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By optical coupling

Subclass of:

398 - Optical communications

398043000 - MULTIPLEX

398079000 - Wavelength division or frequency division (e.g., Raman, Brillouin, etc.)

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Class / Patent application numberDescriptionNumber of patent applications / Date published
398083000 Add or drop 70
398087000 Grating 10
398088000 Lens 2
20110110666OPTICAL COMMUNICATION MODULE FOR OPTICAL WAVELENGTH DIVISION MULTIPLEXING - An optical communication module for optical wavelength division multiplexing includes a plurality of light devices emitting or receiving light beams having different wavelengths, a single optical fiber, and an optical elements arranged between the plurality of light devices and the single optical fiber and having a plurality of lens areas to converge a light beam starting from a single point at a plurality of points or light beams starting from a plurality of points at a single point. In the optical communication module, the plurality of lens areas are arranged such that the center points of the plurality of lens areas are located at the same distance from a point, and the single point and the plurality of points are located at the opposite sides with respect to the optical element.05-12-2011
20110182586WAVELENGTH DIVISION MULTIPLEXING - Technologies relating to wavelength division multiplexing are provided. In one implementation, a wavelength division multiplexing (WDM) coupler is provided. The WDM coupler includes an input block including a first tube, the first tube holding an input dual fiber pigtailed capillary, the capillary holding an input fiber and a reflection fiber, a center block including a center tube holding a first inner tube and a second inner tube, the first inner tube holding a first lens within the first inner tube and the second inner tube holding a second lens within the second inner tube, the center block further including a WDM filter positioned between the first lens and the second lens and secured to the end surface of the first inner tube, and an output block including a second tube holding an output single fiber pigtailed capillary, the capillary holding a transmission fiber.07-28-2011
Entries
DocumentTitleDate
20100119231PLANAR LIGHTWAVE CIRCUIT (PLC) DEVICE WAVELENGTH TUNABLE LIGHT SOURCE COMPRISING THE SAME DEVICE AND WAVELENGTH DIVISION MULTIPLEXING-PASSIVE OPTICAL NETWORK (WDM-PON) USING THE SAME LIGHT SOURCE - In the manufacture and application of a PLC-ECL type wavelength tunable light source, provided is a wavelength tunable mechanism with improved performance and stability, a light source with improved packaging performance and mass productivity, and a light source applied to a WDM-PON with initialization and stabilization functions. The wavelength tunable light source having a PLC (planar lightwave circuit)-ECL (external cavity laser) structure includes a first housing in which a semiconductor optical gain medium is mounted, a second housing in which a PLC device is mounted, and a third housing in which an optical fiber is mounted. The first, second, and third housings make an optical axis alignment through an optical coupling lens and combined in a laser welding method.05-13-2010
20120183296MULTIPORT PASSIVE DEVICE FOR SHARING OPTICAL SIGNALS - A multiport passive optical signal sharing device enabling optical signals received by each of a first plurality of ports of the device to be transmitted to all of the ports of a second plurality of ports of the device. The device includes a first coupling mechanism adapted to combine signals received by each port of the first plurality of ports of said device into a first optical signal, the first optical signal being transmitted over a bi-directional optical link. The device further includes a second coupling mechanism and guide for redirecting the first optical signal in a form of a second optical signal into the bi-directional optical link, in the opposite direction from that of the first optical signal, the first coupling mechanism being adapted to duplicate the second optical signal on each port of the second plurality of ports of the device.07-19-2012
20100111537Passive Optical Networks with Mode Coupling Receivers - An apparatus comprising a mode coupler configured to couple a plurality optical signals into a plurality of modes, and a receiver coupled to the mode coupler and configured to detect the modes to obtain the optical signals, wherein the optical signals are coupled from single mode fibers. Also disclosed is an apparatus comprising a plurality of single mode waveguides configured to transport a plurality of single mode signals, and a detector coupled to the single mode waveguides and configured to detect the single mode signals, wherein the single mode signals are substantially coupled without loss from the single mode waveguides to the detector. Also disclosed is a method comprising receiving a plurality of single mode optical channels, coupling the single mode optical channels into a multimode channel, and detecting the optical modes corresponding to the channels in the multimode channel.05-06-2010
