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US20130177306 NOISE-RESILIENT CONSTELLATIONS FOR AN OPTICAL TRANSPORT SYSTEM  
Various embodiments of a 16-QAM (quadrature-amplitude-modulation) constellation having one or more subsets of its sixteen constellation points arranged within respective one or more relatively...
US20110182574 METHOD AND APPARATUS OPTIMIZING DECISION THRESHOLD LEVEL OF OPTICAL RECEIVER  
method and apparatus for optimizing a decision threshold of an optical receiver is used to solve a problem of affecting system stability and reliability. The method comprises: determining a...
US20150256270 QUANTUM ENTANGLEMENT COMMUNICATIONS SYSTEM  
Apparatus for transmitting and receiving information using one or more quantum-entangled particles. The apparatus may include a first substrate including a first row of quantum dots and a second...
US20120121273 COMMON BASE CIRCUIT WITH OUTPUT COMPENSATION, CURRENT-TO-VOLTAGE CIRCUIT CONFIGURED WITH COMMON BASE AMPLIFIER, AND OPTICAL RECEIVER IMPLEMENTED WITH THE SAME  
An amplifier implementing with a common base circuit is disclosed. The amplifier includes the common base circuit, a current shunt, and a current supplement. The common base circuit receives an...
US20110280587 PMD Insensitive Direct-Detection Optical OFDM Systems Using Self-Polarization Diversity  
A self-polarization diversity technique to combat PMD in a direct-detection optical OFDM system. This technique does not require any dynamic polarization control, and can simultaneous compensate...
US20100098427 EMI SHROUD FOR A PLASTIC RECEIVE OPTICAL SUBASSEMBLY  
The principles of the present invention provide for a plastic ROSA that has a metallic EMI shroud covering a portion of the plastic ROSA. The combination of the plastic ROSA and the EMI shroud...
US20090269084 LIGHT RECEIVING CIRCUIT AND DIGITAL SYSTEM  
A light receiving circuit (114) includes a light inputting circuit (113) which converts one-system optical signal to be outputted from an optical transmission path (101) to an electrical signal...
US20070212080 Infrared Receiving Unit and Infrared Headphone/Hearing Aid  
There is provided an infrared receiving unit which has an infrared receiver for receiving infrared signals and a transmitter search facility for carrying out an infrared transmitter search. Such...
US20110279660 IR RECEIVER, AND LIQUID CRYSTAL SHUTTER GLASSES HAVING THE SAME  
There are provided an IR receiver and liquid crystal shutter glasses with the same, and more particularly, an IR receiver and liquid crystal shutter glasses having the same to solve the problem in...
US20080285979 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...
US20130039666 Current-controlled CMOS logic family  
Various circuit techniques for implementing ultra high speed circuits use current-controlled CMOS (C3MOS) logic fabricated in conventional CMOS process technology. An entire family of logic...
US20050117916 Digital optical receiving module, and a method for monitoring the signal quality of a transmitted, modulated optical signal  
A digital optical receiving module including: an optical input, a first digital electrical output, an optoelectronic transducer device which converts a modulated optical signal, which is applied...
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...
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...
US20150180582 TRANS-IMPEDANCE AMPLIFIERS (TIA) THERMALLY ISOLATED FROM OPTICAL MODULES  
A system includes a Trans-Impedance Amplifier (TIA) to amplify an input signal from an optical module. The TIA is to interface with the optical module via a transmission line and a reference...
US20110076021 OPTICAL RECEIVER SYSTEMS AND METHODS FOR POLARIZATION DEMULTIPLEXING, PMD COMPENSATION, AND DXPSK DEMODULATION  
A simplified optical receiver architecture capable of tracking and demultiplexing polarization-multiplexed signals, dynamically compensating for PMD using a variety of polarization controller...
US20130336649 ADAPTIVE CONSTELLATIONS AND DECISION REGIONS FOR AN OPTICAL TRANSPORT SYSTEM  
An optical transport system in which (i) an optical transmitter is configured to adaptively change an operative constellation to use a constellation that provides optimal performance...
US20080240737 OPTICAL RECEIVER AND CONTROL METHOD FOR OPTICAL RECEIVER  
An optical receiver converting an optical signal modulated by differential phase shift keying to electrical first and second data signals; generating a clock signal from the first data signal;...
US20080013962 Pulse-Modulated Signal Demodulation Circuit, and Photoreceiver Circuit and Electric Appliance Provided Therewith  
According to the invention, a pulse-modulated signal demodulation circuit has a first integration circuit, a second integration circuit, and a third integration circuit. The first integration...
US20130039665 CLOCK PHASE RECOVERY APPARATUS  
A clock phase recovery apparatus includes a clock estimator for estimating a first clock signal and a second clock signal upon the basis of an input signal, the input signal comprising a first...
US20100054760 Phase Detector Circuit for Clock and Data Recovery Circuit and Optical Communication Device Having the Same  
A high-accuracy phase detector circuit compatible with a 1/N rate architecture is provided. The phase detector circuit has as many as N track-and-hold circuits for tracking and holding N-phase...
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...
US20120134684 Adaptive equalizer, optical receiver, and tap coefficient correcting method  
An adaptive equalizer includes a finite impulse response filter with a predetermined number of taps; and a tap coefficient adaptive controller having a register to hold tap coefficients for the...
US20090208227 OPTICAL APPARATUS AND USE METHOD THEREOF FOR PASSIVE OPTICAL NETWORK SYSTEM  
An optical apparatus receives an upward signal light from a plurality of subscriber units, where the upward signal light is composed of a plurality of time slots corresponding to the plurality of...
