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US20080226307 Methods and systems for monitoring multiple optical signals from a single source  
Methods and systems for monitoring a plurality of different optical signals from a single source of such signals, where each such different optical signal is spatially separated from other such...
US20080199186 Optical Receiver  
A receiver for a differentially phase shift keying formatted optical signal, such as an RZ-DPSK formatted optical signal. Dither control loops are provided for controlling path length in a...
US20140193162 INFORMATION TRANSMISSION SYSTEM, INFORMATION SENDING DEVICE, INFORMATION RECEIVING DEVICE, INFORMATION TRANSMISSION METHOD, INFORMATION SENDING METHOD, INFORMATION RECEIVING METHOD AND PROGRAM PRODUCT  
An information transmission system includes: an information sending device including a light emitting section that emits light in a plurality of colors, a modulating section that modulates...
US20130188963 APPLYING CONTROLLED IMPEDANCE TO IMPROVE OPTICAL TRANSCEIVER BANDWIDTH  
An optical transceiver includes an optical receiver IC coupled to a processor IC. The processor IC includes an integrated optical receiver front end circuit, and includes an integrated inductor to...
US20100054748 RECEIVER AND SYSTEM FOR VISIBLE LIGHT COMMUNICATION  
A visible light communication system, includes a data storage apparatus, a data transmitter and a data receiver, the data transmitter includes data receiving module for receiving data from the...
US20100061730 OPTICAL TRANSMITTING OR RECEIVING UNIT INTEGRATING A PLURALITY OF OPTICAL DEVICES EACH HAVING A SPECIFIC WAVELENGTH DIFFERENT FROM EACH OTHER  
An optical unit is disclosed, in which the optical unit provides four optical devices each of which corresponds to a specific wavelength different from each other. In the transmitter unit, the...
US20080310860 Method and Apparatus for Decision Threshold Control In An Optical Signal Receiver  
A method of adjusting a decision threshold in an optical signal receiver. A forward error correction (FEC) decoder provides a feedback signal representative of corrected errors. The decision...
US20090022498 OPTICAL TRANSMISSION SYSTEM  
In the transmitting apparatus, phase modulation means phase-modulates a signal light from a signal source based on data. Polarization modulation means polarization-modulates the signal light which...
US20060034620 Low noise optical receiver  
A low noise optical receiver includes an amplifier in a feedback network, which allows the value of a feedback resistor to be increased. The magnitude of the gain of the feedback amplifier is...
US20080240736 Inter-Symbol Interference-Suppressed Colorless DPSK Demodulation  
An optical device includes an interferometer for a received optical differential phase shift keying DPSK signal, and an equalizer integrated with the interferometer in a manner for reducing from...
US20120148235 CONTROL CIRCUIT, COMMUNICATION SYSTEM, AND CONTROL METHOD  
A communication system includes a transmitter, a receiver device, and a control circuit. The transmitter transmits an optical signal. The receiver device receives the optical signal. The control...
US20120087668 METHOD AND DEVICE FOR GENERATING AND RECEIVING OOFDM SIGNAL, AND WAVELENGTH-DIVISION MULTIPLEXING SYSTEM  
Embodiments of the present invention relate to the field of communications, and in particular, disclose a method and a device for generating and receiving an OOFDM signal, and a...
US20110280588 PARTIAL DPSK (PDPSK) TRANSMISSION SYSTEMS  
An optical receiver includes a demodulator having a delay interferometer comprising an optical input that receives a phase modulated optical signal from a bandwidth limited transmission system....
US20100096447 OPTICAL IDENTIFICATION TAG, READER AND SYSTEM  
The present invention relates to an optical identification tag, a reader, and a system, and more particularly, to an optical identification tag which transmits its identification information using...
US20070071455 Automatic gain control  
A method and apparatus is presented for providing improved responsiveness of a receiver device. One embodiment includes a receiver device including an avalanche photodiode (APD), a transimpedance...
US20050213994 Arrayed receiver optical sub-assembly including layered ceramic substrate for alleviation of cross-talk and noise between channels  
A receiver optical subassembly (ROSA) includes a photodetector array and a transimpedance amplifier (TIA) array. In each data channel, the photodetector is wire bonded to a corresponding input pad...
US20170093501 MINIATURIZED DEVICES FOR COMBINED OPTICAL POWER CONVERSION AND DATA TRANSMISSION  
An optical data communication and power converter device includes a receiver circuit comprising an optical receiver. The optical receiver includes a photovoltaic device and a photoconductive...