20100104290Optical subassembly manufacturing method, optical subassembly, OSA array, optical interconnecting device, WDM oscillator, and receiving circuit - An optical subassembly manufacturing method includes forming connecting electrodes and a piece of high-melting-point glass on a wiring substrate; positioning on and connecting to the connecting electrodes, an optoelectronic converting element; disposing on the piece of high-melting-point glass, a piece of low-melting-point glass having a melting point lower than the piece of high-melting-point glass; and fixing to the piece of low-melting-point glass, a protruding portion of a lens member further having a lens portion. The protruding portion has a shape matching that of the piece of high-melting-point glass, and relative positions of the protruding portion and the optical axis of the lens portion are determined to correspond to relative positions of the connecting electrodes and the piece of high-melting-point glass. The fixing includes fixing the protruding portion of the lens member to the piece of high-melting-point glass via surface tension generated by melting the piece of low-melting-point glass.04-29-2010
20100104289OPTICAL CONNECTING APPARATUS - An optical connecting apparatus has a light source outputting an optical signal indicating a plurality of wavelengths which correspond to a plurality of transmission channels, an optical transmit section and an optical receive section being mounted with integrated circuits and being connected to each other through an optical line of a single system, and a signal conversion section being inlet in the optical line and converting a phase modulated signal into an intensity modulated signal. The optical transmit section includes: a demultiplexer which separates the optical signal from the light source according to the transmission channels; an optical modulator unit which generates phase modulated signals by implementing phase modulation with optical signals from the demultiplexer by using a plurality of optical modulators whose operations are synchronized by a signal from the integrated circuit; and a multiplexer which multiplexes the phase modulated signals from the optical modulator unit and outputs the multiplexed phase modulated signals to the signal conversion section through the optical line. The optical receive section includes: a demultiplexer which separates the intensity modulated signal from the signal conversion section according to the transmission channels; and an optical receiver unit which converts the intensity modulated signals from the demultiplexer into electric signals.04-29-2010
20130071124Coherent Optical Receivers For Colorless Reception - One coherent optical receiver includes a 3×3 coupler for receiving a signal and a local oscillator into a first and a third input port respectively, and three detectors for detecting a respective output of the coupler to generate corresponding first, second and third detected signals. A detected signal is filtered by an Alternating Current (AC) coupler to generate a respective first, second or third filtered signal. An adder adds the first, the second and the third filtered signals to determine a directly detected signal term. A first subtractor subtracts the directly detected signal term from the first filtered signal to determine an in-phase signal. A second subtractor subtracts the directly detected signal term from the third filtered signal to determine a quadrature signal. A digital signal processor processes the in-phase signal and the quadrature signal to recover the optical signal.03-21-2013
20130071123DEVICE AND METHOD FOR CONTROLLING LASING WAVELENGTH OF TUNABLE LASER, AND A WAVELENGTH DIVISION MULTIPLEXED-PASSIVE OPTICAL NETWORK HAVING THE SAME - The present invention discloses a device and method for controlling a lasing wavelength of a tunable laser, and a wavelength division multiplexed-passive optical network having the same.03-21-2013
20110038635Colorless Dense Wavelength Division Multiplexing Transmitters - An apparatus comprising a plurality of laser transmitters each comprising a polarization rotator, a polarization rotator mirror coupled to the laser transmitters, and a multiplexer positioned between the laser transmitters and the polarization rotator mirror. Also included is an apparatus comprising a first rotator configured to rotate light polarization by about 45 or about −45 degrees, a second rotator configured to rotate light polarization by about 45 or about −45 degrees, a mirror coupled to one side of the second rotator and configured to reflect at least a portion of the light, and a wavelength division multiplexing (WDM) filter positioned between the first rotator and the second rotator.02-17-2011