US20120057879 DISCRETE BOOTSTRAPPING IN AN OPTICAL RECEIVER TO PREVENT SIGNAL FEEDBACK  
An optical receiver assembly that is configured to avoid the introduction of feedback in an electrical signal converted by the assembly is disclosed. In one embodiment, an optical receiver...
US20080247766 PIN/TIA SYSTEM FOR USE IN FTTx APPLICATIONS  
A system is disclosed for an improved ROSA that has increased sensitivity for permitting greater numbers of ONTs to be connected to an optical network per defined transmission line distances. ROSA...
US20110293293 TRANS-IMPEDANCE AMPLIFIER WITH VARIABLE BANDWIDTH AND DIGITAL COHERENT OPTICAL RECEIVER INSTALLING THE SAME  
A trans-impedance amplifier (TIA) with an adjustable bandwidth is disclosed. The TIA of the present invention includes the amplifying stage and the emitter follower stage arranged in the...
US20120189324 SOFT-INPUT GENERATION FOR SOFT-DECISION FEC DECODING  
A soft-decision forward error correction scheme for received optical signals is described. Differential decoding may be performed, for example, in each polarization after coherent QPSK detection....
US20090285581 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...
US20110116809 PHASE RECOVERY DEVICE, PHASE COVERY METHOD AND RECEIVER FOR 16 QAM DATA MODULATION  
The present invention relates to a phase recovery device, phase recovery method and receiver for 16 QAM data modulation. The phase recovery device comprises: a fourth power calculator for...
US20070297813 Optical Receiving Device  
An optical receiving device for receiving an optical signal (60) from a signal collector (50) comprising a detector (40) for receiving the optical signal (60) form the collector (50) and a signal...
US20080240738 OPTICAL RECEIVER, OPTICAL COMMUNICATION DEVICE, AND OPTICAL SIGNAL RECEIVING METHOD  
An optical receiver including a demodulator to convert an in-phase signal of a received differential phase modulated optical signal into a first electrical signal, and to convert a quadrature...
US20080118252 Optical coupler with reduced pulse width distortion  
An optical coupler having an optical transmitter and an optical receiver are disclosed. The optical transmitter receives a logic signal to be transmitted to a circuit connected to the optical...
US20150093118 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...
US20090041477 ATTENUATION SYSTEMS AND METHODS FOR USE WITH AN OPTICAL DETECTOR IN AN OPTICAL COMMUNICATION SYSTEM  
Systems and methods for use with an optical communication beam are disclosed. The system allows the beam of light to operate at an adequate power level that provides a robust optical link while...
US20080212981 OPTICAL RECEIVER AND VISIBLE LIGHT COMMUNICATION SYSTEM  
A data signal to be transmitted is supplied to a modulator of a transmitter, and the modulator modulates the output of a blue light-excited white LED and outputs blue LED light and phosphor light....
US20130216239 System and Method for Blind Equalization and Carrier Phase Recovery in a Quadrature Amplitude Modulated System  
A system and method for blind equalization of a QAM signal. Equalization is achieved using an algorithm characterized by cost function that is a function the Euclidian distance, e.g. the minimum...
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...
US20140334827 Miniature Pluggable Video Module  
A miniature pluggable video module having a length less than one inch, and a width less than three quarters of an inch, and a plurality of pin connectors attached to the back of the housing. The...
US20120063789 PHOTON DETECTOR  
A photon detection system comprising: an avalanche photodiode; a biasing circuit configured to reverse bias said avalanche photodiode; a first measuring circuit configured to measure avalanche...
US20100329685 OPTICAL DEVICE WITH REDUCED THERMAL TUNING ENERGY  
An optical device that includes multiple optical modulators having actual operating wavelengths at a given temperature is described. Because of differences between the actual operating wavelengths...
US20150249506 OPTICAL RECEIVER AND METHOD OF OPTICAL RECEPTION  
An optical receiver includes a reception module, a first detector, a second detector, a shift module, a first extraction module, and a second extraction module. The reception module receives a...
US20100303473 Receiver and Method for Operating Said Receiver  
A receiver contains a phase demodulator and an electronic dispersion compensator that is electrically connected to the phase demodulator. The phase demodulator contains a delay that is equal to or...
US20120251116 INTEGRATED OPTICAL-ELECTRONIC INTERFACE IN PROGRAMMABLE INTEGRATED CIRCUIT DEVICE  
Systems that provide integrated circuit device circuitry having an integrated optical-electronic interface for high-speed off-device communications are provided. An optical-electronic interface...
US20130272720 INTEGRATED ILLUMINATOR  
An optical device comprising a sealed/closed housing; a light source and/or a detector within the housing; a window through the housing that is transparent to light transmitted from the light...
US20130064556 INTEGRATED ILLUMINATOR  
An optical device comprising a sealed/closed housing; a light source and/or a detector within the housing; a window through the housing that is transparent to light transmitted from the light...
US20080175602 Optical Reception Device  
An optical reception device realizes stabilization of reception sensitivity inexpensively and highly precisely. The optical reception device includes: a Mach-Zehnder type 1-bit delay unit...
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...
US20120177384 SCALABLE WAVEGUIDE-MODE COUPLER FOR AN OPTICAL RECEIVER OR TRANSMITTER  
A waveguide-mode (WM) coupler having a plurality of single-mode fibers, each optically coupled to a different respective waveguide mode of a multimode fiber. The coupling optics employed by the WM...
US20150229281 BANDWIDTH IMPROVEMENT FOR RECEIVERS  
A receiver circuit is provided. The receiver circuit may include an amplifying circuit. The amplifying circuit may include an input node, an output node, and a feedback loop coupled between the...

Matches 1 - 50 out of 391 1 2 3 4 5 6 7 8 >