Optical communications inventions 09/09

20090238556 - Optical signal division transmission system, optical transmitter, optical receiver, and optical signal division transmission method: An optical signal division transmission system in which an input optical signal is divided into N parts (termed as “N-part optical signals”) and transmitted at a transmission rate of 1/N, wherein an additional optical wave path is provided separately from an optical wave paths for transmitting said N-part optical signals,... Agent: Nec Corporation Of America

20090238557 - Self-calibrating integrated photonic circuit and method of control thereof: A self-calibrating integrated photonic circuit and a method of controlling the same. In one embodiment, the circuit includes: (1) a substrate, (2) a laser located on the substrate and configured to produce source light at an output frequency, (3) a laser alignment sensor located on the substrate and including: (3a)... Agent: Hitt Gaines, PC Alcatel-lucent

20090238558 - Station terminal device, communication system, subscriber device management method, and recording medium recording program for station terminal device: In a conventional art, ONUs in services are significantly affected even when just one ONU is activated, and thus a communication bandwidth fails to be effectively utilized. To address this, an OLT includes a first distance information storing unit that stores information on the distance to an ONU in association... Agent: Nec Corporation Of America

20090238559 - Monitoring method for a passive optical network: The invention relates to a method for monitoring a passive optical network (1), PON, having a tree-like structure with a main line (3) and a plurality of branches (6.1 to 6.3), the method comprising the steps of: transmitting a wake-up signal (11) from an optical line termination (4), OLT, arranged... Agent: Harness, Dickey & Pierce, P.L.C

20090238561 - Method and apparatus for measuring quality of traffic performance in a passive optical network (pon): Systems and methods for measuring and reporting the performance of communications traffic in a Passive Optical Network (PON) are disclosed. According to the disclosed embodiments, the PON network may include an Optical Line Terminal (OLT) and multiple Optical Network Terminals (ONTs) downstream of the OLT. By aggregating multicast communications traffic... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20090238562 - Optical transmission apparatus, subscriber apparatus and optical communication system: An optical transmission apparatus communicable with a plurality of subscriber including a delay measuring part for detecting a response delay time from each subscriber based on reception timing of the delay measurement response optical packet, a detection part for detecting a received optical level of the delay measurement response optical... Agent: Staas & Halsey LLP

20090238560 - Systems and methods for determining an ac/dc cross-calibration coefficient: A first signal shaper generates a first signal having a first asymmetry. A second signal shaper generates a second signal having a second asymmetry different from the first asymmetry. The first and second signals have approximately the same peak-to-peak amplitude. An AC measurement element acquires a first scaled representation of... Agent: Kathy Manke Avago Technologies Limited

20090238563 - Optical signal transmission apparatus: There is provided an optical signal transmission apparatus having a stable dispersion compensation function without unnecessarily controlling a compensation value even when a main signal quality is deteriorated due to a factor other than dispersion or in the case of a transmission failure. When it is determined that a signal... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090238564 - Protection device for removing signal interference in a passive optical network: The invention relates to a protection device for removing signal interference in a passive optical network, in which a central optical cable (1) is split into several branch lines (3) at a branching point (2), comprising: a plurality of first pickups (A1, A2, . . . , A4) and/or a... Agent: Lerner Greenberg Stemer LLP

20090238565 - Optical switch with power equalization: An optical intensity control system for use with an optical switch providing individual signal paths between input and output ports. The system has a optical splitters connectable to output multiplexers of the switch and also has variable optical intensity controllers (VOICs) for insertion into the individual signal paths. The VOICs... Agent: Withrow & Terranova, P.l.l.c.

20090238567 - Electrical ring distribution interface for an optical transceiver: A ring connection system and method are provided for distributing signals in an optical-to-electrical interface. The method electrically connects a plurality of nodes in a series-connected ring, and receives an optical signal at a first node from a service provider. The method converts the optical signal to an electrical signal,... Agent: Gerald W. Maliszewski

20090238566 - Radio-access method, related radio base station, mobile-radio network and computer-program product using an assignment scheme for antennas' sectors: A radio base station for a mobile radio network, includes a set of remote units connected with the radio base station, preferably via a radio over fibre arrangement. Each remote unit provides radio cell coverage by means of a set of communication channels, and is equipped with a respective set... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090238568 - Optical shaping for amplification in a semiconductor optical amplifier: The present invention provides a system, apparatus, and method for efficient optical amplification and transmission of a data-encoded optical signal within a networking device, such as a transmitter or receiver. In various embodiments of the invention, an optical duobinary signal or hybrid duobinary signal is generated and shaped in preparation... Agent: Infinera Corporation

20090238569 - Optical transmission apparatus and optical communication system: An optical transmission apparatus is provided with an optical filter on a transmission line between a reception end of a transmission line and an OSC receiver. The optical filter has transmission characteristics such as to pass main signal light and optical supervisory channel light (OSC light), and to cut off... Agent: Fujitsu Patent Center C/o Cpa Global

