Optical communications inventions 11/08

20080292310 - Method, apparatus and system for optical channel group shared protection: A method, equipment and system for sharing protection of grouped optical channels, provides, taking the network node as the source node, the middle node and/or the host node and dividing the influenced optical wavelength channels into a source optical channel set, a host optical channel set and a middle node... Agent: Harness, Dickey & Pierce, P.L.C

20080292311 - Intelligent transmitter module: An intelligent transmitter module (“ITM”) includes a CDR circuit for equalizing and retiming an electrical data signal, a driver for generating a modulation signal and/or performing waveform shaping of the equalized and retimed signal, and an optical transmitter configured to emit an optical signal representative of the data signal. A... Agent: Workman Nydegger

20080292312 - Method and apparatus for determining optical path attenuation between passive optical network nodes: A method and apparatus of determining attenuation of an optical path between two optical networks may include using a communications traffic signal without interrupting service or requiring additional external test equipment. A transmit optical network node is configured to measure the transmit power of a transmitted optical signal. A receive... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20080292313 - Methods, systems, and computer-readable media for ranging a device in a point-to-multipoint network: Methods, systems, and computer-readable media provide for ranging a device in a point-to-multipoint network. According to embodiments, a method for ranging a device in a point-to-multipoint network is provided. According to the method, a device identifier representing a drop in the point-to-multipoint network where the device is installed is received.... Agent: Hope Baldauff Hartman, LLC

20080292314 - Optical link monitoring system and method for passive optical network: The present invention provides an optical link monitoring system for the passive optical network. The system includes a master monitoring device connected to an optical line terminal and a plurality of response devices respectively connected to a plurality of optical network units. Through time division multiplexing technology, the master monitoring... Agent: Birch Stewart Kolasch & Birch

20080292315 - Anti clipping circuit for laser transmitters: This anti clipping circuit is for a laser transmitter used to transmit sub-carrier multiplexed signals for CATV applications. The circuit design is based on actual clipping measurements showing the specific time and duration of the clipping events is random. The individual clipping pulses interval is fixed, every 4 us. A... Agent: Motorola, Inc. Law Department

20080292317 - Integrated multiplexer/demultiplexer having offset transmitters and receivers for use in an optical transceiver module: An apparatus for use in an optical transceiver module that incorporates an integrated multiplexer/demultiplexer for high speed data transfer applications. One example embodiment includes a transmissive block arranged to interface with a transmit optical port, a receive optical port, and a plurality of optical subassemblies. The transmit optical port may... Agent: Workman Nydegger

20080292316 - Method and apparatus for reducing crosstalk in a dwdm transmission system: A method and apparatus is provided for transmitting a WDM optical signal. The method begins by modulating a plurality of optical channels that are each located at a different wavelength from one another with a respective one of a plurality of information-bearing electrical signals The channel spacings between adjacent ones... Agent: Motorola, Inc. Law Department

20080292318 - Optical transmission device,optical transmission method, and recording medium thereof: An optical transmission device that is installed at a node of a network and that performs transmission of an optical signal transmits the optical signal to an optical transmission device at the next node without amplifying the optical signal. The optical transmission device generates an adjustment optical signal used by... Agent: Staas & Halsey LLP

20080292319 - Optical-electrical hybrid integrated circuit: An operating unit performs a prescribed operation and includes a standby-state-signal generating unit that generates a standby state signal for switching between a standby state and an operation state of the operating unit in a first part of the operating unit. An optical-signal transmitting unit converts an electric signal, which... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080292320 - Led light global positioning and routing communication system: An LED light and communication system includes at least one optical transceiver, the optical transceiver including a light support and a processor. The light support has a plurality of light emitting diodes and at least one photodetector attached thereto. The processor is in communication with the light emitting diodes and... Agent: Vidas, Arrett & Steinkraus, P.A.

20080292321 - Optical transmitter, optical network and method for compensation of polarization mode dispersion: An optical transmitter apparatus for use in an optical communications network has a polarization dithering unit, an optical transmitter unit, and a transmission fiber. The polarization dithering unit is connected in series between an output of the optical transmitter unit and the transmission fiber.... Agent: Coats & Bennett, PLLC

20080292322 - Optoelectronic devices with intelligent transmitter modules: An optoelectronic device can implement an intelligent transmitter module (“ITM”), rather than a conventional TOSA, for the transmission of optical data signals. The ITM can include an optical transmitter, a CDR and driver IC, and a microcontroller and/or linear amplifier. Space available in the optoelectronic device due to using an... Agent: Workman Nydegger

20080292323 - Systems and methods for reducing clipping in multichannel modulated optical systems: A system for reducing clipping may be used between a multichannel RF source and a laser to reduce or correct clipping that might occur in the laser as a result of negative spikes or peaks in a multichannel RF signal. The system generally includes a clipping correction circuit that receives... Agent: Applied Optoelectronics, Inc.

