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Optical communications January recently filed with US Patent Office 01/11

20110019994 - High bandwidth demodulator system and method: A method of analysing an input signal, the method including the steps of: (a) dividing a first input signal into first and second orthogonal signal polarisation components; (b) dividing a second input signal into orthogonal first and second orthogonal local polarisation components; (c) mixing the first orthogonal signal component with... Agent: Rauschenbach Patent Law Group, LLP

20110019995 - Optical transmission receiver and method for the same: There is provided an optical transmission receiver includes an optical switch configured to switch between optical transmission channels, the optical transmission channels being gradually switched from one to the other, an optical amplifier configured to amplify a light propagating in the other of the optical transmission channels which is in... Agent: Fujitsu Patent Center Fujitsu Management Services Of America, Inc.

20110019996 - Methods and apparatus for optical networks: A chromatic dispersion compensation system for an optical transmission system incorporates circuitry which determines the length of an optical fiber extending between an output amplifier and an input amplifier. Based on fiber type, the total chromatic dispersion on the fiber is determined. Compensation can then be automatically implemented.... Agent: Husch Blackwell Sanders, LLP Husch Blackwell Sanders LLP Welsh & Katz

20110019997 - System for intercepting signals to be transmitted over a fiber optic network and associated method: A system is provided for intercepting signals transmitted between a target served by a fiber optic network and a subscriber. A network is described having a phone switch at a central office configured to receive signals for transmission to and from a target, such as the target of a criminal... Agent: Verizon Patent Management Group

20110019998 - Small form factor pluggable (sfp) optical transceiver module and method: A small form factor pluggable (SFP) optical transceiver module and method for performing optical communications are provided. The SFP optical transceiver module has a housing to which a duplex receptacle is secured. The duplex receptacle has a C-shaped opening, the upper and lower portions of which are defined by upper... Agent: Kathy Manke Avago Technologies Limited

20110020000 - Communication apparatus at subscriber home: An MC-ONU is an ONU installed at a subscriber's home. The MC-ONU includes: a receiving unit which receives signals transmitted from an OLT at a telecommunications carrier site which has not established a link; a determining unit which determines the OLT, which has not established a link, to be a... Agent: Ladas & Parry

20110019999 - Location tracking using fiber optic array cables and related systems and methods: Fiber optic array cables and related systems and methods to determine and/or track locations of objects are disclosed. The fiber optic array cables can be employed in an optical-fiber-based communication system, including a centralized optical-fiber based communication system. In one embodiment, the fiber optic array cable is configured to carry... Agent: Corning Incorporated

20110020002 - Optical line terminal, method for operating optical reception interface, and method for processing continuous mode signal of optical line terminal: An Optical Line Terminal (OLT) configuring a Passive Optical Network (PON) is provided. The OLT includes an optical transmitter that transmits an optical signal to Optical Network Units (ONUs) in a downstream direction, an optical receiver that includes general Continuous Mode (CM) signal processing elements to recover clocks and data... Agent: Staas & Halsey LLP

20110020001 - Time division multiple access over wavelength division multiplexed passive optical network: Provided is a time division multiple access over wavelength division multiplexed passive optical network (TDM-over-WDM-PON) system. According to the TDM-over-WDM-PON system, a downstream optical signal is separated according to a wavelength in a remote node, transmitted to an optical amplifying device located in subscriber equipment, amplified in the optical amplifying... Agent: Ladas & Parry LLP

20110020004 - Data transmission method, data processing node, and data transmission system: A data transmission method, a data transmission system and a data processing node are provided to improve the resource utilization. The data transmission method includes the following steps: a second data processing node receives control information sent from a first data processing node through a preset control channel, where the... Agent: Staas & Halsey LLP

20110020003 - Generating a 400-gbit/s single-channel optical signal: A method for generating a 400 Gb/s single channel optical signal from multiple modulated subchannels includes carving respective modulated subchannels into return-to-zero RZ modulated subchannels having non-overlapping peaks with intensity modulators having a duty cycle less than 50%, and combining the subchannels into a single channel signal aggregating the bit... Agent: Nec Laboratories America, Inc.