20090238570 - Topologically multiplexed optical data communication: Systems and methods for encoding information in the topology of superpositions of helical modes of light, and retrieving information from each of the superposed modes individually or in parallel. These methods can be applied to beams of light that already carry information through other channels, such as amplitude modulation or... Agent: Foley & Lardner LLP

20090238571 - Optical transmission system and method for chromatic dispersion compensation: An optical transmission system including an optical transmission path for transmitting WDM signals multiplexed different wavelength optical signals, the WDM signals including different bit rate optical signals or different modulation format optical signals; a repeater arranged in the optical transmission path, the repeater including a chromatic dispersion compensation unit for... Agent: Staas & Halsey LLP

20090238572 - Remote control device and remote control system: A remote control device controls a medical device or a medical control device for controlling the medical device by infrared light communication, and includes: an infrared light emission unit for emitting infrared light for performing infrared light communication; a control unit for allowing the infrared light emission unit to emit... Agent: Ostrolenk Faber Gerb & Soffen

20090238573 - Communication system and method with gain control for signals from distributed antennas: An apparatus for gain control in a communication system is disclosed. The apparatus includes means for receiving at least one aggregate communications signal, the at least one aggregate communications signal comprising a summation of distributed communications signals, means for detecting at least a sample of a signal level of the... Agent: Fogg & Powers LLC

20090238574 - Apparatus and method for monitoring optical gate device, and optical switch system: An optical gate device transmits or interrupts input light according to control information. The optical gate device includes a light-receiver that obtains input and output optical powers of the optical gate device, and a monitor that obtains optical input and output characteristics of the optical gate device based on the... Agent: Staas & Halsey LLP

20090238575 - Ultra high-speed adaptive and all-optical method for data packet rate multiplication compatible with multiple data rates: The present invention relates to an adaptive and all-optical method for data packet rate multiplication compatible with multiple data rates and/or multiple communication protocols. By performing a real-time pulse width compression on an original electronic or optical packet from an end user or a network interface device, the method generates... Agent: Wong, Cabello, Lutsch, Rutherford & Brucculeri, L.L.P.

20090238576 - Changing hardware settings based on data preamble: The present invention provides a new and unique method and apparatus for a new data speed switching scheme for a wired data interface. The method features receiving high-speed serial data over a physical link using a first coding scheme in a receiver; receiving a transmission mode change signal transmitted with... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20090238577 - Optical module and data communication system including the optical module: An optical module includes a fiber array, a laser diode array, a photodiode array and a micro-lens array. The fiber array includes optical fibers which are divided to a transmitter group and a receiver group. The laser diode array includes laser diodes which are grouped in a transmitter group. The... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090238578 - apparatus and method of compensating for compact digital domain chromatic dispersion: A method and apparatus of compensating for compact digital domain chromatic dispersion. The distortion of an optical signal due to chromatic dispersion is compensated by a digital signal processing in the electrical domain, either prior to the optical transmitter or following the receiver. The circular coefficient approximation and sub-band processing... Agent: Michael L. Diaz Diaz And Associates

20090238579 - Polarization demultiplexing optical receiver using polarization oversampling and electronic polarization tracking: An optical receiver utilizes differential quadrature phase-shift keying (DQPSK) demodulation and electrical crosstalk rejection to relax requirements on filter misalignment with a carrier signal and to enable electronic polarization demultiplexing of optical signals. The optical receiver uses additional polarization state information when performing differential phase measurements on the optical signals.... Agent: Infinera Corporation

20090238580 - Pre-equalized optical transmitter and pre-equalized optical transmission system: Provided is a pre-equalized optical transmitter, comprises: a laser source; a duo-binary pre-coder circuit; a pre-equalization circuit for applying an inverse function of chromatic dispersion; at least two D/A converters; and an optical field modulator comprising at least two input terminals for an electric signal. The pre-equalized optical transmitter: converts,... Agent: Mattingly & Malur, P.C.

20090238581 - Optical signal receiving circuit: To solve problematic trade-off between a bandwidth and a in-band deviation in an optical signal receiving circuit of a gigabit order that is required to have a wide dynamic range, the optical signal receiving circuit has a current-voltage conversion circuit that receives as an input a current signal outputted from... Agent: Miles & Stockbridge PC

20090238582 - Optical receiver: In an optical receiver, a light receiving element receives the optical packet signals and converts the optical packet signals to electrical signals. A bias voltage supply section supplies bias voltage to the light receiving element. A monitoring section monitors an input level of each optical packet signal or each electrical... Agent: Staas & Halsey LLP

