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Burst Optical Signal Receiving Device

Application Number: 20120033980
Publication Date: 2012-02-09
Inventor: Dong, Ke

A burst optical signal receiving device is provided, which includes an optical receiving component and a limiting amplifying circuit unit. The optical receiving component further includes a photodetector, a trans-impedance amplifier, a first direct current (DC) cancellation forbidding circuit, and a DC bias circuit, and the limiting amplifying circuit unit further includes a group of alternating current (AC) coupling capacitors, a limiting amplifier, and a second DC cancellation forbidding ...

OPTOELECTRONIC COMMUNICATIONS ASSEMBLY HAVING AN ELECTRICAL AND OPTICAL INTERFACE

Application Number: 20120033979
Publication Date: 2012-02-09
Inventor: Priyadarshi, Sunil

In one example embodiment, an optoelectronic communications assembly having an optical receiver or an optical transmitter includes an optical interface disposed at an end thereof and through which optical signals are communicated by the optical receiver or optical transmitter. The optoelectronic communications assembly also includes an electronic component and a first electrical interface disposed at the optical interface end of the optical communications assembly and communicatively coupled to ...

OPTICAL MEMORY EXPANSION

Application Number: 20120033978
Publication Date: 2012-02-09
Inventors: Tan, Michael Renne Ty; Morris, Terrel

Various embodiments of the present invention are directed to optical-based methods and expansion memory systems for disaggregating memory of computer systems. In one aspect, an expansion memory system comprises a first optical/electronic interface in electrical communication with a processor, a memory expansion board configured with memory, and a second optical/electronic interface attached to the memory expansion board. The first interface converts optical signals into electronic signals that ...

OPTICAL RELAYING R-TYPE AND GR-TYPE RECEIVER SYSTEM

Application Number: 20120033977
Publication Date: 2012-02-09
Inventor: Yang, Jong Suck

Some embodiments of R/GR type fire alarm control system according to the invention comprises a plurality of detectors/transmitters for issuing alarm signals, a plurality of fire safety equipments for operating under control signals, a plurality of optical repeaters and an R/GR type fire alarm control panel. The optical repeaters are connected to each other in daisy-chain and connected to the plurality of the detectors/transmitters and the fire safety equipments, optically transmits the alarm ...

OPTICAL COMMUNICATION MODULE

Application Number: 20120033976
Publication Date: 2012-02-09
Inventor: Tagami, Yuichi

Provided is an optical communication module including: a surface emitting element configured to convert an electrical signal into an optical signal and emit the optical signal; a lens provided at a predetermined distance from the surface emitting element in a direction along the center of an optical axis of the surface emitting element so that an emission angle from the surface emitting element is 30° or lower, the lens configured to output a first optical signal and a second optical signal; a ...

APPARATUS AND METHOD FOR MOTOR ROTATION CONTROL WITH AN IR RECEIVER

Application Number: 20120033975
Publication Date: 2012-02-09
Inventors: Yoon, Young Kwan; Shin, Suk Ho

A method of controlling a television (TV) mount with a general-purpose remote controller. A signal of the remote controller is intercepted by an infrared ray (IR) receiver, and stored in an internal memory of the IR receiver so as to be used as a control signal of the TV mount. In addition, after a signal is stored the IR receiver in an initial setting mode, the signal may be used as the control signal of the TV mount when a corresponding key of the general-purpose remote controller is ...

OPTICAL COMMUNICATION SYSTEM, OPTICAL COMMUNICATION APPARATUS, AND OPTICAL COMMUNICATION METHOD THEREOF

Application Number: 20120033974
Publication Date: 2012-02-09
Inventors: IKAI, Kazuhito; NAKAISHI, Hiroshi; KANDA, Yasuhisa; NAKAO, Yoshitaka

An optical communication system includes a first optical communication apparatus configured to insert a wavelength control signal in a main signal to produce a modified main signal; convert the modified main signal into a first optical signal; and transmit the first optical signal, and a second optical communication apparatus configured to receive the first optical signal; extract the wavelength control signal from the received first optical signal; determine a wavelength of a second optical ...