20080292324 - Systems and methods for reducing clipping in multichannel modulated optical systems: A system for reducing clipping may be used between a multichannel RF source and a laser to reduce or correct clipping that might occur in the laser as a result of negative spikes or peaks in a multichannel RF signal. The system generally includes a clipping correction circuit that receives... Agent: Applied Optoelectronics, Inc.

20080292325 - High immunity clock regeneration over optically isolated channel: An optically isolated circuit device includes a first opto-isolator circuit that is driven by a first clock signal, and the output of the first opto-isolator circuit is used to drive a phase-locked loop (PLL) that is configured to synthesize a second clock signal having a frequency that is a multiple... Agent: Kathy Manke Avago Technologies Limited

20080292326 - Optical voltage controlled oscillator for an optical phase locked loop: An optical phase locked loop (1), comprising an optical phase detector (2) receiving as inputs an optical signal to be locked (symbol I) and a locked optical signal (symbol II) and providing as its output an electrical error signal (VPD) indicating the phase shift existing between the optical signal to... Agent: Greenberg Traurig LLP (la)

20080285969 - Optical transmission method and device: In an optical transmission method and device of a point-multipoint type, whether or not identification information of an optical network unit designated is received within a fixed phase tolerance for a transmission enabling phase designated to optical network units on multipoint sides is determined. When it is determined that no... Agent: Staas & Halsey LLP

20080285970 - Optical signal quality monitoring circuit and optical signal quality monitoring method: The present invention provides an optical signal quality monitoring circuit and an optical signal quality monitoring method for measuring correct optical signal quality parameters when a signal bit rate is changed. The optical signal quality monitoring circuit which samples and converts an electrical signal converted from an optical signal with... Agent: Workman Nydegger

20080285971 - Switch for optical interconnection networks: The described subject matter concerns efficient routing of data in an optical network. An optical switching element utilizes a noise reduction circuit to eliminate glitches in the optical signal, and thereby enable highly scalable, cascadeable switching networks to be constructed. The current driver is directly bonded to the SOA to... Agent: Baker Botts L.L.P.

20080285972 - Packet communicating apparatus: Bandwidth control over users accommodated under ONU in PON is achieved. BAS sets user bandwidth information obtained during user authorization in OLT. The OLT achieves bandwidth control on a user basis, using bandwidth information set from the BAS. The present invention enables bandwidth control over users under the ONUs.... Agent: Stanley P. Fisher Reed Smith LLP

20080285973 - Optical add/drop multiplexer: There is provided a shutdown controller that monitors the temperature of an optical multiplexer and maximizes the loss of an optical attenuator when a temperature monitor result is abnormal. An optical level change detection circuit section is disposed with respect to an optical level monitor of individual monitors in an... Agent: Mcdermott Will & Emery LLP

20080285974 - Optical multiplexer/demultiplexer: An optical multiplexer/demultiplexer comprising a member, of which first and second opposite planar surfaces are parallel to each other. The member includes therein a void, of which third and fourth opposite planar surfaces are in parallel to each other. An extension of a first line lying on the first planar... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080285975 - Burst scheduling methods in optical burst switching system: Provided is a burst scheduling method in an Optical Burst Switching (OBS) system in which a plurality of nodes are connected through a mesh-type network. When a TDB which has used many network resources via a plurality of nodes and an SHG burst generated in a previous node, among bursts... Agent: Wells St. John P.s.

20080285976 - Optical signal demultiplexing device and optical signal demultiplexing method: An optical signal demultiplexing device includes a demultiplexing unit that receives an optical signal multiplexed by an optical time-division system and a synchronization pattern, and demultiplexes the optical signal based on the synchronization pattern. The optical signal demultiplexing device also includes a pulse-width increasing unit that makes optical signals demultiplexed... Agent: Staas & Halsey LLP