20090232492 - Directionless optical architecture and highly available network and photonic resilience methods: The present invention provides a directionless optical architecture for reconfigurable optical add/drop multiplexers (ROADMs) and wavelength selective switches (WSSs). The directionless architecture utilizes a directionless wavelength switch coupled between client devices and ROADMs/WSSs to eliminate the need to hard-wire client devices to a wavelength division multiplexed (WDM) network. Accordingly, client... Agent: Clements Bernard PLLC

20090232493 - Wavelength drift detecting apparatus, wavelength locking system and method: An apparatus for detecting wavelength drift and a system and method for locking wavelengths are disclosed herein so that multiple optical modules can share a wavelength locking apparatus without any wavelength selecting module. The output signals of only one optical module are scrambled at a time, and the identifier information... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090232494 - Optical network, monitoring unit and monitoring method: An optical network having a tree-like structure with a main line and a plurality of branches, at least two of the branches comprising a monitoring unit for upstream signalling to the main line, wherein each of the monitoring units comprises a signal generation unit with a light source for generation... Agent: Sughrue Mion, PLLC

20090232496 - Optical communication apparatus, optical transmission system and method for reducing nonlinear degradation: This invention provides an optical communication apparatus in which the nonlinear degradation of a wavelength multiplexed signal in the nonlinear degradation factor member causing the nonlinear degradation is reduced, an optical transmission system using the same, and a method for reducing the nonlinear degradation. There are provided a wavelength interval... Agent: Nec Corporation Of America

20090232495 - Passive optical network system with mode-variable optical network unit: An optical line terminal connecting with numbers of optical network units comprises a control unit which controls each optical network unit to make it operate in a first mode in which transmission and reception of control messages and data are possible or in a second mode in which the transmission... Agent: Mattingly & Malur, P.C.

20090232497 - Directionless reconfigurable optical add-drop multiplexer systems and methods: The present invention provides a directionless reconfigurable optical add/drop multiplexer (ROADM) system. The present invention provides a scalable all-optical switching element that includes a combination of 1×N wavelength selective switches (WSS), 1×N splitters/combiners, optical amplifiers, and tunable filters to provide a fully non-blocking solution which can be deployed in a... Agent: Clements Bernard PLLC

20090232498 - Communication system using passive optical network and passive optical network: An OLT transmits and receives a CMTS/CM apparatus control signal through an apparatus physical management interface which is physically identical to or different fro a main signal interface (NNI) and processes the CMTS apparatus control signal by itself. When connection of a new ONU is detected by an ONU apparatus... Agent: Antonelli, Terry, Stout & Kraus, LLP

20090232499 - Passive optical network communication method and system: A passive optical network communication system transmits an optical time-division multiplexed signal from a central office through a passive optical coupler to a number of subscribers, and transmits optical encoded signals from the subscribers through the passive optical coupler to the central office. Optical encoded signals from different subscribers are... Agent: Rabin & Berdo, PC

20090232500 - Transamplifier, system and method for amplification of optical signals at plural wavelengths: Disclosed herein are embodiments of a device, method of use and system for an analog multi-wavelength transamplifier. The transamplifier embodiments described herein allow the use of multiple wavelengths to segment logical service groups, such as for use in a CATV distribution system and a FTTH system having a broadband overlay.... Agent: Tarolli, Sundheim, Covell & Tummino L.L.P. Cisco Systems, Inc.

20090232501 - Adaptive injection current controlled burst mode soa for long and wide reach high speed pon: An apparatus comprising an optical power splitter, an optical delay line coupled to the optical power splitter, an optical amplifier (OA) coupled to the optical delay line, and an adaptive injection current (AIC) controller coupled to the optical power splitter and the OA. Also disclosed is an apparatus comprising at... Agent: Conley Rose, P.C.

20090232503 - Optical transceiver with optical multiplexer on a flexible substrate: An optical transceiver for converting and coupling an information-containing electrical signal with an optical fiber including an optical fiber coiled over at least a portion of its length; a support element disposed in the transceiver module; a substrate for securing said coiled optical fiber to said support element to enable... Agent: Emcore Corporation

20090232502 - Visible light communication system and optical wireless lan device: A visible light communication system and an optical wireless LAN device are provided, which are capable of establishing a 10 Mbit/s LAN connection by means of an LED lighting unit which integrally has a plurality of LEDs. The optical wireless LAN device 2 has, a visible light transmission unit 202... Agent: Joseph W. Price Snell & Wilmer L.l.p

20090232504 - Optical line termination, optical network unit, optical communication system, timing control method, and recording medium storing program for apparatus: A plurality of lines which differ in transmission rate can coexist using a time division multiplexing (TDM) technique without any signal collision. An optical line termination (OLT) is connected to a plurality of lines which differ in transmission rate, and includes a timing extraction unit which extracts data transmission timing... Agent: Nec Corporation Of America

20090232505 - Multi-channel optical communication: An optical fiber communications apparatus comprises a housing provided with a motherboard and with a support defining plurality of card receptors. A plurality of modular cards (12, 13) are provided, each of which is engageable with the motherboard via one of the card receptors. A optical card (12) includes an... Agent: Emcore Corporation

20090232506 - Method and device for controlling a remote vehicle: A system and method for controlling a remote vehicle comprises a hand-held controller including a laser generator for generating a laser beam. The hand-held controller is manipulable to aim and actuate the laser beam to designate a destination for the remote vehicle. The remote vehicle senses a reflection of the... Agent: O'brien Jones, PLLC (w/irobot Corp.)