Methods And Systems For Increasing Reach And/Or Split In Passive Optical Networks

Application Number: 20120033973
Publication Date: 2012-02-09
Inventors: Trojer, Elmar; Dahlfort, Stefan

Systems and methods according to these exemplary embodiments provide for methods and systems that allow for either reducing signal loss or improving the optical signal strength in a PON for increasing optical signal ...

Hybrid Orthogonal Frequency Division Multiplexing Time Domain Multiplexing Passive Optical Network

Application Number: 20120033972
Publication Date: 2012-02-09
Inventor: Dai, Yuxin

An apparatus comprising a time domain multiplexing (TDM) to Orthogonal Frequency Division Multiplexing (OFDM) or bounded Quadrature Amplitude Modulation (QAM) channels HOT PON converter configured to couple to an optical line terminal (OLT) via an optical fiber and to a plurality of network terminals (NTs) via a point-to-multipoint coaxial cable and configured to transmit TDM data from the OLT using OFDM or bounded QAM channels to the corresponding NTs, wherein the OFDM or bounded QAM channels ...

Multi-Network Compatible Data Architecture

Application Number: 20120033971
Publication Date: 2012-02-09
Inventor: Fourcand, Serge Francois

A backbone network, comprising a network switch configured to communicate data over Ethernet and SONET/SDH interfaces without encapsulating the data. Also disclosed is a backbone network, comprising a plurality of synchronized network switches, wherein the switches are configured to communicate a plurality of time division multiplexed data streams across at least part of the network via a plurality of Ethernet interfaces and a plurality of SONET/SDH interfaces, and wherein the switches are ...

Path Computation Element Method to Support Routing and Wavelength Assignment in Wavelength Switched Optical Networks

Application Number: 20120033970
Publication Date: 2012-02-09
Inventors: Bernstein, Greg; Lee, Young

A network component comprising at least one processor configured to implement a method comprising transmitting a request to compute a routing assignment, a wavelength assignment, or both, wherein the request comprises a lightpath constraint indicator is disclosed. Also disclosed is an apparatus comprising a Path Computation Client (PCC) configured to transmit a request to and receive a reply from a Path Computation Element (PCE), wherein the request comprises a lightpath constraint, and wherein ...

WAVELENGTH PATH MULTIPLEXING AND DEMULTIPLEXING OPTICAL TRANSMISSION APPARATUS

Application Number: 20120033969
Publication Date: 2012-02-09
Inventors: Sakauchi, Masahiro; Nakamura, Shigeru

A sending apparatus includes: a wavelength path multiplexing part; a sending wavelength path selection part; and an optical transmitter having optical sending parts. The wavelength path multiplexing part includes: sending wavelength path demultiplexing ports; and sending wavelength multiplexing ports connected thereto. The sending wavelength path multiplexing ports are connected to optical transmission paths respectively. The sending wavelength path selection part includes a wavelength ...

OPTICAL COMMUNICATIONS NETWORK NODE AND METHOD OF CONTROLLING DATA TRANSMISSION BETWEEN OPTICAL COMMUNICATIONS NETWORK NODES

Application Number: 20120033968
Publication Date: 2012-02-09
Inventors: Testa, Patrizia; Testa, Francesco; Puleri, Marzio; Sabella, Roberto

An optical communications network node (10) comprising an optical transmitter module (16), an optical receiver module (12), an electrical cross-point switch (20) and control apparatus (24, 26). The optical transmitter module (16) comprises optical sources (18) each having a different operating wavelength and each being selectively assignable as an optical circuit switching channel source or an optical burst switching channel source. The optical ...

METHOD, SYSTEM, AND APPARATUS FOR TRANSMITTING IPV6 MESSAGE IN PASSIVE OPTICAL NETWORK

Application Number: 20120033967
Publication Date: 2012-02-09
Inventor: Zheng, Ruobin

Embodiments of the present disclosure provide a method for transmitting an Internet Protocol version 6 (IPv6) message in a Passive Optical Network (PON). The method includes: receiving a Router Advertisement (RA) message comprising Optical Line Terminal (OLT) port information, Optical Network Unit (ONU) port information, and an IPv6 address prefix; binding the IPv6 address prefix with an OLT port indicated by the OLT port information; and sending the RA message to an ONU through the OLT port, ...

