Optical communications inventions 07/07

20070172235 - Compute clusters employing photonic interconnections for transmitting optical signals between compute cluster nodes: Various embodiments of the present invention are directed to photonic-interconnection-based compute clusters that provide high-speed, high-bandwidth interconnections between compute cluster nodes. In one embodiment of the present invention, the compute cluster includes a photonic interconnection having one or more optical transmission paths for transmitting independent frequency channels within an optical... Agent: Hewlett Packard Company

20070172236 - Optical switching device, optical access network, optical switching method, program, and recording medium: In an optical access network using an optical switching device, a 2×1 optical splitter in the uplink and downlink directions is eliminated to extend the transmission distance between the OLT and the ONU. An optical switching device includes a downlink optical switch element for switching a downlink optical signal sent... Agent: Young & Thompson

20070172237 - Methods and apparatus for optimizing utilization in reconfigurable optical add-drop multiplexer based ring network: Techniques are disclosed for generating a hitless migration plan to optimal state, given an optimal routing and wavelength assignment for demands. For example, a technique for use in performing a circuit transition in accordance with an optical ring-based network comprises obtaining a first (e.g., initial) circuit layout and a second... Agent: Ryan, Mason & Lewis, LLP

20070172238 - Optical transmission apparatus in ring transmission system: To provide a node (an optical transmission apparatus) enabling expanding the upper limit of the number of nodes capable of automatically forming a squelch table generated in advance in a BLSR system. For the above purpose, when generating a squelch table, hop counts counted from an add node or a... Agent: Katten Muchin Rosenman LLP

20070172239 - Optical transmission system: It is configured to have a first optical line terminal for transmitting a video signal of a first wavelength; a second optical line terminal for transmitting a downstream data signal of a second wavelength and receiving an upstream data signal of a third wavelength; and a wavelength division multiplexer for... Agent: Antonelli, Terry, Stout & Kraus, LLP

20070172240 - Optical add/drop multiplexer and optical network system: In an optical add/drop multiplexer dropping and inserting a light of a specific wavelength for a WDM signal light and an optical network system utilizing the same, a wavelength selective switch selects a part of WDM signal lights inputted as lights of drop wavelengths and outputting other lights, and a... Agent: Staas & Halsey LLP

20070172241 - Apparatus for transmitting signals between ultra wideband networks: An apparatus for transmitting signals between UWB networks is disclosed, which comprises: a signal converter for converting received optical signals from another UWB network into UWB signals, transmitting the converted optical signals within a UWB network, and converting UWB signals generated from within the UWB network into optical signals; and... Agent: Cha & Reiter, LLC

20070172242 - Optical signal regenerator and transmission system: A regenerator (7.x, 7.1-7.3) for regenerating optical signals on optical transmission links (4), in particular for use in a Dense Wavelength Division Multiplex (DWDM) optical transmission system. The regenerator (7.x, 7.1-7.3) comprises optical amplification means (7.xa, 7.xd) for compensating optical power losses, and a deterministic adaptation unit (7.xb) comprising means... Agent: Sughrue Mion, PLLC

20070166037 - System and method for managing network components in a hybrid passive optical network: In accordance with the teachings of the present invention, a system and method for managing network components in a passive optical network (PON) is provided. In a particular embodiment, the method includes transmitting, at a first wavelength, a first configuration message on the PON, wherein the first configuration message comprises... Agent: Baker Botts L.L.P.

20070166032 - Methods and systems for the performance analysis of fiber optic networks: In general, the present invention provides novel approaches to signal propagation modeling that utilize the following: 1) geographic segmentation is applied by separating a large fiber optic network into individual non-overlapping segments, defined by optical add/drop placements; 2) impairment segmentation is applied, such that optical noise, self-phase, cross-phase, four-wave mixing,... Agent: Clements Walker

20070166033 - Analyzing the quality of an optical waveform: Monitoring an optical signal includes receiving the optical signal. The optical signal is filtered to pass through a selected wavelength of the optical signal. The following is performed for each selected wavelength: receiving photons of the optical signal at a photo-reactive material operable to produce a reaction in response to... Agent: Baker Botts L.L.P.

