suppressed. | 09-13-2012 |
20120243878 | RADIO FREQUENCY AND DIGITAL SIGNAL DUAL CARRIER MULITPLE MODULATION SYSTEM - The present invention is a radio frequency and digital signal dual carrier multiple modulation system that includes a transmitter system with digital components that include digital inputs, carrier signal sources, a multiplexer and logic controlled radio frequency switches that produces modulated signals and radio frequency components that includes radio frequency signal input and a radio frequency variable gain amplifier. There is also a receiver system with digital components that include a demultiplexer, buffer amplifiers, detectors, comparators and digital signal outputs that receive modulated signals from the transmitter system and radio frequency components with another radio frequency variable gain amplifier that receives the radio frequency output from the transmitter system and produces an amplified radio frequency output. | 09-27-2012 |
20120243879 | COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND COMMUNICATION METHOD - A communication system includes a transmitter that combines and transmits a first signal light and a dummy light having a wavelength different from the first signal light; a first amplifier that amplifies a light transmitted by the transmitter to a constant power; a communication device that separates the dummy light from the light amplified by the first amplifier, has a variable transmittance and allows the separated dummy light to pass through, and combines and transmits the passed dummy light and a second signal light having a wavelength different from the dummy light; a second amplifier that amplifies a light transmitted by the communication device to a constant power; a receiver that receives the second signal light included in the light amplified by the second amplifier; and a controller that controls the transmittance. | 09-27-2012 |
20120269518 | OPTICALLY-CONNECTED SYSTEM FOR EXCHANGING DATA AMONG INDUSTRIAL AUTOMATION DEVICES - An optically-connected system is disclosed for exchanging data among industrial automation devices, that is composed of a plurality of connection modules, where each module comprises at least two pairs of optical transmitters and receivers on the main side, and one optical receiver on the opposing main side, that are opposite with respect to another pair of transmitters and receivers in a following module; and where each one of the transmitters and receivers is adapted to communicate with industrial automation devices to cooperate for exchanging data between modules, sending one interrogation signal requesting an identity of the module and the receiver is adapted to send to each corresponding response signal containing characteristics of the receiver. | 10-25-2012 |
20120328304 | OPTICAL TRANSMISSION SYSTEM - An optical transmission system for optically transmitting information between apparatuses via an optical transmission path. The system includes: a sending unit that emits, to the optical transmission path, excitation light for detecting an inter-apparatus connection via the path; a responding unit that receives the excitation light from the path and emits detection light to the path using light energy of the excitation light; a response receiving unit that receives the detection light from the path and outputs a detection light current; a detecting unit that detects presence/absence of the inter-apparatus connection based on the detection light current; a light signal transmitting unit that emits, to the path, a light signal for optically transmitting the information based on the detection result by the detecting unit; and a light signal receiving unit that receives the light signal from the path. | 12-27-2012 |
20130177324 | SENDING/RECEIVING SYSTEM, SENDING/RECEIVING METHOD, AND NON-TRANSITORY COMPUTER-READABLE MEDIUM - A sending/receiving system includes first and second sending/receiving apparatuses. The first sending/receiving apparatus includes a first sending section that sends link establishment information via first transmission channels. The second sending/receiving apparatus includes a second sending section, link establishing sections, and a controller. The second sending section sends link establishment information to the first sending/receiving apparatus via a second transmission channel. Each of the link establishing sections is provided for a corresponding one of the first transmission channels and establishes a link in the corresponding first transmission channel on the basis of the link establishment information. When links have been established in all of the first transmission channels by the link establishing sections, the controller causes the second sending section to send the link establishment information in order to cause the first sending/receiving apparatus to establish a link in the second transmission channel. | 07-11-2013 |
20130188967 | Method and Device for Transmitting a Low-Frequency Signal Over a Data Transmission Link Using a Digital High Bit-Rate Signal - Disclosed is a method for transmitting a low-frequency signal over a data transmission link using a digital high bit-rate signal including the steps of creating a modulated digital high bit-rate signal the average power of which varies according to the low-frequency signal, supplying the modulated digital high bit-rate signal to a first end of the data transmission link, receiving the modulated digital high bit-rate signal at a second end of the data transmission link or at an intermediate node of the data transmission link, and detecting the low-frequency signal by low-pass filtering the received modulated digital high bit-rate signal. According to the invention, the variation of the average power of the modulated digital high bit-rate signal is effected by a variation of the density of “high” bits according to the low-frequency signal. | 07-25-2013 |
