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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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.... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |