Optical communications inventions

20090279885 - Control circuit for optical transmitter/receiver: A control circuit for an optical transmitter/receiver that transmits/receives an optical signal, comprises: a memory having a digital value storage area and an area that stores limit values; a register; an analog/digital conversion circuit that receives analog signals indicating operating parameters of the optical transmitter/receiver, converts the analog signals to... Agent: Leydig Voit & Mayer, Ltd

20090279886 - Burst-mode data recovery for multi-gigabit passive optical networks: In a TDMA optical network, a clock data recovery module uses signal oversampling and preamble correlation together with enhanced performance modules to extract additional data from the upstream transmission signal. Information including duty cycle, ONT power estimation, signal noise and jitter can be extracted from the upstream signal using digital... Agent: Rg And Associates

20090279887 - Systems and methods for wavelength scanning of in-service wavelength division multiplexing systems: A testing input module for testing an in-service WDM system is provided. The testing input module includes a first light source configured to emit a first light signal to one or more empty channels of the in-service WDM system; and a tunable second light source configured to emit a second... Agent: Verizon Patent Management Group

20090279888 - Alien wavelength channel balancing and line amplifier optimization: An algorithm is disclosed for performing alien-wavelength channel balancing on channels between optical network elements within an optic-fiber communications system. The algorithm determines initial values of various optimization parameters for each of the channels, such as the input launch power and operating conditions of optical amplifiers in the optical path,... Agent: Garlick, Harrison & Markison (alu)

20090279889 - Method and apparatus for transporting computer bus protocols over an optical link: A system is provided for implementing PCI Express protocol signals over an optical link. A transmission circuit is used to provide an electrical-to-optical conversion, a receiving circuit provides an optical-to-electrical conversion, and a sideband circuit is used to provide and receive control information.... Agent: Courtney Staniford & Gregory LLP

20090279890 - Method of determining an optical distance for chromatic dispersion compensation: A method of determining an optical distance between two nodes of an optical network for chromatic dispersion compensation includes using existing optical supervisory channel components in each node to measure the “time-of-flight” of an optical signal having a known wavelength. The effective optical distance is determined based on the time-of-flight... Agent: Patterson & Sheridan, LLP

20090279891 - All-optical wavelength conversion for a polarization multiplexing optical signal: An apparatus includes a first laser source for providing a first lightwave; a first optical coupler that is polarization maintaining for dividing the first lightwave into first and second optical carrier lightwaves; first and second modulators for modulating respective ones of the first and second carrier lightwaves with information; a... Agent: Nec Laboratories America, Inc.

20090279892 - Optical network device generating multi-channel: Disclosed herein is an optical network device for generating a multi-channel. The optical network device is connected to a plurality of sectors. Each of the sectors has one or more subscriber terminals as component members, divides a frequency band assigned to a wired network, and provides resulting frequency bands to... Agent: Merchant & Gould PC

20090279893 - Analog finite impulse response filter: According to one embodiment of the invention, a programmable finite impulse response (FIR) filter is implemented with differential isolation circuits to isolate parasitic capacitance from attenuating an output signal at both a first and second differential output terminals of the FIR filter. The FIR includes a track and hold circuit... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090279894 - Triple wavelength bidirectional optical communication system: A triple wavelength bidirectional optical communication system includes an optical fiber, a transmitter optical subassembly and a receiver optical subassembly. The transmitter optical subassembly includes a first filter, a dual wavelength laser device and a first detector device. The dual wavelength laser device emits a first and a second laser... Agent: Hdls Patent & Trademark Services

20090279895 - Frequency doubler, signal generator, optical transmitter, and optical communication apparatus: An input unit receives input of a clock signal having a voltage that varies continuously. A supply unit supplies a constant reference voltage. A selector outputs a clock signal having voltage that is changed alternately each time the voltage of the clock signal input from the input unit shifts across... Agent: Staas & Halsey LLP

20090279896 - Passive optical network transceiver with temperature compensation circuit: A passive optical network transceiver includes an avalanche photodiode, a bias voltage generator for supplying a bias voltage to the avalanche photodiode, a temperature detector for measuring the operating temperature of the avalanche photodiode, a memory for storing one reference bias voltage and a processing circuitry to process the value... Agent: Emcore Corporation