20080285977 - Method and apparatus for transmitting optical signals: The present invention addresses the problem of transmitting optical signals with high extinction ratios using low-power drive signals. At present, low-power optical transmitters typically operate with modulation extinction ratios of, at best, about 10 dB. Embodiments of the present invention may achieve extinction ratios exceeding 20 dB using low-power drive... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20080285978 - Optical hybrid module: Provided is an optical hybrid module in which an optical device, a filter, an amplifier and an antenna are hybrid-integrated, which includes: a silicon optical bench disposed on a substrate and having an optical fiber and an optical device; an amplifier disposed on the substrate and connected to the optical... Agent: Rabin & Berdo, PC

20080285979 - High-speed optical communication: A high-speed optical communication system for transmitting and receiving an optical signal is disclosed. A contents receiver transmits previously given unique identification information by using a light less intensive than the intensity level of a pre-given threshold. When a contents transmitter receives the identification information transmitted from the contents receiver,... Agent: Young & Thompson

20080285980 - Eye safety mechanism for use in optical cable with electrical interfaces: An eye safety mechanism for use with a bi-directional data cable having an electrical interface at least one (but potentially both) ends, despite the fact that the cable communicates over much of its length using a bi-directional optical channel. Upon power-up, the eye safety mechanism determines whether or not a... Agent: Workman Nydegger

20080285981 - Method and system for an asymmetric optical phy operation for ethernet a/v bridging and ethernet a/v bridging extensions: Optical signals may be communicated with A/V Bridging services between an upstream link partner and a down stream link partner, each comprising an asymmetric Ethernet optical physical layer (PHY). High bandwidth A/V optical signals may be transmitted from the upstream link partner and low bandwidth optical signals may be transmitted... Agent: Mcandrews Held & Malloy, Ltd

20080285982 - Single fiber duplex optical transport: The invention pertains to optical fiber transmission systems, and is particularly relevant to optical transport systems employing optical amplifiers. In particular the invention teaches an apparatus and method that allows cost effective co-directional operation of an optical amplifier to support full duplex traffic on a single fiber, and the design... Agent: Woodcock Washburn LLP

20080285983 - Modulation scheme for tedons: A system and method for increasing transmission distance and/or transmission data rates using tedons and an encoding scheme to reduce the number of ones in a data signal is described. For example, the method for increasing transmission distance and transmission data rate of a fiber optical communications link using tedons... Agent: Mr. S. H. Dworetsky At&t Corp.

20080285984 - Device and method for the homogenisation of optical communication signals: The invention provides a method and apparatus for providing a uniform output from an optical transmitter. The invention comprises at least one discrete light source (30), and a housing (38) defining an internally reflecting volume (42) for light from the at least one light source, the housing having a light... Agent: Ungaretti & Harris LLP Intellectual Property Group - Patents

20080279548 - Method and apparatus for processing fault dependency of different levels of tandem connection monitoring: A method for processing fault dependency of different levels of tandem connection monitoring is provided. The method comprises obtaining monitored coverage scopes of the different levels of tandem connection monitoring (TCM); locating a fault section according to an overlapping relationship between monitored coverage scopes of the at least two different... Agent: Brinks Hofer Gilson & Lione

20080279549 - Optical line terminal and optical network unit capable of alarm transmission scheme for passive optical network system: A station-side apparatus adapted for use in a passive optical network (PON) system is disclosed, which remotely collects inside information of optical network terminals (ONTs) even before completion of start-up of an optical network unit (ONU), permits an obstruction-detected ONU to send out an emergency notification message to the station-side... Agent: Mcdermott Will & Emery LLP

20080279550 - Method and system for measuring average q-factor in optical networks: A technique for determining averaged Q-factor, Qavg, for an optical binary signal transmitted at a bit rate X, based on amplitude histogram evaluation and on asynchronous sampling. The technique is inexpensive since it uses sampling pulses, which have bit rate Y lower than X and are not synchronized with the... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

20080279551 - Method and apparatus for transporting client signals over transport networks using virtual concatenation: The invention includes a method and apparatus for transporting a client signal over a transport network using enhanced virtual concatenation (VCAT) and enhanced link capacity adjustment scheme (LCAS) techniques. A method includes provisioning, for a client signal, a virtual concatenation group (VCG) signal having a VCG signal bandwidth, converting the... Agent: Docket Administrator Lucent Technologies Inc.