20110020005 - Externally modulated laser optical transmission system with feed forward noise cancellation: An optical transmitter for generating a modulated optical signal for transmission over a fiber optic link to a remote receiver including a laser; a modulator for externally modulating the optical output signal with a RF signal to produce an optical signal including a modulated information-containing component; and a phase modulator... Agent: Emcore Corporation

20110020006 - Self configurable optical link: An optical link for communicating a payload data stream between a near end transceiver and a far end transceiver via an optical communication channel, the near end transceiver including a near end receiver (near-Rx) and a near end transmitter (near-Tx) and the far end transceiver including a far end receiver... Agent: Buchanan, Ingersoll & Rooney PC

20110020007 - Inter-transceiver module communication for optimization of link between transceivers: Two or more optical transceivers coupled to each other by an optical link to optimize communication over the optical link. A first transceiver generates electrical data that represents an operational parameter for optimization. The transceiver then converts the electrical data into an optical signal and transmits the optical signal over... Agent: Workman Nydegger 1000 Eagle Gate Tower

20110020008 - Photonic bandgap fibers: Included among the many structures described herein are photonic bandgap fibers designed to provide a desired dispersion spectrum. Additionally, designs for achieving wide transmission bands and lower transmission loss are also discussed. For example, in some fiber designs, smaller dimensions of high index material in the cladding and large core... Agent: Knobbe Martens Olson & Bear LLP

20110020009 - Two-phase optical communication methods and optical bus systems for implementing the same: Various embodiments of the present invention are directed to methods and systems for transmitting optical signals from a source to a plurality of receiving devices. In one method embodiment, an optical enablement signal is transmitted (401) from the source to the plurality of receiving devices. The target receiving device responds... Agent: Hewlett-packard Company Intellectual Property Administration

20110020010 - Spectral tilt compensation: A method of compensating for spectral tilt in an optical transmission system. The system comprises at least one span of optical waveguide for transmission of an optical signal and at least one optical amplifier for amplifying a power of the optical signal. The method comprises applying a predetermined spectral tilt... Agent: Nixon & Vanderhye, PC

20110020011 - Amplifier, optical receiver circuit, optical module and data exchange system: When a conventional optical receiver circuit is used, it is difficult to achieve noise reduction or provide a multichannel capability due to a considerable circuit area increase. Disclosed is an amplifier for optical communications that includes a CMOS inverter, which has a PMOS transistor and an NMOS transistor; an input... Agent: Crowell & Moring LLP Intellectual Property Group

20110020013 - Demodulation of an optical carrier: A method of transmitting a plurality n data streams comprises modulating an optical carrier using differential M-ary phase shift key (DMPSK) signaling in which M=2n. Advantageously the method comprises using differential quaternary phase shift keying in which n=2. A particular advantage of the method of the present invention is that... Agent: Nelson Mullins Riley & Scarborough LLP Floor 30, Suite 3000

20110020012 - Optical signal receiving apparatus: A simple synchronizing detection circuit is provided in each of logical operation circuits, and a method for making a synchronizing detection in parallel is adopted. A selector control section monitors the states of the simple synchronizing detection circuits in parallel, and supplies an output from a proper logical operation circuit... Agent: Mattingly & Malur, P.C.

20110013903 - Optical communication: A protected passive optical communications system (10), having a plurality of terminals (14), a main head end (22) for communicating with the terminals (14) in an operational state, and, a back up head (37) end arranged to allow communication with the terminals (14) in the event of a fault, the... Agent: Nixon & Vanderhye, PC

20110013904 - Passive optical network (pon) in-band optical time domain reflectometer (otdr): An in-band OTDR uses a network's communication protocols to perform OTDR testing on a link. Because the OTDR signal (probe pulse) is handled like a data signal, the time required for OTDR testing is typically about the same as the time required for other global network events, and is not... Agent: Dr. Mark M. Friedman C/o Bill Polkinghorn - Discovery Dispatch

20110013905 - Active optical cable apparatus and method for detecting optical fiber breakage: Embodiments of the invention include an active optical cable and method for controlling the operation of the active optical cable based on the detection of signal loss, e.g., due to fiber breakage, within the active optical cable. The active optical cable includes first and second optical transceivers, each with an... Agent: Kathy Manke Avago Technologies Limited

20110013906 - Quantum information system: According to one embodiment, a quantum information system includes a source of time dependent entangled photons and an indicating unit. The indicating unit indicates the entangled state of the entangled photons based on the emission time of one or more of the entangled photons.... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20110013907 - Multi-value optical transmitter: Provided is a multi-value optical transmitter in which a DC bias may be controlled to be stabilized so as to obtain stable optical transmission signal quality in multi-value modulation using a dual-electrode MZ modulator. The multi-value optical transmitter includes: D/A converters for performing D/A conversion on first and second modulation... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20110013908 - Adaptive hybrid optical control plane determination of lightpaths in a dwdm network: Techniques and a control architecture (apparatus and logic) are provided for an adaptive hybrid DWDM-aware computation scheme. The architecture is one that is a hybrid of a centralized control scheme and a distributed control scheme that performs adaptive physical impairment computations for an optical network. A central control server is... Agent: Edell, Shapiro, & Finnan, LLC

20110013909 - Optical code division multiplexing access system: Means for Solving The above problem is solved by an optical code division multiple access, OCDMA, system 5 which have a central office 2 comprising a multi-port optical encoder 1, a decode part 4 comprising a decoder 3 for decoding optical code signals from the multi-port optical encoder 1. The... Agent: Lawrence Y.d. Ho & Associates Pte Ltd

20110013911 - High-speed optical transponder systems: The present disclosure provides high-speed wavelength division multiplexing (WDM) transponders (e.g., 10 Gb/s, 40 Gb/s, 100 Gb/s, and beyond) that receive one or more optical signals and convert and/or remodulate the received optical signals onto a newly generated optical channel along with overhead processing/addition, forward error correction, and the like.... Agent: Clements Bernard PLLC

20110013910 - Wavelength real time display on the equipment for wdm optical networking systems with wavelength tunable capability: A wavelength tunable device for use in a wavelength division multiplexing (WDM) system comprising a display device for displaying at least one operating wavelength of the wavelength tunable device. The display device is electrically coupled to a control unit in the wavelength tunable device so as to display the tuned... Agent: At & T Legal Department - Ws Attn: Patent Docketing

20110013912 - Header assembly for communications module: In one example, a header assembly for use in a communication device has a base that includes a plurality of single ports through which a corresponding plurality of leads extends. The leads are retained in their respective single ports by a retainer material. Additionally, the base includes one or more... Agent: Workman Nydegger 1000 Eagle Gate Tower

20110013913 - Image-rotation prisms and optical interconnects employing the same: Embodiments of the present invention relate to a family of image-rotation prisms. Each image-rotation prism has the property that as an image-rotation prism is rotated, an image passing through the image-rotation prism rotates at twice the angular rate of the image-rotation prism. Embodiments of the present invention include optical systems... Agent: Hewlett-packard Company Intellectual Property Administration

20110013914 - Method and apparatus for improving reception of optical signals: A method and apparatus for receiving digital information transmitted via an optical signal over an optical channel wherein the optical signal includes an optical carrier (402) and at least one information-bearing optical sideband (404) in the optical frequency domain. The transmitted optical power is distributed between the optical carrier (402)... Agent: Woodcock Washburn LLP

20110008039 - Forward error correction (fec) enabled photonic integrated circuit (pic) chips with multiple signal channels: A forward error correction (FEC) communication device that includes a transmitter photonic integrated circuit (TxPIC) or a receiver photonic integrated circuit (RxPIC) and a FEC device for FEC coding at least one channel with a first error rate and at least one additional channel with a second error rate, wherein... Agent: Infinera Corporation Ross Carothers

20110008040 - Method to diagnose an optical communication network: A method for diagnosing an optical communication network having a control system, an optical hub, and multiple optical network terminators. The hub communicates with all the network terminators via an inband management channel. In case one network terminator disturbs the communication from the network terminators to the hub and the... Agent: Lerner Greenberg Stemer LLP

20110008041 - Optical cross-connect apparatus: The present invention relates to an optical cross-connect apparatus supporting plural directions, and provides a method of effectively performing an alarm indication by a node supervisory unit of the optical cross-connect apparatus. The node supervisory unit includes an alarm indication information storage unit that manages a management table for each... Agent: Mattingly & Malur, P.C.