20090279897 - Transmission method, transmitter-receiver, and transmitting-receiving system: A transmitter-receiver having a means for automatically determining the status of transmission medium such as optical fiber, and a means for automatically setting and resetting the transmission rate and/or output power according to the status of the transmission medium, a transmission loss and gain measurement method, and a transmitting-receiving system.... Agent: Sughrue Mion, PLLC

20090279898 - Bi-directional optical device for use in fiber-optic communications: A bi-directional optical device includes: a TO cap; a TO header defining a receiving space together with the TO cap; a laser chip provided on the TO header and in the receiving space; and a light-receiving chip provided on the TO header and in the receiving space. The TO cap... Agent: Raymond Sun

20090279899 - Non-contact transmission of optical signals: The present embodiments relate to non-contact transmission of optical signals by an optical waveguide which is provided with a material of which the electron arrangement is able to be put into population inversion. In a first variant, energy is fed to the optical waveguide so that the electron arrangement is... Agent: Brinks Hofer Gilson & Lione

20090279900 - Systems and methods for the mitigation of polarization mode dispersion impairments in fiber optic links: The present invention provides systems and methods for the mitigation of PMD impairments in fiber optic links. The present invention utilizes synchronous polarization modulation and digital control of polarization modulation, instead of independent polarization modulators and analog control used in the current state of art. Also, the present invention utilizes... Agent: Clements Bernard PLLC

20090279902 - Method and apparatus for demodulating and regenerating phase modulated optical signals: A DPSK/DQPSK receiver includes an optical splitter that separates the received DPSK/DQPSK optical signal according to an optical power splitting ratio into a plurality of received optical signals. A plurality of optical filters passes a plurality of filtered received optical signals. A plurality of optical detectors generates a plurality of... Agent: Rauschenbach Patent Law Group, LLC

20090279901 - Passive component for all-optical regeneration of high levels by saturable absorptions cavity: An optical component for processing an optical signal, operating by reflection in a saturable absorption resonant cavity formed between a first so-called rear mirror and a second mirror situated on the side of the incident signal, the reflectivity of the second mirror being greater than or equal to the reflectivity... Agent: Greer, Burns & Crain

20090279903 - Modulating retro-reflector optical communication using polarization differential signaling: A retroreflector coupled with a polarization rotator is provided according to some embodiments. The polarization rotator can be designed and/or configured to introduce a fraction of a wavelength phase difference in a received beam of light prior to reflecting the beam of light back toward the source of the light.... Agent: Townsend And Townsend And Crew, LLP

20090274455 - Apparatus and method for performing line analysis of continuous data signals: An apparatus for performing an optical line analysis of continuous data signals. The apparatus comprise a phase position processor for computing a phase early/late indicator; a phase control code processor for computing a difference phase indicator; a frequency extractor for computing a low frequency jitter indicator; and a statistical calculator... Agent: Myers Wolin, LLC

20090274456 - Evaluating the position of a disturbance: The present invention relates to a method of and apparatus for evaluating the position of a time-varying disturbance on an optical waveguide. The steps include: transmitting sensing signals onto the optical waveguide, which sensing signals have imposed thereon a modulation which is dependent, at least in part, on their time... Agent: Nixon & Vanderhye, PC

20090274457 - Channel monitor and method for estimating optical power: A method for estimating optical power in an optical channel includes determining a tunable filter full-width, FWF, by measuring a response of the tunable filter to a known signal and mapping the response to frequency. A portion of an optical channel is coupled to an input of the tunable optical... Agent: Rauschenbach Patent Law Group, LLC

20090274458 - Compact optical multiplexer and demultiplexer: Consistent with the present disclosure, an arrayed waveguide grating (AWG) is provided that includes first inputs and second inputs. Each of the first inputs receives a corresponding one of a plurality of first optical signals, each of which has a corresponding one of a plurality of wavelengths. Second inputs are... Agent: Infinera Corporation Ross Carothers

20090274459 - Optical node apparatus: The present invention is directed to an optical node apparatus in which the number of light elements that propagates reference light is reduced, which includes pa input-side wavelength mux/demux elements, a switch module, pb output-side wavelength mux/demux elements, and a reference light source. Each of the input-side wavelength mux/demux element... Agent: Staas & Halsey LLP

20090274460 - Differential delay receiver using cross-polarization interferometer for polmux-dpsk system: A differential delay detection system and method includes an optical splitter to split an incoming optical signal between a first path and a second path. The first path includes a cross-polarization interferometer configured to separately generate polarization independent outputs using split paths and to generate cross-polarization interference outputs, and a... Agent: Nec Laboratories America, Inc.