20080279552 - Methods of placing reconfigurable optical add/drop multiplexers (roadms) in a network: A distributed network including at least two Reconfigurable Optical Add/Drop Multiplexers (ROADMs) may be designed by a method including simulating routing of data traffic in a distributed network. The method may also include identifying a first location for placement of a first ROADM based at least partially on the simulated... Agent: Toler Law Group

20080279553 - Optical transport network hierarchy for full transparent transport of datacom and telecom signals: The present invention provides an Optical Transport Network (OTN) hierarchy that supports full transparency for both Ethernet and Telecom signals. The present invention defines new rates and mapping/multiplexing methods to adapt transparent 10 Gigabit Ethernet (10 GBE) (255/238 and 255/237) and 10 Gigabit Fibre Chanel (10 GFC) (255/237) to Optical... Agent: Clements Bernard Miller

20080279554 - Optical line terminal capable of active bandwidth allocation for passive optical network system: In a GPON system conforming to ITU-T Recommendations G.984.3, an optical line terminal is provided which has an active bandwidth allocation function that preferentially puts small bandwidth signals in a particular segment of a frame, e.g., at a head of the frame, to prevent fragmentations that may occur particularly when... Agent: Mcdermott Will & Emery LLP

20080279555 - Method to provide caller's location in ip phone system, optical transmission system, optical connector, and optical network unit: To inform a location of a caller to the other party in an IP phone system, a wireless IC tag preserving unique ID information is attached to an optical connector of a user connection port. The relations between locations of the optical connectors and ID information of corresponding wireless IC... Agent: Christie, Parker & Hale, LLP

20080279556 - Wavelength division multiplexed passive optical network: Data is transmitted between a central office and customer premises by a wavelength division multiplex passive optical network. Two laser beams with separate wavelengths are transmitted from the central office to an optical network unit in the customer premises. Both laser beams carry downstream data. One laser beam is intensity... Agent: Nec Laboratories America, Inc.

20080279557 - Wdm-pon system using self-injection locking, optical line terminal thereof, and data transmission method: Disclosed are a wavelength division multiplexing-passive optical network (WDM-PON) system using self-injection locking, an optical line terminal thereof, and a data transmission method. A wavelength division multiplexing-passive optical network (WDM-PON) system according to an aspect of the invention includes an optical line terminal. The optical line terminal includes a reflector... Agent: Townsend And Townsend And Crew, LLP

20080279559 - High frequency optical millimeter-wave generation and wavelength reuse: A method includes generating an optical millimeter wave signal for modulation of a first data signal, and deriving from the generated optical millimeter wave signal a subsequent light source for modulation of a second data signal. More specifically the generating includes modulating a light wave to a multiple of a... Agent: Nec Laboratories America, Inc.

20080279558 - Method & apparatus for clearing an optical channel: A method and apparatus for clearing an optical channel for transmitting data through free space between a first and second location includes a light beam, wherein the light beam has a spatially and/or time-dependent modulated intensity profile, and is substantially collimated so that the intensity profile is conserved over a... Agent: Macpherson Kwok Chen & Heid, LLP

20080279560 - Communication device, communication system, communication method, communication program, and communication circuit: A transmitter (1) which transmits a predetermined amount of transfer data using an infrared ray includes: a controller (13) for transmitting an SNRM command to the other station without transmitting a station-search command (XID) for searching the other station, the SNRM command including parameters such as maximum transferable speed and... Agent: Birch Stewart Kolasch & Birch

20080279561 - Transmitting system and transmitting device: Protocol conversion based on a communication protocol and data modulation based on a communication method are performed, in advance, on desired transmission data by a host device, which is an external device. Then, the converted data will be written to a memory in a transmitting device. According to a transmission... Agent: Birch Stewart Kolasch & Birch

20080279562 - Transmitter, receiver, communication system, communication method, communication program: A communication system includes a transmitter and a receiver that establish mutual connections of a plurality of their communication layers for communication. The transmitter has a request generating part for generating a connection request including data and commands required to connect the plurality of adjacent communication layers, and a request... Agent: Birch Stewart Kolasch & Birch

20080279563 - Apparatus and method for self-adaptive dispersion compensating: An apparatus for adaptive dispersion compensation and the method thereof applied to adaptive dispersion compensation in an optical communication system comprises: input optical fiber, an optical tunable dispersion compensator, output optical fiber, a signaling system unit, a control logic unit which is used to calculate the adjustment value of the... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20080279564 - Systems and methods of polarization time coding for optical communications: Systems and methods of polarization-time coding are disclosed. One method includes encoding information in orthogonal polarizations of light and correlated information in multiple time slots, and transmitting the information using the orthogonal polarizations in the time slots. Another method includes receiving a first input pair which specifies a first polarization... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20080279565 - Apparatus and method for selfadapting dispersion compensation: The present invention discloses an apparatus and method for adaptive dispersion compensation, the apparatus comprising: a coarse-grain tunable dispersion compensator, a receiver with electric adaptive dispersion compensator, and a control logic unit. In the method, firstly it is to perform optical dispersion compensation for the input optical signals; then to... Agent: Brooks Kushman P.C.