OPTICAL LEAKY INTEGRATE-AND-FIRE NEURON

Application Number: 20120033966
Publication Date: 2012-02-09
Inventors: Rosenbluth, David; Prucnal, Paul R.; Kravtsov, Konstantin

An optical system includes an optical integrator, a readout mechanism, and an optical thresholder. The optical integrator is configured to perform temporal integration of an optical input signal having a first wavelength received at an input. The readout mechanism is coupled to the optical integrator and provides optical signals having a second wavelength to the optical integrator for measuring a state of the optical integrator. The optical thresholder is coupled to an output of the optical ...

Method and Apparatus for Broadband Carrier Frequency and Phase Recovery in Coherent Optical System

Application Number: 20120033965
Publication Date: 2012-02-09
Inventors: Zhang, Zhuhong; Li, Chuandong; Bai, Yusheng; Zhu, Fei

A digital apparatus comprising a fast Fourier transform (FFT) module configured to transform a time domain optical signal into a frequency domain optical signal, a circular shifter coupled to the FFT module and configured to provide coarse frequency offset compensation to the frequency domain optical signal based on an estimated frequency offset; and a frequency offset estimation module coupled to the circular shifter and configured to provide the estimated frequency offset based on a power ...

METHOD AND APPARATUS FOR CONTROL OF DPSK AND DQPSK RECEIVERS AND TRANSMITTERS

Application Number: 20120033964
Publication Date: 2012-02-09
Inventor: MAMYSHEV, Pavel

An optical communication device such as a transmitter or receiver has a control loop for controlling relative phase of two related optical signals based on signal peak intensity. An optical transmitter measures the signal peak intensity of a combined optical signal representing two data channels to adjust relative phase as desired. An optical receiver measures the signal peak intensity of combined electrical signals, single electrical signals or single optical signals to adjust relative phase ...

OPTICAL SUBSCRIBER TERMINATING DEVICE, PON SYSTEM, AND ABNORMALITY DETECTING METHOD

Application Number: 20120033963
Publication Date: 2012-02-09
Inventors: Mie, Kaori; Nose, Hideki

An ONU that receives a discovery gate transmitted by an OLT in a predetermined cycle, returns a response signal in response to the discovery gate, and receives a unicast frame transmitted to the ONU by the OLT having received the response signal, comprising: a received frame detecting unit that detects whether a signal received from the OLT is a discovery gate or a unicast frame; and an erroneous emission detecting unit that detects an abnormal emission state, based on a result detected by the ...

Four Wave Mixing Suppression

Application Number: 20120027421
Publication Date: 2012-02-02
Inventors: Meyrueix, Paul; Huang, Wei; Chen, Li-Ping

Methods, systems and computer program products for countering the effects of four wave mixing are described. In one implementation, a controller can be used to shift an operating wavelength of an optical transmitter away from a zero-dispersion wavelength through which signals of the optical transmitter are transmitted. The controller can perform the shifting process while allowing sufficient margin for division multiplexing and minimal dispersion. The controller may determine an appropriate ...

METHOD AND APPARATUS FOR GENERATING OPTICAL DUO BINARY SIGNALS WITH FREQUENCY CHIRP

Application Number: 20120027420
Publication Date: 2012-02-02
Inventor: Bai, Yu Sheng

This present disclosure provides an optical transmission method and system. The system includes a pre-coder for pre-coding an input signal into a first pre-coded signal, an encoder/separator coupled to the first pre-coded signal and arranged to encode the first and second pre-coded signals into a first encoded signal with 0 degree phase shift and a second encoded signal with 180 degree phase shift, and an optical modulator for providing optical modulation to the first and second encoded signals ...

FRAME/SYMBOL SYNCHRONIZATION IN COHERENT OPTICAL OFDM

Application Number: 20120027419
Publication Date: 2012-02-02
Inventors: Kaneda, Noriaki; Pfau, Timo; Yang, Qi

One aspect provides an optical communication system. The system includes an optical-to-digital converter, a frequency estimator and a symbol synchronizer. The optical-to-digital converter is configured to receive an optical OFDM bit stream including an OFDM symbol bearing payload data and a symbol header preceding the OFDM payload data. The frequency estimator is configured to determine a carrier frequency offset of the payload data from the symbol header. The symbol synchronizer is configured ...