20110064411METHOD FOR CONTROLLING THE CENTER WAVELENGTH OF AT LEAST ONE NARROW BAND OPTICAL CHANNEL WDM TRANSMITTING DEVICE IN A WDM NETWORK AND CORRESPONDING WDM TRANSMITTING DEVICE - The invention relates to a method for controlling the center wavelength of at least one narrow band WDM optical channel transmitting device in a WDM network. A reflected signal portion of a WDM channel signal is evaluated at the location of a WDM transmitting device. In order to generate the reflected signal portion, the optical multiplexing device or an additional reflective filter may be used, the additional filter revealing a low reflectivity at the desired channel center wavelength and a sharply increasing reflectivity adjacent thereto. The center wavelength of the WDM transmitting device is tuned to this target center wavelength by wavelength-modulating the center wavelength with a predetermined (low) modulation frequency and predetermined wavelength amplitude. The center wavelength of the WDM transmitting device is tuned such that the first order modulation frequency component of the reflected signal portion is minimized. In order to safeguard that the tuned center wavelength of the channel signal is actually within the passband of the respective WDM channel, the second order modulation frequency component may be monitored. Further, the invention relates to a WDM transmitting device and a WDM transmission network realizing this method.03-17-2011
20090269069PASSIVE WAVE DIVISION MULTIPLEXED TRANSMITTER HAVING A DIRECTLY MODULATED LASER ARRAY - An wave division multiplexed (WDM) optical transmitter is disclosed including a directly modulated laser array and a planar lightwave chip (PLC) having a plurality of OSRs that receive outputs of the laser array and increase the extinction ratio of the received light. An optical multiplexer receives the outputs of the OSRs and couples them to a single output port. The multiplexer has transmission peaks through its ports each having a 0.5 dB bandwidth including the frequency of a laser in the array. The optical multiplexer may be embodied as cascaded Mach-Zehnder interferometers or ring resonators.10-29-2009
20090238570TOPOLOGICALLY MULTIPLEXED OPTICAL DATA COMMUNICATION - Systems and methods for encoding information in the topology of superpositions of helical modes of light, and retrieving information from each of the superposed modes individually or in parallel. These methods can be applied to beams of light that already carry information through other channels, such as amplitude modulation or wavelength dispersive multiplexing, enabling such beams to be multiplexed and subsequently demultiplexed. The systems and methods of the present invention increase the number of data channels carried by a factor of the number of superposed helical modes.09-24-2009
20120237223OPTICAL TRANSCEIVER HAVING OPTICAL RECEPTACLE ARRANGED DIAGONALLY TO LONGITUDINAL AXIS - An optical transceiver capable of narrowing an extra space for an external optical fiber is disclosed. The optical transceiver of an embodiment provides an optical receptacle with a port, to which the external optical fiber is to be inserted, headed for a direction in diagonal to the longitudinal axis of the optical transceiver. In another embodiment, the optical transceiver provides an optical receptacle capable of turning the port thereof.09-20-2012
20120189309PROTECTED LIGHT SOURCE FOR MULTIPLE WAVELENGTH DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORKS (WDM-PONS) - A protected light source for generating seed light for at least two wavelength division multiplexed passive optical networks (WDM-PONs). The protected light source includes an optical coupler having N≧2 input ports and M≧2 output ports, each output port being optically connected to supply seed light to a respective set of one or more WDM-PONs. A respective multi-wavelength light source (MWLS) is optically coupled to supply seed light to each input port of the optical coupler. A controller unit controls operation of each multi-wavelength light source (MWLS).07-26-2012
20090097851OPTICAL INTERCONNECT SYSTEM PROVIDING COMMUNICATION BETWEEN COMPUTER SYSTEM COMPONENTS - An optical interconnect system for communication between computer system components is described. The system includes an optical data communication path and a plurality of optical taps, each optical tap optically coupling a respective computer system component to the optical data communication path. Each optical tap splits power from an optical signal received from the data communication path or from a light source generating a data signal from its associated computer component resulting in another optical signal. Each optical tap splits light in accordance with a respective power ratio relationship between reflectivity and transmissivity. The ratio relationships of the optical taps together provide a predetermined communication reliability metric for signals traversing the optical interconnect system between computer system components.04-16-2009
