|
Match
|
Document |
Document Title |
|
|
7620331 |
Receiver circuit having an optical receiving device
The invention relates to a receiver circuit having an optical receiving device, a plurality of amplifiers that are connected to the receiving device, and circuit means or a control circuit for...
|
|
|
7620328 |
Multi-wavelength optical CDMA with differential encoding and bipolar differential detection
The present invention relates generally to an optical CDMA transmission system and method employing differential optical encoding and bipolar decoding. Differential encoding and bipolar decoding...
|
|
|
7609982 |
RZ-DPSK optical receiver circuit
A received RZ-DPSK signal is guided to an interferometer. The interferometer comprises a 1-bit delaying element in an upper arm. A balanced photodiode converts a pair of optical signals output from...
|
|
|
7609980 |
Optical receiver and discrimination-threshold generating method
A first average detecting circuit detects an average of output signals of a pre-amplifying unit that controls an amplification gain based on a result of comparison between an output of the first...
|
|
|
7606504 |
Optical receiver and optical receiving method corresponding to differential M-phase shift keying system
An optical receiver comprises branching units for branching and supplying the signal lights to be inputted to the first to fourth optical waveguides provided on a substrate, second to third optical...
|
|
|
7603043 |
Light receiving element circuit and optical disk drive
According to one embodiment, a plurality of light receiving elements photoelectrically convert light signals having information signals, respectively. A plurality of first amplification circuits...
|
|
|
7596322 |
Cryptographic-key-generation communication system
In a cryptographic key distribution system by the phase modulation using a single photon state or a faint LD light, there is required an interferometer independent on polarization and stabilized...
|
|
|
7596323 |
Optical communications systems, devices, and methods
A method and apparatus for estimating fiber dispersion in an optical communication system including transmitting an optical signal carrying a unique word along an optical communication path,...
|
|
|
7574143 |
All-optical signal processing method and device
A device for processing of an optical input signal includes at least a first data signal. A first optical resonator provides a reference signal by optical filtering of the optical input signal. The...
|
|
|
7561813 |
Wide field of view heterodyne receiver
A wide field of view heterodyne receiver is provided for enhancing mixing efficiency of a returned signal with a local oscillator signal to generate a heterodyned signal. The returned signal...
|
|
|
7561805 |
Optical transmitter, optical receiver, optical communication system, and optical transmitter and receiver
An optical transmitter has a case. The case houses a laser beam generator, a lens, a cooler, and a high heat conductivity member. The lens concentrates the laser beam generated by the laser beam...
|
|
|
7561812 |
Optical receiver with matched photodetector capacitance
An optical receiver has a voltage supply, a first node, and a second node. A first input of a differential amplifier is coupled to the first node and a second input of the differential amplifier is...
|
|
|
7558489 |
Method and apparatus for monitoring the power level of two or more optical transmitters
Methods and apparatus for monitoring the power level of one or more optical emitters are provided. In some embodiments, optical signals from two or more optical emitters are directed at different...
|
|
|
7558490 |
Resonant detector for optical signals
An electronic receiver for decoding data encoded into light is described. The light is received at an ultra-small resonant structure. The resonant structure generates an electric field in response...
|
|
|
7555217 |
Multi wavelength electromagnetic device
An optical antenna assembly including multiple optical antenna elements, each of the optical antenna elements are arranged in a regular pattern and carried by a supporting body. The regular pattern...
|
|
|
7546037 |
Topologically 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....
|
|
|
7532826 |
Optical demultiplexer and receiver assembly
Apparatus for demultiplexing a wavelength division multiplexed optical signal comprising a plurality of signals each having a different wavelength. The apparatus comprises a demultiplexer...
|
|
|
7520683 |
Optical module
To provide a small-sized and reliable optical module in which a light emitting element and an optical function element respectively remarkably different in a coefficient of thermal expansion are...
|
|
|
7520680 |
Light-receiving element, manufacturing method for the same, optical module, and optical transmitting device
To provide a light-receiving element that is capable of high-speed operation and includes an optical element with controlled setting position, shape and size, a manufacturing method for the...
|
|
|
7502566 |
Light-emitting module
A light-emitting module outputting laser beam emitted from a semiconductor light-emitting element via a lens, the light-emitting module includes a first main plane, a mount portion on the first...
|
|
|
7486896 |
Optical clock recovery
The invention relates to clock recovery in optical communication systems. Optical clock frequencies are recovered from a plurality of optical channels by using a single optical resonator. The...
|
|
|
7483642 |
Receiver for OTDM/PDM optical signals
A receiver for an OTDM/PDM pulse train ( 10 ) in which the pulses ( 12 ) have alternating polarizations (P 1, P 2 ) has a polarization insensitive optical switch ( 16; 161, 162, 163, 164 ) for...
|
|
|
7450862 |
Stray light insensitive detector system and amplifier
A detector system for a fiber optic component is insensitive to stray light. Specifically, the invention comprises a detector chip, which converts received light into an electric signal. A baffle...
|
|
|
7421212 |
Detecting and locating pulses using a Bragg cell
Detecting a pulse of a signal includes receiving the signal and a light beam. The signal drives a spatial light modulator to modulate the light beam, where the complex amplitude of the modulated...
|
|
|
7415212 |
Data communication system, data transmitter and data receiver
A transmitter formed of two or more light-emitting sections such as LEDs, which are physically arranged in a predetermined manner, is disposed in the real world object, and each light-emitting...