Equalizer for an Optical Transmission System

Application Number: 20120027418
Publication Date: 2012-02-02
Inventors: Forestieri, Enrico; Secondini, Marco

An equaliser (60) processes, in the electrical domain, a signal obtained from a path of an optical transmission system. The equaliser comprises N cascaded stages (where N≧1). At least one of the stages comprises a cascade of a linear equalisation element (61) and a non-linear equalisation element (62). The equaliser (60) is able to compensate for both linear impairments, such as dispersion, and non-linear impairments. The cascaded linear and non-linear elements can ...

OPTICAL POWER DIVIDER

Application Number: 20120027417
Publication Date: 2012-02-02
Inventors: Li, Jingjing; Tan, Michael Renne Ty; SANTORI, Charles M.

An optical power divider includes a body having a first side and a second side. The first side includes at least one cylindrical input lens and the second side includes an array of output lenses. The at least one cylindrical input lens is configured to expand input light along a first axis to be directed to a plurality of the output lenses arranged along the first axis and the output lenses are configured to focus the light received from the input lenses into respective output beams of ...

NETWORK INTERFACE DEVICE FOR OPTICAL PREMISES SIGNALS AND NETWORKS

Application Number: 20120027416
Publication Date: 2012-02-02
Inventors: Forbes, Eric S.; Rollins, William E.; Mallya, Arvind Ramdas

A network interface device (NID) demarcates an access network and a premises network. The NID receives a broadband signal via an access network and transmits optical device signals to pieces of premises equipment. The broadband signal may be a single-mode fiber (SMF) optical signal transmitted over an SMF cable. In these embodiments, the NID may include a transponder including a first stage to convert the SMF signal to an intermediate electrical signal and a second stage to convert the ...

BURST MODE OPTICAL MEDIA CONVERTER WITH FAST ANALOG CONVERSION

Application Number: 20120027415
Publication Date: 2012-02-02
Inventors: Boldrin, Clete M.; Chan, Eric Y.; Truong, Tuong Kien; Lawrence, William Earl

A media converter for interfacing an optical fiber bus to an electrical interface of an electronic device is described. The media converter includes an interface circuit configured to convert electrical signals received from a transmitting channel of the electrical device in a voltage doublet format to positive logic electrical pulses and convert received electrical signals for application to a receiving channel of the electrical device from positive logic electrical pulses to a voltage doublet ...

Transparent Clocks in Access Networks

Application Number: 20120027414
Publication Date: 2012-02-02
Inventor: Wei, Dong

An apparatus comprising a device at an access node (AN) comprising an interface, a Precision Time Protocol (PTP) engine, and a timestamp module, and a second device at a customer premise node coupled to the AN and comprising a second interface, a second PTP engine, and a second timestamp module, wherein the device at the AN is configured to send a PTP event message to the device at the customer premise node to implement a transparent clock (TC) scheme, wherein the PTP engine is configured to ...

High-Speed Transmission System for Optical Channels

Application Number: 20120027413
Publication Date: 2012-02-02
Inventor: Agazzi, Oscar E.

A method and apparatus for transmission of data on bandwidth limited fiber optic channels. A multilevel signaling alphabet having multiple levels of optical intensity are used to transmit signals on optical channels. In order to counteract the decrease in signal to noise ratio resulting from the use of a multilevel signaling alphabet over a bilevel signaling alphabet trellis encoding of the data to be transmitted is employed. To counteract intersymbol interference due to signaling faster than ...

Electronic Compensation of Nonlinearity in Optical Communication

Application Number: 20120027412
Publication Date: 2012-02-02
Inventors: Hayee, M. Imran; Ahmed, Nisar

In various embodiments, electronic apparatus, systems, and methods include electronic compensation of nonlinearity in optical communication. Additional apparatus, systems, and methods are ...

PASSIVE OPTICAL NETWORK USER TERMINAL AND METHOD OF POWER SUPPLY CONTROL AND POWER SUPPLY STATE REPORTING FOR THE SAME

Application Number: 20120027411
Publication Date: 2012-02-02
Inventors: Gao, Hai; Dong, Yinghu

The present disclosure discloses a passive optical network (PON) user terminal comprising a passive optical network interface unit (PONIU) having access to a PON system, a service data distribution unit (SDDU) connected to the PONIU for distributing service data, a plurality of service processing units (SPUs) for receiving and accordingly processing the service data distributed by the SDDU, a power source for providing power to the above units, and a power supply control unit (PSCU) for ...