20120141130OPTICAL TRANSMITTER AND OPTICAL TRANSMITTER UNIT - The optical transmitter includes a light source; a signal processor; an optical modulator that modulates output light from the light source in accordance with a transmitting signal subjected to digital signal processing in the signal processor and outputs the modulated light as a light signal to a transmission path; and a control circuit that controls a carrier-wave frequency of the light signal output from the optical modulator, the signal processor including a mapping circuit that maps the transmitting signal to electric-field information according to a modulating scheme, and a phase rotating circuit that provides a phase rotation having a constant cycle to an electric-field phase of the electric-field information to which the mapping circuit maps the transmitting signal, the control circuit controlling the cycle of the phase rotation that the phase rotating circuit provides and thereby controlling the carrier-wave frequency of the light signal output from the optical modulator.06-07-2012
20090196617SINGLE CORE BIDIRECTIONAL OPTICAL DEVICE - A single core bidirectional optical device having a light emitting element that is provided on the terminal of one optical fiber and makes light incident to the optical fiber, and a light receiving element for receiving light of the optical fiber, comprises a wavelength multiplexing/demultiplexing coupler that is provided on an optical axis of light incident to and emitted from the optical fiber and includes therein wavelength separating film for separating the light to light of one side and light of another side for every wavelength; a light emitting element provided on the direction of the light of the one side which is separated by the wavelength multiplexing/demultiplexing coupler; and a light receiving element provided on the direction of the light of the other side which is separated by the wavelength multiplexing/demultiplexing coupler.08-06-2009
20110170873Apparatus and Method For Generating Frequency-Locked Optical Comb Sources - Frequency-locked optical comb sources are provided that utilize recirculating frequency shifting based on frequency conversion in a modulator, together with a filter. The filter may be a wavelength notch filter and include a plurality of notches. An example apparatus includes a coupler, an I/Q modulator, and a filter. A first input of the coupler receives a first input optical carrier having a first frequency, and a second input of the coupler re receives a set of frequency-shifted carriers from the filter. The input optical carrier may have a plurality of frequencies. The I/Q modulator shifts the frequency of a first output of the coupler. The filter filters modulated output from the I/Q modulator thereby limiting the frequency-shifted carriers to be within an optical bandwidth. A second output of the coupler provides a plurality of frequency-locked carriers containing the first input optical carrier and the set of frequency-shifted carriers.07-14-2011
20110268447Optical Wavelength Multiplexing/Demultiplexing Circuit, Optical Module Using Optical Wavelength Multiplexing/Demultiplexing Circuit, and Communication System - When a conventional synchronized AWG is employed to extend a transmission passband, an increase in loss near the optical center frequency can not be avoided. Because of passband width limit, a problem has existed in that the synchronized AWG could not be applied for a large, complicated communication system wherein a signal light passes a number of points. Therefore, an optical wavelength multiplexing/demultiplexing circuit of the present invention is a synchronized AWG, which includes an optical splitter arranged in an interference circuit that is connected on the side of one slab waveguide. The splitting ratio of the optical splitter varies, depending on the optical frequency, and the value becomes minimum near the optical center frequency of the synchronized AWG. The optical splitter is operated so that the splitting ratio is comparatively great at optical frequencies distant from the optical center frequency.11-03-2011
20100021171MONOLITHICALLY INTEGRATED MULTI-DIRECTIONAL TRANSCEIVER - An integrated single-fiber multi-directional transceiver such as a diplexer or triplexer for FTTH applications comprises at least a laser for transmitting a first signal at a first wavelength, a photodetector for receiving a second signal at a second wavelength, and a 2×2 optical coupler. The 2×2 optical coupler has four ports, of which port 01-28-2010