|
|
|
7411725 |
Optical signal demodulator
A demodulator includes: a Michelson interferometer having: a half-mirror which splits an optical signal, emits a first split light to a first optical path, and emits a second split light to a...
|
|
|
7406263 |
Combined wavefront sensor and data detector for a free space optical communications system with adaptive optics
In an adaptive optics module, wavefront sensing and data detection are implemented in a single device. For example, an optical-to-electrical converter converts a data-encoded optical beam to an...
|
|
|
7394995 |
System and method for a compact optical receiver with wide dynamic range
An optical receiver is disclosed comprising an erbium-doped fiber amplifier (EDFA) that is coupled to a photodiode and transimpedance amplifier without filtering output light signal in the EDFA....
|
|
|
7376359 |
Digital regulated light receive module and regulation method
The invention discloses a digital adjusting method for an optical receiver module, and the method implements real-time monitor of parameters, on-line adjustment and non-linear compensation. The...
|
|
|
7366428 |
Optical receiver
An optical receiver includes a light-receiving part and a control part. The light-receiving part includes an APD, a PIN-PD, and a branching optical device. First signal light is incident on the...
|
|
|
7348551 |
Remote-control light receiving unit and electronic apparatus using the same
A remote-control light receiving unit includes a remote-control light receiving unit body having a lens portion, and a light guiding member that guides transmission signal light received from a...
|
|
|
7343104 |
Apparatus and method for receiving a quadrature differential phase shift key modulated optical pulsetrain
An optical differential phase shift key (DPSK) receiver, a method of demodulating an optical DPSK modulated signal and an optical processor capable of operating as either a DPSK receiver or DPSK...
|
|
|
7330657 |
Method to demultiplex wavelengths of light
An apparatus and method for demultiplexing multiple wavelengths of light. In one embodiment, an optical signal having a plurality of wavelengths is provided to an optical-to-electrical (OE) circuit...
|
|
|
7315698 |
Optical module and an optical receiver using the same
The present invention provides an optical receiver that uses an avalanche photodiode (APD) whose multiplication factor m is controlled to compensate the temperature dependence thereof. An optical...
|
|
|
7310473 |
Optical antenna and wireless optical system using the same
A light concentrator for an optical antenna gradually narrows from the light receiving end to the end in contact with a light detector, and has a refractive index that gradually increases from the...
|
|
|
7305191 |
Optical correlator system and supporting method and apparatus
Multiple electrical signals (from, for example, multiple signal sources such as antennas) are converted by an electrical signal input ( 24 ) into corresponding optical signals. In one embodiment...
|
|
|
7298534 |
Off-axis holographic light concentrator and method of use thereof
A light receiving apparatus comprises a holographic optical device having a plurality of holograms recorded in a light receiving surface thereof. The holographic optical device is configured to...
|
|
|
7280770 |
Polarization diverse optical receiver using a polarization-dependent beam splitter
A receiver and method for using the same to process optical signals is disclosed. The receiver includes an optical coupler and a polarization dependent beam splitter. The optical coupler combines...
|
|
|
7272327 |
Multi-detector detection of optical signals
Use in an optical communications system of multiple detectors to separately detect respective multiple spectral modes of a received optical signal. The invention also provides for corresponding...
|
|
|
7269360 |
High dynamic receiver for free space optics application
A receiver for an optics telecommunication system, the receiver comprises a first receiving device and means for focusing a received light beam carrying a signal towards such first receiving...
|
|
|
7257334 |
Device to detect or generate optical signals
The present invention relates to a device for detecting or generating and modulating optical signals, and having an angular dispersive element arranged to change angles of the optical signals or...
|
|
|
7254343 |
Method and apparatus for data recovery in an optical transmission system
Method and apparatus for reducing intra-channel distortions of received data resulting from non-linear signal propagation includes parallel detection subcircuits for determining output values of...
|
|
|
7215889 |
Compact optical transceivers for host bus adapters
An optical transceiver is provided that includes a transceiver substrate arranged substantially perpendicular to longitudinal axes respectively defined by a transmit optical subassembly and receive...
|
|
|
7209671 |
Multiple detector decision receiver
An optical signal receiver including a plurality of threshold decision circuits configured to receive an electrical signal representative of the optical signal. Each of the threshold decision...
|
|
|
7209670 |
Polarization diversity receiver for optical transmission system
A polarization diversity receiver has an optical section for converting the received optical signal into four or five polarization diverse component optical signals that substantially represent...
|
|
|
7203429 |
Optical transmission system using optical signal processing in terminals for improved system performance
An optical communication system configured to operate with optical signals at lower signal to noise ratios than previously contemplated. The communication system includes a receiver having an...
|
|
|
7200344 |
Receiver and method for a multichannel optical communication system
A method and system for transmitting information in a wavelength division multiplex (WDM) or other suitable multichannel optical communication system includes receiving a multichannel signal having...
|
|
|
7190908 |
Optical differential quadrature phase-shift keyed decoder
A differential quadrature phase shift keyed system includes a fiber optic source and a first fiber optic differential phase shift keyed demodulator coupled to the fiber optic source having a first...
|
|
|
7187871 |
Interferometric communication system and method
High bandwidth angle modulated communications may be obtained using an incoherent/broadband “white light” source. The light is passed through interferometer arms before and after a...
|
|
|
7177550 |
On-axis laser receiver wavelength demultiplexer with integral immersion lensed detectors
The present invention is directed to a laser communication receiver for wireless optical communication. A laser communication receiver includes a diffractive optical element to permit detectors at...
|