US20130094866 Wearable accessory for monitoring whether user is looking at portable electronic device  
An accessory that includes a light transmitter may be worn by a user of an electronic device that includes a light receiver and a display screen. When the accessory is paired to the electronic...
US20130272721 OPTICAL NETWORK DEVICE EMPLOYING THREE-LEVEL DUOBINARY MODULATION AND METHOD OF USE THEREOF  
Introduced herein is an optical network device employing three-level duobinary modulation and a method of use thereof. One embodiment of an optical network receiver module includes: (1) an optical...
US20140348515 OPTICAL RECEIVER AND METHOD FOR CONTROLLING OPTICAL RECEIVER  
In order to suppress occurrence of a code error which occurs when an optical receiver detects a signal over a wide range of input intensity of the signal light by using a simple configuration, an...
US20120076506 COHERENT OPTICAL RECEIVING APPARATUS AND COHERENT OPTICAL RECEIVING METHOD  
A coherent optical receiving apparatus according to the present invention includes a coherent optical receiving unit to receive a whole of an optical multiplexed signal into which an optical...
US20110150506 OPTICAL RECEIVER AND RECEIVING METHOD  
An optical receiver includes an optical front-end, a digital converter, a frequency-characteristic-difference reducing unit and an identifying unit. The optical front-end splits an input signal...
US20070196112 Power save mode for an optical receiver  
According to embodiments of the present invention, an optical receiver detects an optical signal, determines the signal strength, and is placed in a power save mode if the optical signal strength...
US20130045015 METHOD AND ARRANGEMENT FOR SIGNAL PROCESSING IN A COMMUNICATION SYSTEM  
A signal processing method and a signal processing arrangement for coherent receivers are provided. The method includes the steps of receiving a coherent complex signal, extracting orthogonal...
US20090226187 Optical receiving apparatus and method  
An optical receiving apparatus compensates degradation of an optical signal received, based a division operation using the intensity of the optical signal. A receiving unit outputs a first...
US20090142074 OPTICAL RECEIVING APPARATUS, OPTICAL LINE TERMINAL APPARATUS, AND OPTICAL NETWORK SYSTEM  
The optical receiving apparatus of the present invention is provided with an optical receiving unit which receives a burst optical signal and outputs a signal in accordance with an optical...
US20120082464 COHERENT OPTICAL RECEIVING APPARATUS, COHERENT OPTICAL COMMUNICATIONS SYSTEM EMPLOYING SAME, AND COHERENT OPTICAL COMMUNICATIONS METHOD  
With respect to a coherent optical receiving apparatus, a polarization multiplexing light signal, whereupon a first signal is placed upon a first polarized wave light and a second signal is placed...
US20090067854 OPTICAL SPACE COMMUNICATION RECEPTION CIRCUIT, OPTICAL SPACE COMMUNICATION DEVICE, OPTICAL SPACE COMMUNICATION SYSTEM, AND ELECTRONIC DEVICE  
An optical space communication reception circuit receives a signal in switched-over communication speed modes and under settings corresponding to the communication speed modes. Receiver...
US20120288286 OPTICAL RECEIVER FOR AMPLITUDE-MODULATED SIGNALS  
An optical receiver that uses a coherent optical quadrature-detection scheme to demodulate an amplitude-modulated optical input signal in a manner that enables the use of a free-running optical...
US20130343751 Optical Receiver with a Wide Power Sensitivity Dynamic Range  
An optical receiver system includes a power adjustment device, an optical receiver, and a controller. The power adjustment device adjusts the power of an optical input signal in accordance with...
US20110052196 Narrow-band DPSK apparatus, system, method  
System, apparatus and methods are provided for optical communication which tolerates the tight filtering effects from concatenation of reconfigurable optical add drop multiplexers (ROADMs). An...
US20090245807 OPTICAL POWER MONITORING CIRCUIT, OPTICAL TRANSCEIVER, OPTICAL MODULE, OPTICAL RECEIVER, AMPLIFIER CIRCUIT, AND INTEGRATED CIRCUIT  
Optical power monitoring capable of achieving a wide dynamic range and high-speed response is realized. An optical power monitoring circuit includes: a first amplifier (TIA 2) that amplifies an...