METHOD, DEVICE AND SYSTEM FOR GENERATING AND RECEIVING A PHASE POLARIZATION MODULATED SIGNAL

Application Number: 20120027410
Publication Date: 2012-02-02
Inventors: Xu, Xiaogeng; Liu, Lei

In the field of communications transmission, a method, a device, and a system for generating and receiving a phase polarization modulated signal are disclosed. The device for generating the phase polarization modulated signal includes: a Laser Diode (LD), a time division demultiplexer, a phase precoding module, a phase modulating module, a polarization precoding module and a polarization modulating module. The device for receiving the phase polarization modulated signal includes: an optical ...

FEMTOCELL-BASED MESH NETWORK WITH OPTICAL INTERCONNECT FOR 4-G MULTIMEDIA COMMUNICATIONS

Application Number: 20120027409
Publication Date: 2012-02-02
Inventors: Agrawal, Dharma P.; Weragama, Nishan S.; Li, Hailong

A network architecture for integrating a 4G wireless mesh network (WMN) with a 3-G network in order to effectively support multimedia communication is described. In one embodiment of the present invention, a wireless mesh network system comprises a plurality of routers each having a wireless optical interface; at least one base station having Internet backhaul and connecting to a wireless optical device; a computer media storing instructions for assigning at least one of the plurality of ...

DIRECTIONLESS AND COLORLESS RECONFIGURABLE OPTICAL ADD/DROP MULTIPLEXER

Application Number: 20120027408
Publication Date: 2012-02-02
Inventors: Atlas, Dogan; Wu, Xiaoping

The invention relates to a directionless and colorless reconfigurable optical add/drop multiplexer (ROADM) for a number of clients comprising:

an add/drop interface for optical signals of at least one optical network,
wherein each received optical signal is split by at least one optical splitter into optical signals which are applied to a downstream cross connector distributing the ...

METHOD AND DEVICE FOR SENDING UPSTREAM TRANSFER FRAME IN PASSIVE OPTICAL NETWORK

Application Number: 20120027407
Publication Date: 2012-02-02
Inventors: Feng, Dongning; Li, Jing; Liang, Weiguang; Geng, Dongyu; Effenberger, Frank

The present disclosure relates to the Passive Optical Network (PON) technology, and a method for sending an upstream transfer frame in a PON is provided, so as to improve flexibility of a system and satisfy a requirement that an error probability is reduced as low as possible. The method includes: after success of link, sending a preamble according to an allocated time slot, sending a burst synchronization delimiter, and then sending successively a burst header, a Gigabit-Capable Passive ...

METHOD AND DEVICE FOR DETECTING DISPERSION, OPTICAL SIGNAL TRANSMISSION SYSTEM

Application Number: 20120027406
Publication Date: 2012-02-02
Inventors: LIU, Yue; FU, Wei; TAO, Zhihui; LI, Lijun

The present invention discloses a method for detecting dispersion, overcoming disadvantages of complex configuration and insensitivity to a tiny dispersion of the method and device for detecting dispersion in the prior art. The inventive method includes: obtaining a signal within a predetermined bandwidth range from an optical signal received; obtaining an operated value of power via an operation on the signal within the predetermined bandwidth range; and obtaining amount of system dispersion ...

METHOD AND APPARATUS FOR SYNCHRONIZING TIME IN A PASSIVE OPTICAL NETWORK

Application Number: 20120027405
Publication Date: 2012-02-02
Inventor: ZHENG, Ruobin

A method and apparatus for synchronizing time in a Gigabit Passive Optical Network (GPON) in which an Optical Line Terminal (OLT) sends a downstream frame including a Physical Control Block downstream (PCBd) field and a payload field to an Optical Network Unit (ONU); the OLT determines a time value associated with a certain bit in the PCBd field of the downstream frame; and the OLT sends an Operation, Administration and Maintenance (OAM) message defined by a GPON protocol carrying the time ...