20130209109 | Fiber Optic Intercom for Bucket Truck Application - An insulated bucket truck intercom facilitates safe/reliable bucket-to-cab and bucket-to-ground communications during truck operations, while in close proximity to high voltage power sources/lines. A truck-powered cab transceiver and battery-powered bucket transceiver are interconnected by fiber optic cable to maintain high voltage electrical isolation of at least 10 KV/foot. A hands-free bucket transceiver liberates bucket workers from depressing a PTT button to communicate during repair operations. A PTT cab transceiver prevents stray sounds from distracting bucket workers. Bucket elevation through extension of the telescoping boom, with fiber optic cable secured thereto, is accommodated by a self-storing fiber optic reel assembly on each section. Play in the cable and a spring-loaded pulley member accommodates boom articulation. A cab transceiver radio interface permits interference-free communication between the bucket transceiver and/or the cab transceiver, with a remote walkie-talkie up to 10 miles distant. | 08-15-2013 |
20130259488 | REACTIVE METAL OPTICAL SECURITY DEVICE AND METHODS OF FABRICATION AND USE - A reactive metal optical security device for implementation in an optical network and/or system to provide a mechanism for disrupting the optical network and/or system. The security device includes a mirror comprising a reactive metal stack and configured to reflect an optical signal and receive an electrical signal. The security device further includes a semiconductor chip configured to send the electrical signal to the mirror. | 10-03-2013 |
20130315605 | SAFETY SYSTEM - A nodal system ( | 11-28-2013 |
20140016943 | FILTER-BASED DPSK COMMUNICATIONS SYSTEM - A filter-based method of demodulating differentially encoded phase shift keyed (DPSK) optical signals, such as commonly used binary-DPSK (DBDPSK) and quadrature DPSK (DQPSK) signals, that can achieve optimal receiver sensitivity is described. This approach, which combines filtering and differential phase comparison, can reduce the complexity and cost of DPSK receivers by obviating delay-line interferometer-based demodulation. This can improve receiver stability and reduce size, weight, and power, while maintaining the ability to achieve optimal communications performance. | 01-16-2014 |
20140079406 | FRAME FORMATTING FOR HIGH RATE OPTICAL COMMUNICATIONS - Methods, systems, and devices are described for formatting of data streams to be transmitted over fiber optic channels, and for processing received optical signals. A data transmission device may include a digital coding and modulation module that encodes a digital data stream, inserts unique words into the digital data stream, and modulates the encoded data stream and unique words onto optical channels for transmission over an optical fiber. A demodulation and decoding device may include a unique word identification module that identifies the unique words inserted in each optical channel stream, determines one or more characteristics of the plurality of optical channels based on the unique words, and provides the one or more characteristics to one or more other modules in the demodulator and decoding device. | 03-20-2014 |
20140153932 | INTEGRATED ENVIRONMENTALLY PROTECTIVE BARRIER WITH LIGHT BLOCKING AND LIGHT TRANSMITTING FEATURES TO OPTICALLY COMMUNICATE BETWEEN TWO ELECTRONIC DEVICES OPERATING IN DIFFERENT ENVIRONMENTS - An integrated environmental barrier for protecting the receiver portion of a fuel cell stack health monitoring system. The stack health monitoring system includes a transmitting measurement module and an optical communication module having a receiver. Measurements indicating the health of the fuel cell stack are optically communicated between the transmitter and receiver through the environmentally protective barrier. The environmentally protective barrier is disposed between the measurement module and the optical communication module such that the environmental barrier isolates the optical communication module from the environment contained within the fuel cell stack. The environmental barrier comprises light blocking and light transmitting portions enabling system variation while ensuring signal integrity. | 06-05-2014 |
20140161468 | OPTICAL ISOLATION SYSTEM AND ASSEMBLY - An optical isolation system and assembly includes LEDs and photodiodes separated by an electrical isolation gap. A cover including a plurality of compartments physically encompasses each LED and photodiode pair. | 06-12-2014 |
20140270801 | SYSTEMS AND METHODS USING OPTICAL COMMUNICATION FOR COMMISSIONING OF NETWORK NODES - Embodiments relate to methods, devices, and computer-implemented methods for transmitting a modulated signal transmitted from at least one signal light source and using the modulated signal for commissioning of network nodes. The method can include determining, by a network node, that the network node is not commissioned. The method can further include generating, by the network node, a random number, and generating a modulated light signal based on the random number. In addition, the method can include transmitting, to an image capture device, the modulated light signal, receiving, from a network control unit, via a radio channel, an encrypted commissioning message, and decrypting, by the network node, the encrypted commissioning message using the random number. Further, the method can include establishing, with the network control unit, communication based on data in the encrypted commissioning message. | 09-18-2014 |