20090274461 - Pon multicast communication system, multicast management method, and corresponding devices: A Passive Optical Network (PON) multicast management method includes: an Optical Line Terminal (OLT) performs multicast control according to multicast control information, and generates a corresponding multicast downstream command; the OLT sends the multicast downstream command to an Optical Network Unit (ONU); and the ONU resolves the multicast downstream command,... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090274462 - Centralized lightwave wdm-pon employing intensity modulated dowstream and upstream: An optical system and method includes a source-free optical network unit coupled to an optical fiber for receiving a centralized lightwave carrier signal with downstream data over the optical fiber. The optical network unit includes a coupler configured to split the original carrier signal into a first path and a... Agent: Nec Laboratories America, Inc.

20090274463 - Upgrade resilient multi-transport optical network terminal: This disclosure is directed to devices and methods for facilitating the upgrade of optical networks. An optical network terminal (ONT) that terminates an optical fiber link of an optical network comprises two or more transport engines that each converts data transmitted via different transports to data corresponding to a service.... Agent: Shumaker & Sieffert, P. A.

20090274464 - Method, system and device for setting up wavelength connection: A method, a system, and a device for setting up a wavelength connection are disclosed herein. The method includes obtaining a wavelength path from a source network node to a destination network node and wavelength impairment compensation information of the wavelength path; and setting up the wavelength connection from the... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090274465 - High-speed underwater data transmission system and method: An underwater data transmission system including arrays of nano-meter scaled photon emitters and sensors on an outer surface of an underwater platform. For the emitters, a laser is pulsed to correlate with data packets, providing a beam of photons at a prescribed frequency. Nano-scaled collecting lenses channel the incoming photons... Agent: Naval Undersea Warfare Center Division Newport

20090274466 - Bi-directional signal interface: A bi-directional signal interface includes a first waveguide that propagates a first traveling wave. The first waveguide has one end that is coupled to a RF input port that receives a RF transmission signal and another end that is coupled to a RF bi-directional port that receives a RF reception... Agent: Rauschenbach Patent Law Group, LLC

20090274467 - Free-space photonic connection using wavelength division multiplexing and optical antenna: An interconnect system has an optical transmitter mounted on a first circuit board and an optical receiver mounted on a second circuit board. The optical receiver can be nominally aligned to receive an optical signal through free space from the optical transmitter. Further, the optical receiver includes one or more... Agent: Hewlett-packard Company Intellectual Property Administration

20090274468 - Transceiver module with releasing mechanism: A pluggable transceiver module assembly includes a cage (4) having a latch (41) formed thereon, and a pluggable transceiver module (1) for assembling to the cage. The pluggable transceiver module (1) includes a housing (10) having a latching portion (141) engageable with the latch, an actuator (31) and a pivot... Agent: Wei Te Chung Foxconn International, Inc.

20090274469 - Polarization multiplexed optical transmitting and receiving apparatus: In a polarization multiplexed optical transmitting and receiving apparatus, output light from a light source section of a transmission unit is separated in a polarization separating section, and then modulated in first and second modulation sections, and the modulated lights are synthesized in a polarization synthesizing section, and transmitted to... Agent: Staas & Halsey LLP

20090274470 - Optical code communication system: An optical code communication system comprises an optical transmitter, an optical receiver, and an optical transmission line. The optical receiver has an optical mixing decoder for mixing a coded light and a local light, dividing the mixed light into an object optical frequency and a non-object optical frequency, and outputting... Agent: Hogan & Hartson L.L.P.