20080310845HIGH BRIGHTNESS LIGHT SOURCE USING LIGHT EMITTING DEVICES OF DIFFERENT WAVELENGTHS AND WAVELENGTH CONVERSION - A wavelength division multiplexer and etendue conserved optics are used to combine multiple wavelength LED lights into a combined light. The combined light, with higher intensity and higher power than the light from an individual LED, is used to excite a wavelength conversion material such as phosphors to generate a high brightness and high power light. Light generated by multiple LEDs of the same wavelength may be coupled into a optical fiber bundle before inputting it into the wavelength-division multiplexer, further increasing the brightness and power. The wavelength conversion material may generate light of three different color under excitation by different LED lights, or a white light with higher brightness and higher power. Such a light source can be used in image display devices such as a projector or in illumination systems.12-18-2008
20090034977MULTIPLEXING HIGH SPEED LIGHT EMITTING DIODES (LEDs) - A system for multiplexing a plurality of high speed light emitting diodes (HSLEDs) includes a plurality of HSLEDs. Each of the plurality of HSLEDs emits a wavelength of light at a speed greater than or equal to about 1 Gigabyte per second. A multiplexer receives the wavelengths of light from the plurality of HSLEDs and combines the wavelengths of light for transmission over a channel. A method of multiplexing the plurality of HSLEDs is also disclosed.02-05-2009
20110129227Wavelength Stabilization and Locking for Colorless Dense Wavelength Division Multiplexing Transmitters - An apparatus comprising a laser transmitter having a first side and a second side, a filter coupled to the first side, a detector coupled to the second side, and a temperature controller coupled to the laser transmitter and the detector. Also disclosed is an apparatus comprising at least one processor configured to implement a method comprising receiving a photocurrent of a backward light from a laser, determining a wavelength shift offset between a wavelength of the output light and a filter transmission peak, and adjusting a temperature of the laser to substantially reduce the wavelength shift and align the wavelength of the output light with the filter transmission peak.06-02-2011
20100296812Multi-channel optical device - The multi-channel optical device includes a demultiplexer in a laser cavity. The demultiplexer is configured to demultiplex a multi-channel light beam into a plurality of channels. The demultiplexer limits the wavelengths of the channels that are output from the laser cavity. The gain element includes quantum dots as the gain medium.11-25-2010
20110052199Time-Coherent Global Network - A network of global coverage, scalable to hundreds of petabits per second, comprises bufferless switch units each of dimension n×n, n>1, arranged in a matrix of ν columns and ν rows, ν>1, interconnecting a maximum of ν×n edge nodes. Each edge node has ν upstream channels to ν switch units in ν different columns and ν downstream channels from ν switch units in ν different rows. All upstream channels to a switch unit are time-locked to the switch unit, thus enabling coherent switching at the switch unit.03-03-2011
20100166427OPTICAL HYBRID CIRCUIT, OPTICAL RECEIVER AND LIGHT RECEIVING METHOD - An optical hybrid circuit includes a MMI coupler including a pair of input channels provided at positions symmetrical with respect to a center position in a widthwise direction thereof, a pair of first output channels outputting a pair of first optical signals having an in-phase relationship, and a pair of second output channels neighboring with each other outputting a pair of second optical signals having an in-phase relationship. The MMI coupler converts QPSK signal light or DQPSK signal light into the pair of first optical signals and the pair of second optical signals having an in-phase relationship. The optical hybrid circuit includes a 2:2 optical coupler connected to the first or the second output channels. The 2:2 optical coupler converts the pair of first optical signals or the pair of second optical signals into a pair of third optical signals having a quadrature phase relationship with the pair of first or second optical signals.07-01-2010
20110318011TENANT ISOLATION IN A MULTI-TENANT CLOUD SYSTEM - Isolating tenants in a multi-tenant cloud system includes identifying a plurality of tenants in the multi-tenant cloud system, assigning a domain to each tenant of the plurality of tenants based on a wavelength division multiplexing (WDM), for each wavelength set of the plurality of wavelength sets, associating each wavelength set with a different domain of the plurality of domains and with a different indicator identifying the domain for the wavelength set, and isolating each tenant using the associated wavelength sets and associated indicators. The plurality of tenants share computational resources in the multi-tenant cloud system and the domain includes the computational resources for each tenant. The WDM uses a plurality of wavelength sets and each wavelength set includes one or more wavelengths.12-29-2011