20070166034 - Method of automatic adjustment of dither amplitude of mems mirror arrays: Methods for adjusting dither amplitude for MEMS mirrors in optical switches and optical switches employing such a method are disclosed. A dither amplitude of one or more MEMS mirrors may be adjusted in an optical switch having an input port, and an array of one or more MEMS mirrors that... Agent: Joshua D. Isenberg Jdi Patent

20070166035 - Optical transmission system: An optical transmission system capable of time difference correction without lengthening guard times, thereby improving optical packet transmission efficiency. A switching processor sets identical switching timing for all input ports thereof such that signals input from the input ports are switched at the same timing. When an optical dummy packet... Agent: Staas & Halsey LLP

20070166036 - Fiber and wire communication system: This invention provides a new architecture for a communication system between head-ends and end-users which expands bandwidth and reliability of the communication system. A mux-node receives communication signals from a head-end and forwards the received communication signals to one or more mini-fiber nodes. The connection to the head-end is via... Agent: At&t Corp. 2a-207

20070166038 - Wavelength-division multiplexed optical transmission system: A wavelength-division multiplexed optical transmission system to keep the correlation of data patterns among wavelength channels to a low level, assuring a stable transmitting quality. The wavelength-division multiplexed optical transmission system has any of a frame phase changing circuit for mutually differing transmitting frame phases between at least two or... Agent: Young & Thompson

20070166039 - Integrated optical transmitter: A wavelength division multiplex integrated optical transmitter and optical transmission system employing narrow band filters to dramatically improve tolerance to chromatic dispersion and thereby enable increased reach and/or data rates and a method of offering a communication service using such a transmitter or system.... Agent: Barnes & Thornburg LLP

20070166040 - Optical transmission system for transmitting signal of e-band with other bands: Disclosed is an optical transmission system capable of transmitting optical signals of E-band and other bands through one optical fiber. The system includes a first thin film filter for receiving optical signals of E-band and other bands at both sides thereof respectively, and multiplexing the optical signals of both E-band... Agent: Jones Day

20070166041 - Reprogrammable device address for a serial interface in an optic module: An optic module is disclosed having a shared bus interface, a transmit disable line, a memory and control logic or a processor configured to facilitate address modification via a bus shared by multiple optic modules. A single housing may contain multiple modules, all of which are preferably accessible via a... Agent: Weide & Miller - Mindspeed

20070166042 - Multiservice optical communication: A method is provided for the transmission of digital and radio frequency signals, for example for multiservice applications, over all types of multimode optical fibre link using laser diodes. The method comprises launching optical radiation into the core of the multimode optical fibre, in a manner that restricts the number... Agent: Goodwin Procter LLP Patent Administrator

20070166043 - Method and system for increasing downstream bandwidth in an optical network: A method is provided for increasing downstream bandwidth in an optical network that includes providing a downstream terminal comprising a digital output path and an analog output path. The method also includes receiving a signal comprising at least one wavelength at the downstream terminal. The method further includes selectively processing... Agent: Baker Botts L.L.P.

20070166044 - Optical quantizing unit and optical a/d converter: An optical quantizing unit includes an optical divider dividing 1st optical pulses to be quantized and sending the divided 1st optical pulses into a plurality of paths; a plurality of optical filters passing with different transmittances the divided 1st optical pulses; and an optical threshold filter sequentially receiving the 1st... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070166045 - Birefringent spectral filter with wide field of view and associated communications method and apparatus: A spectral filter is adapted for use in a receiver, for example in a short range submarine laser signal path, wherein the relative orientations of the receiver is such that the signal may appear diffusely or at an unknown point in a wide external field of view around an optical... Agent: Duane Morris, LLPIPDepartment

20070166046 - Method for optical transmission of a polarization division multiplexed signal: The polarsation-multiplexed signal contains two data signals that are orthogonally polarised in relation to one another. Their carrier signals are derived from the same source and thus have the same wavelength. The phase difference between the carrier signals, is adjusted or regulated in such a way that it corresponds to... Agent: Siemens Corporation Intellectual Property Department

20070166047 - Opto-electric phase-locked loop for recovering the clock signal in a digital optical transmission system: A phase-locked loop for a differential recovery of the clock signal wherein an extracted data signal (DS) is conveyed via a phase delay element and thence to a phase comparator. In the phase comparator comparison signals, whose phase shifts can be set relative to one another, differential phase evaluation is... Agent: Law Offices Of Karl Hormann

20070166048 - Use of beacons in a wdm communication system: A WDM communication system having two optical-frequency comb sources (OFCSs) that are substantially phase-locked to one another, with one of these OFCSs used at a transmitter to produce a WDM communication signal and the other OFCS used at a receiver to produce multiple local-oscillator signals suitable for homodyne detection of... Agent: Mendelsohn & Associates, P.C.