PHASE NOISE COMPENSATION IN COHERENT OPTICAL COMMUNICATIONS SYSTEMS

Application Number: 20120027404
Publication Date: 2012-02-02
Inventors: Forestieri, Enrico; Colavolpe, Giulio; Secondini, Marco; Foggi, Tommaso; Poti, Luca; Meloni, Gianluca

A method (10) of compensating phase noise in a coherent optical communications network. The method comprises: receiving a traffic sample (12); receiving an optical carrier and determining a phase noise estimate for the optical carrier (14); and removing the phase noise estimate from the traffic sample to form a phase noise compensated traffic sample ...

COMMUNICATION CLOCK TRANSPORT METHOD AND DEVICE

Application Number: 20120027403
Publication Date: 2012-02-02
Inventors: DARR, Roger R.; NICHOLS, Jeff

A method and apparatus for timing an output signal based on timing of an input signal is provided. A method includes determining a first clock rate derived from the input signal during a first time interval measured by a reference clock. The method also includes signal processing logic to determine a second clock rate during a second time interval based on an error signal that is calculated as a difference between the first clock rate multiplied by the second time interval and a previous value ...

In-Band Optical Frequency Division Reflectometry

Application Number: 20120027402
Publication Date: 2012-02-02
Inventor: Effenberger, Frank J.

An apparatus comprising an optical transmitter coupled to an optical fiber, and an optical receiver coupled to the optical fiber, wherein the transmitter is configured to transmit a test signal data pattern and user data into the optical fiber, and wherein the receiver is configured to receive a reflection of the test signal data pattern. Also disclosed is a network component comprising a processor configured to implement a method comprising promoting the transmission of an optical test signal ...

RELATING TO SIGNAL PROCESSING

Application Number: 20120027401
Publication Date: 2012-02-02
Inventors: Wood, John Michael; Pescod, Christopher Ralph

A method of sampling a radio frequency signal comprises: receiving the radio frequency signal; modulating an optical signal with the radio frequency signal and an oscillator signal to generate a modulated signal; applying a filter to the modulated signal to generate an intermediate frequency signal, the filter having an intermediate pass band and an intermediate roll-off, the intermediate pass band and the intermediate roll-off in combination defining a intermediate frequency band having a ...

FAST OPTICAL RECEIVER FOR UNENCODED DATA

Application Number: 20120027400
Publication Date: 2012-02-02
Inventor: CHRISTENSEN, Steen Bak

The invention relates to a method and an optical receiver implementing this method suitable for robustly receiving unencoded optical data. The method set the threshold for the receiver using values relating to the high and low values of a binary signal. However, for some data patterns these values may not be accurately determined, such as for extended periods of constant high or low values being transmitted. In this case the method, in one embodiment, assumes that the extinction ratio of the ...

Concurrent Infrared Signal, Single Thread Low Power Protocol and System for Pet Control

Application Number: 20120025949
Publication Date: 2012-02-02
Inventor: Reed, Matthew H.

A method and system for a concurrent infrared signal, single thread low power protocol comprises transitioning a remote signal during a first fraction of a bit-period and transitioning another remote signal during a later equal fraction of another bit-period. Additionally, the method includes receiving and decoding two remote signals as a single overlapping signal thread. The disclosed system comprises multiple identifying (ID) remote transceiver units, a pet collar for each ID unit and a base ...

RECEIVING DEVICE AND DEMODULATION DEVICE

Application Number: 20120020677
Publication Date: 2012-01-26
Inventors: Amamiya, Yasushi; Noguchi, Hidemi; Yamase, Tomoyuki; Abe, junichi

To adequately perform sampling, a receiving device that solves problems that involve an increase in circuit area and an increase in cost, is provided.

A/D converter 2 samples a coherent signal that is an analog signal in synchronization with a sampling clock signal so as to convert the analog signal into a digital signal. DSP 3 demodulates the digital signal converted by A/D converter 2 and computes a phase of the sampling clock signal in which ...

APPARATUS FOR RECEIVING OPTICAL SIGNAL AND METHOD OF CONTROLLING PHASE OFFSET FOR DIFFERENTIAL QUADRATURE PHASE SHIFT KEYING

Application Number: 20120020676
Publication Date: 2012-01-26
Inventors: Chang, Sun-Hyok; Kim, Kwang-Joon; Chung, Hwan-Seok; Lee, Jyung-Chan

An apparatus for receiving optical signals in DQPSK and method of controlling a phase offset in receiving optical signals for DQPSK is provided. An original optical signal modulated in DQPSK is received. The original optical signal is delayed by one bit to make a delay optical signal such that an interference on the original optical signal and the delay optical signal is performed. A control signal is generated by use of an interference result between the original optical signal and the delay ...