20110008042 - Cell phone/internet communication system for rf isolated areas: A communication system for providing downlink and uplink communication between Service Providers, and users located in RF remotely located isolated areas, includes the sequential series connection of Service Provider signal sectors to Radio Interface Modules (RIM's), Service Combiner Units (SCU's), Fiber Transceiver Units (FTU's), Optical Multiplexer Units (OMU's), and Remote... Agent: Kenneth Watov, Esq. Watov & Kipnes, P.C.

20110008043 - Optical access network, remote unit, optical communication method, and optical communication program: The present invention is to provide an optical access network in which a remote unit receives an optical burst signal. A central unit (OLT) transmits a DC-balanced optical continuous signal including packets having identification information for identifying each remote unit (ONU) to an optical switching module (OSM). The optical switching... Agent: Mr. Jackson Chen

20110008044 - Optical-network design apparatus: An apparatus for designing an optical network having nodes, includes: a parameter holding unit which holds values of one or more optical-transmission parameters corresponding to one or more components constituting the optical network; a part generation unit which generates design candidates for a part to be arranged in each of... Agent: Staas & Halsey LLP

20110008045 - Detecting collisions on multipoint shared optical media: A system, and methods for detecting collisions on multipoint shared optical media, comprising an optical receiver, clock phase detector, clock recovery circuit, and a Passive Optical Network (PON) that transmits optical signals wherein the PON, the clock recovery circuit, and the clock phase detector are communicably coupled to the optical... Agent: Rg And Associates

20110008046 - Subscriber terminal of adjusting intensity of optical signal by controlling attenuation, and a method therefor: A subscriber terminal connected to a central-office unit in an optical communication network includes a variable optical attenuator for attenuating an optical signal received from the central-office unit; an optical-electric converter for converting the optical signal received via the attenuator to a corresponding electric signal; a clock extractor for extracting... Agent: Rabin & Berdo, PC

20110008047 - Device and a method for managing the transmission power of an optical source according to the level of optical losses of an optical link: A device and method are provided for transmitting an optical signal including at least two optical components to be transmitted respectively through at least two optical links that can be established respectively between the transmission device and at least two terminal devices. The transmission device and method associate, based on... Agent: Westman Champlin & Kelly, P.A.

20110008050 - Demultiplexing and multiplexing method and apparatus: A method of demultiplexing client data from a constant bit rate (CBR) optical client serial link into lower bit-rate CBR signals for transmitting over a plurality of wavelength division multiplexed (WDM) optical channels. The method comprises mapping blocks of bytes from a client frame received from the optical client serial... Agent: Potomac Patent Group PLLC

20110008051 - Optical communication apparatus and optical wavelength multiplexing transmission system: In case of a disconnection failure of an optical transmission line, a Raman amplifier generates a loss of main and supervisory signal alarms, an optical amplifier generates a loss of main signal alarm, and a supervisory signal transmission and reception unit detects the loss of supervisory signal. On the other... Agent: Mr. Jackson Chen

20110008048 - Optical system using optical signal and solid state drive module using the optical signal: An optical system and an SSD module that maintain optimal SI, PI and EMI characteristics without a shield based on a ground voltage and an impedance match. The optical system includes a solid state drive (SSD) module and an input/output (I/O) interface. The SSD module includes a plurality of solid... Agent: Harness, Dickey & Pierce, P.L.C

20110008052 - Port wavelength restriction encoding in wavelength switched optical network: An apparatus comprising a path computation element (PCE) coupled to a path computation client (PCC) and configured to perform a path computation using port wavelength restriction information for a network element (NE), wherein the port wavelength restriction information is encoded and received in a port wavelength restriction Type-Length-Value (TLV) that... Agent: Futurewei Technologies, Inc. C/o Conley Rose, P.C.