20080279566 - Methods and apparatuses for measuring jitter in a transceiver module: Methods and apparatuses are provided for performing jitter measurements in a transceiver module. Accordingly, there is no need to use expensive test equipment that must be inserted into and removed from the network in order to obtain these measurements. In addition, because the measurements can be obtained at any time... Agent: Kathy Manke Avago Technologies Limited

20080279567 - Asymmetric ethernet optical network system: An Ethernet-based optical network system includes a first optical transmitter that can receive a first electric signal and to produce a first optical signal, a first optical receiver that can convert the first optical signal to a second electric signal. The first electric signal, the first optical signal, and the... Agent: Xin Wen

20080273872 - Single-fiber protection in telecommunications networks: A solution for detecting and recovering from a failure in a protected single-fiber passive optical network. A detector is used to detect the degradation in power level of optical signals. Furthermore, the invention discloses a variable symmetric split ratio approach to improve the number of splits (e.g. the number of... Agent: Foley & Lardner LLP

20080273873 - Optical path feasibility in an optical communication network: A method of assessing the feasibility of a composite optical path in an optical communications network in which the composite path is composed of two optical paths k1 and k2 is described. The method comprising the steps of: defining, for each individual optical path k and with type i interface,... Agent: Coats & Bennett, PLLC

20080273874 - Method and apparatus for low chirp transmitter for optical fiber communications: A directly modulated optical transmitter for use with a fiber optical communications system operating in the 1550 nm wavelength band exhibits very low chirp. The chirp inherently present in a directly modulated laser is cancelled by a phase modulator which optically modulates the directly modulated laser light beam by applying... Agent: Morrison & Foerster LLP

20080273875 - Optical network system: An optical network system capable of directly routing optical signals without entailing multiple reception of identical wavelengths. A set wavelength output unit outputs a set wavelength. An Nk-axis filter receives an Nk-axis signal propagated through a ring of an Nk-axis direction and an Nk−1-axis signal split inside the local node,... Agent: Staas & Halsey LLP

20080273876 - Transient optical power suppressing apparatus, method, and network: An apparatus for suppressing optical power transients includes a variable optical attenuator receiving an input optical signal and outputting an output optical signal; an optical power sensing element coupled to the input optical signal and sensing a portion of the input optical signal; and a feedforward loop controller coupled to... Agent: Clements Bernard Miller

20080273877 - System and method for managing communication in a hybrid passive optical network: In accordance with the teachings of the present invention, a system and method for managing communication in a hybrid passive optical network (HPON) is provided. In a particular embodiment, the method includes transmitting, at a first wavelength, a first configuration message on the HPON. The method also includes receiving at... Agent: Baker Botts L.L.P.

20080273878 - Method, system and optical network terminal for mapping a service flow into a service transmission channel: A method for mapping a service flow to a service transmission channel includes: configuring determined configuration parameters for a message characteristic into an Optical Network Terminal (ONT); the ONT ensures that the received service flow matches the configured message characteristic; mapping the service flow to a specified service transmission channel.... Agent: Leydig, Voit & Mayer, Ltd (for Huawei Technologies Co., Ltd)

20080273879 - Optical transmission system and method for compensating wavelength dispersion of main signal by multiplexing dispersion-free control signal: At the transmit end of an optical transmission link, a main signal and a control signal are multiplexed into an optical multiplex signal and forwarded to the link. The frequency of the control signal is much lower than the frequency of the main signal so that the control signal is... Agent: Nec Corporation Of America

20080273880 - Redundant channel implementation to extend optical transceiver lifetime and relibility: Embodiments introduce redundant optical channels to significantly extend the lifetime of parallel optical transceivers. A plurality of transmitters, N, transmit on a plurality of optical channels, where N is an integer number of optical channels greater than 1. One or more redundant channels, M, are also provided. N+M multiple input... Agent: Intel/bstz Blakely Sokoloff Taylor & Zafman LLP

20080273881 - Burst light receiver, optical communication system, burst light reception control method and recording medium with program recorded therein: To enhance resistance against external factors such as junk data and noise in the burst signal by use of a simple configuration without separately requiring other dedicated circuits such as a mask signal generator, a burst light receiver includes an information restoring unit for receiving a signal from an optical... Agent: Nec Corporation Of America