20070166049 - Laser vibrometer: This invention relates a laser vibrometer. A frequency modulated laser source (2, 3) generates a frequency modulated output, preferably a linear ramp, which is used for both the transmit beam and the local oscillator signal. Transmit (26) and receive optics (27) transmit the transmit beam towards a target and receive... Agent: Nixon & Vanderhye, PC

20070166050 - Optical communication module: An infrared communication module (A1) includes a sealing resin member (5) formed with an inclined surface (5b) positioned adjacent to a lens (5a) and inclined in both of the x direction in which an LED (2) and a photodiode (3) are arranged side by side and the y direction extending... Agent: Hamre, Schumann, Mueller & Larson, P.C.

20070166051 - Repeater, repeating method, repeating program, and network attack defending system: A repeater device receives from a first repeater device, which is adjacent to the repeater device on a network, a signature for controlling passage of a packet through the repeater device and determines whether to send the received signature to a second repeater device, which is adjacent to the repeater... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070166052 - Wavelength division multiplexing optical transmission equipment and method of amplifying optical wavelength division multiplexed signals: Optical signal transmission is improved by reducing the variance in light output level and OSNR by adjusting optical signal intensity and gain tilt, taking SRS influence into consideration.... Agent: Townsend And Townsend And Crew, LLP

20070166053 - Radio oscillating and radar systems: It is provided a practical radio oscillating system for a radar system to alleviate the necessity of a reception filter of severe specification of pass band and an oscillating system and an amplifier of high performance and high reliability. The radio oscillating system has an optical modulator 2 for oscillation;... Agent: Burr & Brown

20070166054 - Optical communication system and method for generating dark return-to-zero and dwdm optical mm-wave generation for rof downstream link using optical phase modulator and optical interleaver: A method of generating a dark-RZ pulse in an optical communications system with a dual-arm modulator by setting a direct current bias on the modulator to a specific value such that an output optical power from the modulator achieves a maximum value when the RF signals on the first and... Agent: Nec Laboratories America, Inc.

20070160371 - Optical receiver circuit applicable to multiple transmission rates: An optical receiver circuit is provided which is able to receive optical signals having a variable transmission rate, without loss of data. The optical receiver circuit according to the present invention has a light-receiving section for converting an optical signal with a variable transmission rate into an electric signal. A... Agent: Smith, Gambrell & Russell

20070160372 - Add-drop device and cross-connect device for wavelength multiplex signals: According to the invention, in add-drop devices of an optical cross-connect device for wavelength multiplex signals, tributary drop signals to be dropped are pre-selected in the drop branch by means of pre-selection elements. Only these signals are amplified, thus reducing the number and/or power of the optical amplifiers. The tributary... Agent: Siemens Corporation Intellectual Property Department

20070160373 - Distributed illumination and sensing system: A method and system of distributed illumination and sensing, the system including devices, each device including an emitter to emit at least one of light and sound, a sensor to receive an indirect emission, and a controller to determine the existence and/or relative location of at least one of the... Agent: Marger Johnson & Mccollom/parc

20070160374 - Optical transmitter and method for controlling optical transmitter: An optical transmitter includes a laser diode drive circuit for driving a laser diode in accordance with a laser diode current that superimposes a pilot signal on a “0” logic level and a “1” logic level of a transmission signal, the pilot signal having a low-frequency compared with the transmission... Agent: Katten Muchin Rosenman LLP

20070154218 - Optical discriminators and systems and methods: An optical multi-filter discriminator suitable for treating optical signals from an optical signal source, e.g., a direct modulated laser (“DML”), comprises a first optical filter, a second optical filter optically coupled to the first optical filter, an input port operative to receive optical signals from an optical signal source and... Agent: Banner & Witcoff, Ltd.

20070154211 - Apparatus and method for detecting error of transfer system: An apparatus for detecting error of a transfer system that is adapted for detecting an error of a transfer system transferring a substrate loaded upon fabricating of a flat panel display device in a real time is disclosed. In the apparatus, an emitter generates a light and radiates the light... Agent: Brinks Hofer Gilson & Lione

20070154212 - Method and apparatus for testing transmission lines normally propagating optical signals: Portable apparatus for measuring parameters of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if it continues to receive a second optical signal (S2) from the other... Agent: Adams Patent & Trademark Agency

20070154213 - Method and device for monitoring an optical transmission line, especially an optical transmission line to an end subscriber of a transmission network: The invention relates to a method for monitoring an optical transmission line, especially an optical transmission line to an end subscriber of a transmission network; in which digital optical signals are transmitted bidirectionally between a first and a second end point of the transmission line (1); in which at the... Agent: The Culbertson Group, P.C.