US20160127048 SIGNAL PROCESSING METHOD, DETECTION METHOD, AND DETECTION DEVICE  
Provided is a signal processing method including a step of acquiring a plurality of Stokes parameters related to polarization in which X polarization and Y polarization included in a...
US20080298815 Small Form Pluggable Analog Optical Receiver  
A pluggable small form factor optical receiver is described. The optical receiver can be plugged into an optical receiver unit which may hold many optical receivers. The optical receiver includes...
US20140321862 PHOTON DETECTOR AND A PHOTON DETECTION METHOD  
A photon detection system is provided comprising a photon detector, configured to detect photons during intervals when in a receiving state and to output a signal when a photon is received, a...
US20150244467 OPTICAL TRANSMISSION DEVICE AND OPTICAL RECEPTION DEVICE  
An optical transmission device includes a division unit that divides transmission data into a plurality of data and outputs the plurality of data, a frequency conversion unit that shifts a...
US20100209100 OPTICAL RECEIVER  
The present invention provides an optical receiver able to monitor the level of the optical input signal in accurate even when the level is quite small. The optical receiver comprises a photodiode...
US20070292144 Coupler of Duality Modulated Radiation and Related Method  
A generator of duality modulated radiation, of which the irradiance, the wave intensity, or both, are varied from ordinarily equivalent levels, either for purposes of providing energy depleted or...
US20100014875 OPTICAL RECEIVER  
An optical detector includes a photoelectric conversion circuit converting an optical input signal into an electrical signal, an AC-to-DC signal conversion circuit converting the electrical signal...
US20090226188 BURST-MODE AUTOMATIC GAIN CONTROL CIRCUIT  
There is provided a burst-mode automatic gain control circuit capable of exerting gain control of a burst signal at high speed and stably. In the burst-mode ready digital automatic gain control...
US20080273881 BURST LIGHT RECEIVER, OPTICAL COMMUNICATION SYSTEM, BURST LIGHT RECEPTION CONTROL METHOD AND RECORDING MEDIUM WITH PROGRAM RECORDED THEREIN  
To enhance resistance against external factors such as junk data and noise in the burst signal by use of a simple configuration without separately requiring other dedicated circuits such as a mask...
US20140003815 Photonic Integrated Circuit Based Phase Conjugation Devices and Methods  
A photonic integrated circuit device comprises a receiver integrated in a substrate and having an optical input line, a first, a second, a third, and a fourth electrical output line, and a...
US20050152705 Gain variable amplifier, carrier detection system, and infrared remote-control receiver using them  
In a gain variable amplifier, a carrier detection circuit system, and an infrared remote-control receiver using the gain variable amplifier or the carrier detection circuit system, to each of a...
US20100245117 SYSTEM FOR DETECTING AN OBJECT IN A MONITORING AREA  
A system for detecting an object in a monitoring area with a plurality of sensors, each including a transmitter and a receiver, and an electronics unit for evaluating the receivers. The...
US20100272448 OPTICAL BURST SIGNAL RECEIVING DEVICE  
An optical burst signal receiving device includes: a photoelectric conversion unit that photoelectrically converts an input optical burst signal into a current burst signal and outputs the current...
US20060120732 Apparatus and method in optical receiver for receiving burst mode signal  
Disclosed is an optical receiver for receiving burst mode signals. In a first embodiment, AGC voltage is applied to a continuous mode TIA having an AGC function, so that the AGC function is...
US20090220249 DEMODULATION CIRCUIT  
A demodulation circuit for reproducing transmitted data from a signal received by a receiver, the demodulation circuit includes a selector, converters and data recovery circuits. The selector...
US20050201762 Optical RZ-duobinary transmission system with narrow bandwidth optical filter  
Simultaneous tolerance of system nonlinearities and chromatic dispersion in an optical transmission system using return-to-zero (RZ) duobinary signaling is achieved by filtering the received...
US20120128374 APPARATUS AND METHOD FOR PERFORMING COMMUNICATION USING POLARIZED LIGHT  
In an apparatus and a method for performing communication by using polarization property of light, a transmission apparatus includes a controller to establish a first channel corresponding to a...
US20090214226 OPTICAL DQPSK RECEIVER AND OPTICAL PHASE MONITOR APPARATUS FOR USE IN OPTICAL DQPSK RECEIVER  
First and second delay interferometers respectively have a phase-shift element. First and second photo detectors respectively detect optical signals output from the first and second delay...

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