20140334828 | PRE-EQUALIZATION USING PHASE CORRECTION - An optical transmitter determines the transfer function in the reference-based pre-equalization for applying to an optically modulated signal at the transmitter. The determined pre-equalization transfer function is made robust to linewidth inaccuracy of the optical source by performing phase correction during the calculation of the pre-equalization transfer function. The phase correction includes averaging a number of consecutive received phase samples. The determined pre-equalization transfer function is applied to modulated signals prior to the transmission over an optical medium. | 11-13-2014 |
20140341591 | SYSTEMS AND METHODS FOR OPTICALLY POWERING TRANSDUCERS AND RELATED TRANSDUCERS - The present disclosure describes an optically powered transducer with a photovoltaic collector. An optical fiber power delivery method and system and a free space power delivery method are also provided. A fabrication process for making an optically powered transducer is further described, together with an implantable transducer system based on optical power delivery. | 11-20-2014 |
20140348513 | OPTICAL ASSEMBLY FOR OPTICAL COMMUNICATION SYSTEMS - An optical assembly comprising a semiconductor chip having a handle layer and a device layer on the handle layer. The device layer comprises a focusing element, a MEM device, and one or more support islands coupled to a different portion of the handle layer. One portion of the MEM device is coupled to the focusing element and another portion of the MEM device is coupled to one portion of the handle layer, and the MEM device is configured to change a physical position or orientation of the focusing element in response to an electrical actuation. | 11-27-2014 |
20150055961 | SYSTEM AND METHOD FOR QUANTUM BASED INFORMATION TRANSFER - A system for communicating data comprising sender and receiver subsystems; at least one data input; at least one entangled photon source; first photons of the pairs of entangled photons outputted by the at least one photon source being processed by one of the sender or receiver subsystem; second photons of the pairs of entangled photons being processed by the other of the sender or receiver subsystem; a photonic element configured to receive the first photons of the pairs of entangled photons and enable interference therebetween; at least one absorber configured to absorb the first photons after passage through the beam splitter, the absorbance of the first photons operating to transfer the properties of the entanglement to the second photons of the pairs of entangled photons; and a Bell state measurement element operatively associated with the receiver subsystem configured to measure the second photons of the pairs of entangled photons. | 02-26-2015 |
20150063822 | OPTICAL TRANSMITTER, OPTICAL TRANSMISSION/RECEPTION SYSTEM, AND DRIVE CIRCUIT - An optical modulator includes optical waveguides on which phase modulation regions are formed. A drive circuit includes a lower-bit drive unit, an upper-bit drive unit, and a bit splitting unit. The bit splitting unit splits an input digital signal into upper bits and lower bits. The lower-bit drive unit outputs a value obtained by performing D/A conversion on the lower bits to phase modulation regions. The upper-bit drive unit outputs, to phase modulation regions, a value greater than a maximum value of values output from the lower-bit drive unit, or a minimum value of the values output from the lower-bit drive unit, according to a value of the upper bits. | 03-05-2015 |
20150063823 | Method, Transmitter and Receiver Device for Transmitting a Binary Digital Transmit Signal Over an Optical Transmission Link - The invention relates to a method for transmitting a binary digital transmit signal over an optical transmission link. The method includes the steps of creating a differential optical duobinary signal (S | 03-05-2015 |
20150093118 | IN-BAND SIGNALING FOR RECONFIGURING SOFTWARE DEFINED OPTICS - In an optical communication system, an optical transmitter changes operational physical layer parameters to meet future target throughput for the optical communication system. The optical transmitter communicates the upcoming change to the optical receiver in a message that used current physical layer parameters. The optical transmitter provides sufficient time to the optical receiver to adjust reception functions of the receiver, including polarization based demodulation scheme. In some implementations, the optical transmitter performs the transition to a new physical layer transmission format without waiting for an acknowledgement from the optical receiver. | 04-02-2015 |
20150098711 | OPTICAL RECEPTION CIRCUIT, OPTICAL RECEPTION DEVICE, AND OPTICAL TRANSMISSION SYSTEM - Into a current-voltage conversion unit, a single-end current signal which is a photoelectrically converted optical signal is input. The current-voltage conversion unit converts the single-end current signal into a single-end voltage signal and outputs the converted signal from an output terminal. | 04-09-2015 |
20150104187 | SYSTEM AND METHOD FOR COMMUNICATION OVER COLOR ENCODED LIGHT PATTERNS - The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication includes mechanisms for oversampling the color code flashes to enhance the accuracy of the method and system. | 04-16-2015 |