20120057876METHOD FOR AMPLIFYING A BURST OPTICAL SIGNAL, BURST OPTICAL AMPLIFIER AND SYSTEM, AND COMMUNICATIONS SYSTEM - A method for amplifying a burst optical signal, a burst optical amplifier and system, and a communications system are provided according to embodiments of the present invention. The method includes: combining an auxiliary light and a signal light into a mixed light and outputting the mixed light, where the auxiliary light is a non-burst light, the signal light is a burst light, and power of the auxiliary light is set to be independent from power of the signal light; generating a pump light; and combining the pump light with the mixed light and inputting the combined light into a gain medium, so as to obtain an amplified mixed light. Present invention has the following advantages: reducing the delay time of enabling the burst optical amplifier, improving the transient response speed of the burst optical amplifier, and preventing the generation of a surge phenomenon, so as to prevent the generation of signal distortion.03-08-2012
20120057875WAVELENGTH DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORK - Consistent with the present disclosure, an optical communication system, such as a passive optical network (PON), is provided that includes an optical line terminal (OLT) and a plurality of optical network units (ONUs). The OLT includes a plurality of photonic integrated circuits that have both optical transmitters and receivers provided therein. Accordingly, the OLT may have fewer components and a simpler, more reliable and cost-effective design than a conventional OLT including discrete components. In addition, various ONU configurations are provided that also have a simple design and fewer components. Thus, ONUs consistent with the present disclosure may also have reduced costs.03-08-2012
20120057874WAVELENGTH DIVISION MULTIPLEXED PASSIVE OPTICAL NETWORK - Consistent with the present disclosure, an optical communication system, such as a passive optical network (PON), is provided that includes an optical line terminal (OLT) and a plurality of optical network units (ONUs). The OLT includes a plurality of photonic integrated circuits that have both optical transmitters and receivers provided therein. Accordingly, the OLT may have fewer components and a simpler, more reliable and cost-effective design than a conventional OLT including discrete components. In addition, various ONU configurations are provided that also have a simple design and fewer components. Thus, ONUs consistent with the present disclosure may also have reduced costs.03-08-2012
20100172648Installation for Conveying a First Plurality of Electrical Signals Carried by a First Triaxial Cable to a Second Triaxial Cable - The present invention relates to an installation for conveying electrical signals carried by a first triaxial cable (07-08-2010
20120213522GENERATING HIGHER-LEVEL QUADRATURE AMPLITUDE MODULATION (QAM) USING A DELAY LINE INTERFEROMETER AND SYSTEMS AND METHODS INCORPORATING SAME - In general, optical communication systems and methods may generate higher-level n08-23-2012
20120251118Adaptively Balanced Detector - Consistent with the present disclosure, a coherent detector is provided that includes an optical hybrid that supplies optical signals including local oscillator light to a balanced detector. The amount of imbalance or “balance error” in the balanced detector is identified by comparing an output of the balanced detector and an output of a photodiode that receives a portion of an input optical signal provided to the optical hybrid. Based on the balance error, electrical signals generated by the balanced detector or the power of optical signals passing through (or output from) the optical hybrid circuit can be adjusted so that the balance error is minimized or reduced to zero. As a result, imbalance associated with the balanced detector is corrected so that unwanted currents and/or related electrical signals are cancelled out or substantially cancelled out. Such unwanted currents and/or related electrical signals are generated in response to noise in the local oscillator light as well as intensity noise associated with non-selected optical signals in a superchannel.10-04-2012
20130195461ENERGY-EFFICIENT OPTICAL SOURCE - An optical source includes a set of N light sources that provide a corresponding set of N optical signals having N carrier wavelengths. These optical signals are combined into a seed optical signal and transported to a substrate using an optical fiber. This substrate includes a set of K optical amplifiers that amplify the seed optical signal and provide a set of M output optical signals on a corresponding set of M output optical waveguides (where M is less than K). In this way, a total power of the set of M output optical signals may be significantly larger than that of the seed optical signal, thereby ensuring that a majority of a power efficiency of the optical source is associated with power efficiencies of the set of K optical amplifiers instead of power efficiencies of the set of N light sources.08-01-2013

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