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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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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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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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... |
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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... |
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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... |
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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;... |
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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... |
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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... |
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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... |
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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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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... |
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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... |
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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... |
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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... |
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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... |
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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.... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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.... |
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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... |
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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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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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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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... |
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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... |