20070154214 - Apparatus and method for measuring coherence sampling quality-factor: An apparatus and method for measuring a coherence sampling quality-factor (Q-factor) are provided, which are used to monitor quality of an optical signal in an optical network in real time. The quality is evaluated by a Q-factor. A laser diode and a wavelength converter are used in the apparatus to... Agent: Harness, Dickey & Pierce, P.L.C

20070154215 - Method and apparatus for detecting optical reflections in an optical network: A method and apparatus for detecting optical reflections in an optical network to locate and assess a problem in the optical network without dispatching multiple technicians with different skill sets and equipment. Optical transport components are configured to transmit optical signals. Supervisory components are configured to supervise the optical transport... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20070154216 - Wavelength tracking apparatus and method in wdm-pon system: Provided are an apparatus and method for tracking a wavelength in a passive optical subscriber network in which a central base station and at least one subscriber terminal are connected via a remote node. The apparatus includes a first wavelength aligning unit multiplexing and aligning wavelengths of optical signals from... Agent: Ladas & Parry LLP

20070154217 - Extendable loop-back type passive optical network and scheduling method and apparatus for the same: Provided are extendable loop-back passive optical network (PON) and scheduling method and apparatus for the same. The loop-back type PON includes an OLT (optical line terminal) including a wavelength-tunable optical transmitter and a wavelength-locked optical receiver, and an RN (remote node) including an optical coupler/splitter, the optical coupler/splitter receiving optical... Agent: Ladas & Parry LLP

20070154219 - Interconnections and protection between optical communications networks: An optical communications system including a submarine optical communications system, a landing station associated with the submarine optical communications system, a terrestrial optical communications system, a point of presence associated with the terrestrial optical communications system, a first wavelength division multiplexed optical connection between the point of presence and the... Agent: Dickie, Mccamey & Chilcote, P.C. Intellectual Property Department

20070154220 - Wavelength division multiplexing methods and apparatus for constructing photonic beamforming networks: Methods and apparatus for constructing phased array antenna beamforming networks are provided, that allow to scan multiple beams and select appropriate sets of delay lines simultaneously. The beamforming networks disclosed herein generate less losses than conventional ones and in some cases, do not require active switching, making them completely passive.... Agent: Ladas & Parry

20070154221 - Frequency agile transmitter and receiver architecture for dwdm systems: A frequency-agile optical transceiver includes a shared local oscillator (LO), a coherent optical receiver and an optical transmitter. The LO operates to generate a respective LO optical signal having a predetermined LO wavelength. The coherent optical receiver is operatively coupled to the LO, and uses the LO signal to selectively... Agent: Ogilvy Renault LLP

20070154222 - Half duplex type optical connection structure and optical device suitable for the same: Disclosed is an optical connection structure of half-duplex transmission type and an optical device suitable for the same. The optical connection structure of half-duplex type comprises two or more signal transmitting/receiving units, which are interconnected through an optical waveguide, wherein each of the signal transmitting/receiving units comprises an optical device... Agent: Cha & Reiter, LLC

20070154223 - Synchronizing nodes in an optical communications system utilizing frequency division multiplexing: Attenuation caused by dispersion in an optical fiber communications system is compensated. A number of low-speed channels is to be transmitted across an optical fiber. Each low-speed channel is allocated a different frequency band for transmission. The attenuation caused by dispersion is estimated for each of the frequency bands. The... Agent: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.

20070154224 - Optical transmission module: In an optical transmission module having a communication module which is freely movable in a case, when a tensile force is generated on an optical cable after connection of an optical transmission module, optical coupling surface and an optical axis center follow each other and thus stable optical transmission can... Agent: Antonelli, Terry, Stout & Kraus, LLP

20070154226 - Optical burst mode receiver: An optical burst mode receiver comprises a photo-detector receiving an optical signal for conversion to a current signal, a transimpedance amplifier receiving and converting the current signal into first and second transmit signals, a limiting amplifier comprising first and second input terminals and an output terminal generating a data signal,... Agent: Birch Stewart Kolasch & Birch

20070154225 - Optical receiver with duo-binary encoder: An optoelectronic circuit has an optical to electrical converter, a duo-binary encoder with an input coupled to an output of the converter, and a duo-binary decoder having an input coupled to the output of the encoder. A decision circuit having an input coupled to an output of the decoder is... Agent: Blakely Sokoloff Taylor & Zafman