Method for Energy Efficient Pulsing Operation of Transceivers of a Networked Device

Application Number: 20120020675
Publication Date: 2012-01-26
Inventors: Gravel, Mark; Dove, Daniel Joseph; CHUANG, Keng Hua; Tan, Yee Hong; Chee How, Lawrence Lee

A method performed by a networked device for energy efficient operation of an optical transceiver of the networked device is described herein. It is determined whether a port control of the networked device is enabled to operate in an energy efficient state. Where the port control is enabled to operate in the energy efficient state and an absence of a valid receive energy from a link partner is determined, a laser transmitter of the optical transceiver is pulsed by asserting and de-asserting a ...

STATUS LINK FOR MULTI-CHANNEL OPTICAL COMMUNICATION SYSTEMS

Application Number: 20120020674
Publication Date: 2012-01-26
Inventors: Cole, Christopher R.; Douma, Darin James; Aronson, Lewis B.

A robust and redundant status link is established by a first multi-channel optoelectronic device with a second multi-channel optoelectronic device in a multi-channel communication link. Transmitter bias currents are effectively modulated with a status link modulation signal representative of status data and subsequently modulated with primary data modulation signals. The resulting signals are transformed into optical signals and transmitted over the link as main communication links combined ...

OPTICAL BACKPLANE

Application Number: 20120020673
Publication Date: 2012-01-26
Inventors: Brunner, Robert; Julien, Martin

The invention relates to an optical backplane, comprising a plurality of component connectors and at least two interconnections configurations interconnecting the component connectors. The at least two interconnections configurations allow a dynamical selection of an interconnections configuration interconnecting the component ...

OPTICAL TRANSCEIVER HAVING AN OTDR MODE, AND A METHOD OF OBTAINING TEST DATA FOR TESTING AN OPTICAL FIBER

Application Number: 20120020672
Publication Date: 2012-01-26
Inventor: Aguren, Jerry G.

An optical transceiver has a communications mode and an optical time domain reflectometer (OTDR) mode. The transceiver comprises a transmitter channel and a receiver channel operable, in the communications mode, to respectively transmit and receive communications signals through respective external optical fibers. The transceiver also comprises a guide arrangement for guiding, in the OTDR mode, a reflected OTDR signal along a path from the transmitter channel into the receiver channel. A method ...

BI-DIRECTIONAL PARALLEL OPTICAL LINK

Application Number: 20120020671
Publication Date: 2012-01-26
Inventors: Verdiell, Jean-Marc; Kirkpatrick, Peter; Peeters Weem, Jan P.; Epitaux, Marc

A system is disclosed. The system includes a first optical transceiver having a first set of transmitters and a first set of receivers and a second optical transceiver having a second set of transmitters coupled anti-symmetrically to the first set of receivers of the first optical transceiver and a second set of receivers coupled anti-symmetrically to the first set of transmitters of the first optical ...

METHOD AND SYSTEM FOR HIGH PRECISION GPS APPLICATIONS

Application Number: 20120020670
Publication Date: 2012-01-26
Inventors: Larochelle, Sophie; Macias-Valadez, Daniel; Santerre, Rock

A GPS system for obtaining data from a GPS signal received at a plurality of antenna stations, each antenna station being connected to a common receiver station through an optical fiber link The system includes a light generating module at the receiver station generating an optical reference signal, and an antenna station module at each antenna station. The antenna station modules modulate the optical reference signal according to the GPS signal received, obtaining a twice modulated optical ...

METHOD AND SYSTEM FOR CHARACTERIZING AN OPTICAL DEVICE

Application Number: 20120020669
Publication Date: 2012-01-26
Inventors: MARGRAF, Michael; LEONHARDT, Christoph Clemens; MATISS, Andreas

An embodiment of the invention relates to a system comprising an optical device (10) and an evaluation device (20) for characterizing the optical device. The optical device comprising a 90° optical hybrid unit (30) having a first and second optical input (30E1, 30E2) and at least two optical outputs (30A1-30A4) wherein optical output signals (So1-So4) leaving the optical outputs have optical phase differences ...