20110008049 - Transmission apparatus, transmission controlling method, and optical supervisory channel (osc) processing apparatus: An integrated transmission apparatus includes a plurality of optical supervisory channel (OSC) processing units for processing OSC signals contained in a wavelength division multiplexing (WDM) signal received from a WDM network and a switching unit for performing the path control of synchronous digital hierarchy (SDH) frames. An OSC processing unit... Agent: Ladas & Parry

20110008053 - Quantifying link quality in an optoelectronic module: In one example embodiment, an optoelectronic module includes an optical receiver and a post-amplifier. The optical receiver is configured to receive an optical signal and generate an electrical data signal corresponding to the optical signal. The post-amplifier is electrically connected to the optical receiver and is configured to amplify the... Agent: Workman Nydegger 1000 Eagle Gate Tower

20110008054 - Modulator and demodulator for a differential optical modulation format with eight phase changes: The invention relates to a system comprising an optoelectronic modulator device and demodulator device for establishing communication between optical communication systems by means of differential modulation with eight phase changes. Said system can increase the information transmission capacity by up to three times that of a system with two phase... Agent: Baker & Mckenzie LLP

20110008055 - Combined burst mode level and clock recovery: An apparatus comprising an optical receiver configured to receive an optical signal, and a combined level and clock recovery circuit coupled to the optical receiver and configured to update a signal threshold and a clock phase substantially simultaneously. Also included is an apparatus comprising at least one processor configured to... Agent: Futurewei Technologies, Inc. C/o Conley Rose, P.C.

20110008056 - Connection device and optical device: A connection device includes a ground electrode layer that is provided in a substrate, a first transmission path that is provided on the ground electrode layer via a dielectric layer, and a plurality of leads that are connected to the first transmission path and the ground electrode layer or the... Agent: Staas & Halsey LLP

20110008058 - Optical communications system: The present invention relates to an optical communications system equipped with a structure, capable of applying a PBGF as an optical transmission line, by which high capacity information transmission is enabled by use of the PBGF. The optical communications system (1) is provided with an optical transmitter (10), an optical... Agent: Mcdermott Will & Emery LLP

20110008057 - Rate adjustable differential phase shift key (dpsk) modulation: In a fixed delay optical communication system, rate adjustable differential phase shift key (DPSK) techniques eliminate the need for multiple comparing modules, each corresponding to a different data rate. Setting alternative data rates at integer multiples of the fundamental data rate of the optical communication system allows the system to... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20110008059 - Digital equalization apparatus and method for coherent optical receiver: Disclosed are a digital equalization apparatus for a coherent optical receiver and a digital equalization method for a coherent optical receiver, capable of compensating for chromatic dispersion and polarization impairment through a digital signal processing, and capable of performing a clock recovery and a data recovery through a digital symbol... Agent: Ladas & Parry LLP

20110008060 - Method and system for optoelectronic receivers for uncoded data: A method and system for optoelectronic receivers for uncoded data are disclosed and may include amplifying received electrical signals in a signal amplifier comprising differential gain stages with signal detectors coupled to the outputs. First and second output voltages may be tracked and held utilizing the signal detectors. A difference... Agent: Mcandrews Held & Malloy, Ltd

20110008061 - Synchronous circuit for use in optical homodyne receiver for generating local oscillation light with accurate demodulation: In a synchronous circuit, a synchronizing signal generator combines either an optical BPSK signal or local oscillation light with a phase-shifted signal to produce different optical signals, one of which for use in producing a signal demodulated from the BPSK signal is square-law detected, and calculates the optical signal detected... Agent: Rabin & Berdo, PC

20110008062 - Method and apparatus for communication in an illumination system using a liquid lens: A method and apparatus for communicating information content by modulation of light in an illumination system via a liquid lens optically coupled to the illumination system and capable of modulation of light thereof, using resonant modes of the liquid lens. A modulation control system operatively coupled to the liquid lens... Agent: Philips Intellectual Property & Standards