20150117865 | OPTICAL RECEIVING APPARATUS, OPTICAL TRANSMITTER AND RECEIVER MODULE, AND OPTICAL TRANSMITTING AND RECEIVING APPARATUS - A housing accommodates an optical waveguide substrate, plural signal light receiving elements, and a signal-light-level monitoring light receiving element. Signal light and locally oscillated light are input into optical waveguides in the optical waveguide substrate from a first end face of the optical waveguide substrate. The plural signal light receiving elements are disposed aligned on a side of a second end face opposite to a side of the first end face of the optical waveguide substrate. The signal-light-level monitoring light receiving element is disposed on a side of a third end face or a fourth end face between the first end face and the second end face of the optical waveguide substrate and at a position closer to the first end face than to the second end face. | 04-30-2015 |
20150117866 | QUADRATURE AMPLITUDE MODULATION SYMBOL MAPPING - Modulation and demodulation of digital signals comprising symbols representing four or more bits uses a constellation map in which initial two bits of the modulated data identify a quadrant of the constellation map and the remaining bits of the modulated data identify a symbol within the quadrant corresponding to the four or more data bits. In some systems, the constellation map is made up from each successive two bits of the input data bits successively identifying a quadrant within a quadrant until a group of bits is uniquely mapped to a single symbol. | 04-30-2015 |
20150132010 | DATA NETWORK, AIRCRAFT OR SPACECRAFT, AND METHOD - A data network, especially a data network for an aircraft or spacecraft, includes a primary data grid, and at least one secondary data grid, the primary data grid including primary data nodes, wherein the primary data nodes are directly or indirectly coupled in data communication with each other, and the at least one secondary data grid comprising secondary data nodes, wherein the at least one secondary data grid is configured to connect the secondary data nodes in a data communication chain and to connect the first secondary data node of the data communication chain to a first respective primary data node and/or the last secondary data node of the data communication chain to a second respective primary data node. | 05-14-2015 |
20150316511 | REAL-TIME DETECTION AND IMAGING OF TERAHERTZ PULSE RADIATION BY USING PHOTOACOUSTIC CONVERSION - Methods and devices for high speed detection of terahertz radiation are provided. A photoacoustic transducer receives a pulse of terahertz (THz) radiation. The transducer may comprise a solid, liquid, or semi-solid material. For example, the transducer may be a composite material having a polymer and radiation absorbing particles. The photoacoustic transducer produces an acoustic wave (e.g., an ultrasound wave) in response to receiving the pulse of THz radiation. An acoustic sensor receives the acoustic wave produced by the photoacoustic transducer and thus provides detection of the THz wave. | 11-05-2015 |
20150372761 | PHOTOELECTRIC SENSOR WITH TONE MODULATION - A photoelectric sensor comprises an emitter that generates a light beam modulated using a single-tone or multi-tone continuous wave signal (e.g., a sine wave, square wave, or triangular wave) rather than emitting a high-bandwidth pulsed light signal. Since the light beam is modulated using a single tone signal, the receiver is able to demodulate and evaluate the received optical signal within a narrow band around the fundamental frequency of the signal, thereby achieving greater noise rejection relative to light pulse modulation techniques, which require evaluation over a larger bandwidth. The photoelectric sensor also consumes relatively low power, since the single-tone signal requires less power to generate relative to light pulse modulation techniques. | 12-24-2015 |
20160073465 | DRIVER CIRCUIT WITH ADAPTIVE PEAKING CONTROL - A communication system implementing one or more a Light Emitting Diodes (LEDs) and a driver circuit for the same is disclosed. A method of driving the one or more LEDs is also disclosed. The driver circuit is disclosed to include a first input branch and a second input branch. The first input branch provides a first driving current to the one or more LEDs and the second input branch selectively provides a second driving current to the one or more LEDs. The magnitude of the second driving current is adjustable in response to variations in at least one characteristic of the one or more LEDs. | 03-10-2016 |
20160087723 | METHOD, APPARATUS, AND COMMUNICATION NODE FOR SUPPRESSING OUTPUT NOISE OF PCIE DEVICES IN OPTICAL FIBER COMMUNICATION - A method, an apparatus, and a communication node for suppressing output noises of peripheral component interconnect express (PCIe) devices in optical fiber communication is provided. The communication node includes a PCIe chip and a detection and control circuit connected to a transmitting end of the PCIe chip. The PCIe chip transmits an electrical signal by a transmitter of a first lane. The detection and control circuit detects a differential-mode voltage of the electrical signal. If the differential-mode voltage is lower than a first threshold, the detection and control circuit controls an optical module connected to the PCIe chip not to transmit an optical signal through the first lane of the optical module. When a PCIe system includes the communication node, output noises of the transmitter is suppressed, and a normal optical fiber communication link is ensured. | 03-24-2016 |
20160164703 | System and Method for Backchannel Closed Loop Feedback for Channel Equalization over Ethernet - A system and method for backchannel closed loop feedback for channel equalization over Ethernet. Closed loop backchannel feedback for real-time transmitter adaptive equalization is provided for a pair of non-ideal duplex communication channels. The real-time transmitter adaptive equalization enables use of low cost relaxed specification transmitter modules at high data rates. | 06-09-2016 |
20160173203 | REDUCING POWER REQUIREMENTS FOR OPTICAL LINKS | 06-16-2016 |