20090274471 - Method and apparatus for controlling the optical output power from a burst mode laser: An optical network terminal is provided for use in a passive optical network (PON). The optical network terminal includes a data port for receiving data packets from an external device and a processor for converting the data packets to data link frames. In addition, the optical network terminal includes a... Agent: Motorola, Inc. Law Department

20090263122 - Method and apparatus for network diagnostics in a passive optical network: A method and apparatus are described for allowing diagnostics of a Passive Optical Network without significant loss of service to active customer sites. A plurality of primary transmitters operating at a first wavelength band are coupled to an optical switch of an optical network operating at a first wavelength band.... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090263123 - Fiber network monitoring: This specification describes technologies relating to optical fiber network monitoring. A monitoring system is provided. The monitoring system includes a fiber network including a plurality of branch fibers and a main station coupled to a main fiber of the fiber network to broadcast communications signals to a plurality of branch... Agent: Fish & Richardson P.C.

20090263124 - Methods of protection sharing for multi-protected optical demands in large-scale wdm mesh networks: A method and system for identifying and, optionally, managing protection resource sharing opportunities, such as within a large-scale wavelength-division multiplexing (WDM) mesh network.... Agent: Wall & Tong, LLP/ Alcatel-lucent Usa Inc.

20090263125 - Light mark, method and device for light mark modulation and demodulation: A light mark, a method and a device for light mark modulation and demodulation are disclosed. The modulation method includes: generating a mark with periodically alternating frequency and interval; and modulating the mark signal onto an optical signal. In the present disclosure, the mark with periodically alternating frequency and interval... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090263126 - Monitoring the physical layer of optoelectronic modules: Monitoring the physical layer of optoelectronic modules in a storage area network (SAN). In one example embodiment, a method for monitoring the physical layer of optoelectronic modules in a storage area network includes various acts. First, diagnostic data is gathered from a plurality of optoelectronic modules. Next, the diagnostic data... Agent: Workman Nydegger 1000 Eagle Gate Tower

20090263127 - Methods and devices for reducing power consumption in a passive optical network while maintaining service continuity: The present invention discloses methods for reducing power consumption in a PON while maintaining service continuity, the method including the steps of: providing an OLT operationally connected to at least one ONU; triggering a sleep request for at least one requesting ONU; upon receiving a sleep acknowledgement, activating a sleep... Agent: Dr. Mark M. Friedman C/o Bill Polkinghorn - Discovery Dispatch

20090263128 - Fiber optic multiplex modem: A fire alarm network fiber optic multiplex modem includes plural local interfaces, a fiber optic interface, a multiplexor, a fiber optic modem, and a demultiplexor. The multiplexor combines data received at the local interfaces into an outgoing data stream. The fiber optic modem transmits, at a first wavelength, the outgoing... Agent: Gerald M. Bluhm Tyco Safety Products

20090263129 - High-speed packet/ethernet devices, methods, systems and networks incorporating tunable pluggable optics for packet switching and routing functions, and incorporating gmps as the control plane: Devices, systems software, hardware, apparatus, networks, methods and combinations thereof for providing high speed, high capacity digital transmission over fiber-optic communications networks and systems are provided. The invention is particularly effective and useful in Ethernet systems and other communications networks. The photonic systems of the invention are adapted and arranged... Agent: Gary L. Shaffer

20090263130 - Gigabit passive optical network transmission convergence extension for next generation access: An apparatus comprising a data framer configured to frame a data stream into a plurality of frames each comprising a plurality of fields sized to align the frames with a word boundary greater than or equal to about four bytes long, and an optical transmitter coupled to the data framer... Agent: Conley Rose, P.C.