20110002687 - Systems and methods of optical path protection for distributed antenna systems: Systems and methods for optical path protection for distributed antenna systems are provided. In one embodiment, a method is provided. The method comprises receiving an electrical uplink radio frequency signal; generating an uplink optical signal derived from the electrical uplink radio frequency signal; splitting the uplink optical signal for transmission... Agent: Fogg & Powers LLC

20110002688 - system and method for implementing an automatic discovery function in a dwdm network: A system and method for implementing an automatic discovery function in a DWDM network are provided, wherein the system includes: an optical supervisory channel (OSC) being a bi-directional physical channel, configured to transmit information through multiplexing/de-multiplexing a wavelength independent of a master optical channel with the master optical channel; a... Agent: Clark & Elbing LLP

20110002689 - Optical ofdm receiver, optical transmission system, subcarrier separation circuit, and subcarrier separation method: A high-performance optical OFDM receiver is realized. A subcarrier separation circuit receives an optical OFDM signal consisting of two subcarriers A and B and separates a subcarrier component, signal light and first local oscillator light are input to the subcarrier separation circuit, the subcarrier separation circuit converts the signal light... Agent: Harness, Dickey & Pierce, P.L.C

20110002690 - Pon onu configured in the form of a gigabit interface converter (gbic): A Passive Optical Network (PON) component, such as a Gigabit Interface Converter (GBIC) or similar pluggable transceiver, provides the combined functionality of the GBIC (or similar device) and an Optical Network Unit (ONU). The result is a device with a reduced form factor by eliminating redundant components and simplified fault... Agent: At & T Legal Department - Canavan

20110002691 - Optical pulse compressing based on chirped fiber bragg gratings for pulse amplification and fiber lasers: Techniques and devices for using a chirped fiber Bragg grating to compress amplified laser pulses.... Agent: Perkins Coie LLP

20110002692 - Optical waveguide and bi-directional optical transceiver: An optical waveguide and a bi-directional transceiver are provided. A single mode optical fiber has one end coupled to one end of a hollow optical fiber and an opposite end having a slope plane, thereby separating optical signals travelling in opposite directions from each other. Manual alignment for an optical... Agent: Staas & Halsey LLP

20110002693 - Digital signal processing optical transmission apparatus: In a digital signal processing optical transmission apparatus such as a predistortion or OFDM type one, optical transmission at a stable S/N ratio is intended to be able to be made by controlling an output of an optical transmission signal with fixed average power, even if a peak to average... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20110002694 - Optical data transmission apparatus: An optical data transmission apparatus is provided, in which a first communication unit 101 and a second communication unit 102 arranged to freely move relatively to each other each include an optical signal transmission unit having a laser diode 120 for emitting single-mode light, a multi-mode optical fiber 111 for... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20110002695 - Apparatus and method for transmitting and receiving data using visible light communication: Provided is an apparatus and method for transmitting and receiving data in a visible light communication system, the apparatus including a visible light communication (VLC) transceiver for converting a visible light signal received from a counterpart into an electrical signal and outputting the electrical signal, by using a light receiving... Agent: The Farrell Law Firm, LLP

20110002696 - All-optical methods and systems: An all-optical modulation format converter for converting optical data signals modulated in an on-off-keying (OOK) format to a phase-shift-keying (PSK) format. The OOK-to-PSK converter can be coupled to a delay-line interferometer to provide an all-optical wavelength converter for differential PSK (DPSK). The OOK-to-PSK converter can also be used in all-optical... Agent: Brosemer, Kolefas & Associates, LLC (alu)

20110002697 - Method and apparatus for optical signal power discrimination: The present invention provides an optical power level discriminating device and method for discriminating optical power levels. The optical discriminating device includes a splitter for receiving an optical signal having first and second signal states, and splitting the received optical signal into a first and a second branch optical signal.... Agent: Scully, Scott, Murphy & Presser, P.C.

20110002698 - High speed optical transmitter with directly modulated laser source: An optical signal transmitter of direct modulation, a method for transmitting optical signals, and an optical network are provided. The optical signal transmitter includes a laser diode operating at a bias current above a lasing threshold of the laser diode; a modulating device applies a modulation signal to the diode... Agent: Scully, Scott, Murphy & Presser, P.C.