20090263131 - Method and system for transmitting ethernet data in an optical transport network: A method and a system for transmitting Ethernet data in an optical transport network (OTN), may include: filling justification byte or Ethernet service data bytes in at least two pairs of negative justification opportunity (NJO) bytes and positive justification opportunity (PJO) bytes in an overhead byte of an optical channel... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090263132 - Method of introducing an outstation into an optical network and outstation therefor: The present invention relates to the introduction of an outstation into an optical network. The optical network has a central station, and a plurality of previously introduced outstations which are optically connected to the central station. The network is operable in: a normal operating state in which data traffic is... Agent: Nixon & Vanderhye, PC

20090263133 - Optical communication network system, parent station optical communication device, and child station optical communication device: In a downstream channel communication, an individual downstream channel wavelength is allocated to each group of user nodes, and for user nodes in a same group, a central office performs a downstream-signal communication by a same communication method using the individual downstream channel wavelength. In an upstream channel communication, all... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090263134 - Dual-filter optical network interface unit and method of removing noise using same: A network interface unit includes an input for receiving downstream signals from an optical fiber, an optical pathway leading from the input, a laser connected to the optical pathway for transmitting upstream signals in a first wavelength band, and a receiver for receiving downstream signals in a second wavelength band... Agent: Commscope By Muncy, Geissler, Olds & Lowe, PLLC

20090263135 - Method and apparatus for transporting client signal in optical transport network: A method for transporting a client signal in an optical transport network (OTN) includes steps as follows. A byte number Cn of a client signal transported in a current OTN frame period is generated according to a client signal clock and a system clock. If the Cn of the current... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090263136 - Polarizaton diversity for optical fiber applications: At least two light beams with polarization diversity are generated that each carry a representation of the same information. Separate optic fibers carry each of the at least two beams through a region subject to vibration to a remote location where the information is recovered by an optical receiver based... Agent: Carmen Patti Law Group , LLC

20090263137 - Photonic rf down-converter based on optomechanical oscillation: An all optical radio frequency converter. The invention relates to a microtoroid optomechanical oscillator that can provide a local oscillation frequency and a mixing functionality. The microtoroid optomechanical oscillator can be fabricated from a silica-on-silicon wafer. When an input optical signal having an optical carrier frequency carrying a modulated RF... Agent: Milstein Intellectual Property Law LLC

20090263138 - Free-space optical communication system: A free-space communication system and method of operation includes a first communication device physically coupled to a substrate and having an optical transmitter for communicating information. A second communication device is physically coupled to the substrate and has an optical receiver for communicating information. An adjustable optical beam deflector is... Agent: Freescale Semiconductor, Inc. Law Department

20090263139 - Method and apparatus for increasing voice service for an optical network terminal (ont): An Optical Network Terminal (ONT) has a fixed number of voice ports. A system employing an example embodiment of the invention increases the number of voice ports without changing hardware in the ONT by employing an Analog Terminal Adaptor (ATA) expander and configuring the ATA expander through use of a... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20090263140 - Optical communication module and flexible printed circuit board: A flexible printed circuit board includes: a signal wiring pattern including: a transmission line for connecting an end of an optical device with an end of a signal generation circuit; and another transmission line for connecting another end of the optical device with another end of the signal generation circuit;... Agent: Mcdermott Will & Emery LLP

20090263141 - Dual use of test point power monitor: A channel alignment system in an optical communication network includes logic to sample power of a quadrature amplitude modulation (QAM) channel at a component downstream from a QAM modulator. The system determines if the sampled channel power has a sufficient level. The system signals power control logic of the QAM... Agent: Fsp LLC

20090263142 - Tunable optical filter: A tunable PLC optical filter having sequentially connected thermally tunable Mach-Zehnder (MZ) interferometers is described. The MZ interferometers, having free spectral ranges matching ITU frequency grid spacing, are tuned so as to have a common passband centered on the frequency of the signal being selected, while having at least one... Agent: Pequignot + Myers LLC

20090263143 - Optical communication integration: An integrated circuit die has a transistor circuitry section for implementing information handling operations. Optical circuitry is within the single semiconductor die. The optical circuitry includes a laser transmitter and is operably coupled to the transistor circuitry section. The transistor circuitry section originates information. The optical circuitry transmits the information... Agent: Freescale Semiconductor, Inc. Law Department

20090263144 - Linearized phase modulated analog optical links: A phase-modulated analog optical link that uses parallel interferometric demodulation to mitigate the dominant intermodulation distortion present in the link. A receiver for demodulating phase modulated optical signals includes a splitter dividing the phase modulated signal into parallel optical paths, each optical path having an asymmetrical interferometer, the time delays... Agent: Naval Research Laboratory Associate Counsel (patents)