20090232508 - Communication system providing hybrid optical/wireless communications and related methods: A communication system includes at least one optical-wireless device coupled to a longitudinal side of an optical fiber. The optical-wireless device may include an optical fiber power unit for converting optical power into electrical power, and a wireless communication unit electrically powered by the optical fiber power unit. The optical-wireless... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist

20090232507 - Digital radio frequency tranceiver system and method: A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog... Agent: Milde & Hoffberg, LLP

20090232509 - Electrowetting retroreflector devices, systems, and methods: Switchable retroreflector devices that are modulated via electrowetting. The devices include an electrically-conductive polar fluid and a non-polar fluid that is immiscible with the polar fluid. The polar and the non-polar fluids differ in at least one optical property. The fluids are contained in a fluid vessel, or an array... Agent: Wood, Herron & Evans, LLP

20090232510 - Digital radio frequency tranceiver system and method: A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog... Agent: Milde & Hoffberg, LLP

20090232511 - Optical micro-connector: A low-cost, high-speed micro-connector replacement for current electrical inter-connects and intra-connects on printed circuit boards is provided. The invention permits fast and reliable information transmission over a single fiber through the utilization of an optical transmitter module or optical receiver module mounted in close proximity to a modulator used to... Agent: Wyatt, Tarrant & Combs, LLP

20090232512 - Systems and methods for chirp control of a dual arm z-modulator to minimize dispersion effect of fiber plant: The present invention provides systems and methods for chirp control of a dual arm Z-modulator to minimize dispersion in the fiber plant. The chirp control is based upon a real-time control loop based upon performance monitoring data between a transmitter and a receiver. Advantageously, the present invention enables improved performance... Agent: Clements Bernard PLLC

20090232513 - Optical signal synchronization sampling apparatus and method, and optical signal monitoring apparatus and method using the same: An electroabsorption optical modulator used as a sampling element has two optical terminals and a power supply terminal, the two optical terminals are used to input and output light, and the power supply terminal imparts an electric field to an optical path connecting the two optical terminals. The electroabsorption optical... Agent: Frishauf, Holtz, Goodman & Chick, PC

20090232514 - Optical interconnect solution: A low-cost, high-speed optical interconnect replacement for current electrical interconnects on printed circuit boards is provided. The invention achieves its goal by including an optical transmitter module or optical receiver module mounted in close proximity to a modulator used to encode optical signals from electrical impulses or decode optical signals... Agent: Wyatt, Tarrant & Combs, LLP

20090232515 - Method and an apparatus to convert a light signal emitted by a display into digital signals: The present invention provides a method and a device to convert a time varying optical pattern emitted by a display into a digital data signal. More specifically the invention allows a handheld security token to convert a time-varying light intensity pattern emitted by a source such as a computer screen... Agent: Connolly Bove Lodge & Hutz LLP

20090232516 - Optical transmission apparatus, optical transmission system, apparatus control method, and recording medium on which program for the apparatus is recorded: A removable optical interface module is used to allow an optical transmission apparatus to flexibly respond to a change from a type of service to another that uses a different light wavelength. To this end, the optical transmission apparatus is removably provided with an optical interface module storing attribute information... Agent: Nec Corporation Of America

20090232517 - Ditherless optical modulator control: A method of controlling the operating parameters of an optical modulator, without using a dither signal, is provided. Past operating parameters are compared to present operating parameters using a quality of modulation signal obtained by cross-correlating the data modulation signal used to drive the optical modulator with the modulated optical... Agent: Pequignot + Myers LLC

20090232518 - Optical transmitter with adaptively controlled optically linearized modulator: An optical transmitter for generating a modulated optical signal to be transmitted over fiber optical link. The transmitter includes: an optical source for producing an optical signal; an optically linearized modulator (OLM) as external modulator for modulating the optical signal produced by the optical source with an information carrying signal.... Agent: Emcore Corporation

20090232519 - Optical receiver for regeneration of optical signal: An optical receiver includes: a converting unit that converts an optical signal into an electrical signal; an amplifying unit that amplifies the electrical signal; a regenerating unit that regenerates the amplified electrical signal; a correcting unit that performs correction of an error included in the regenerated electrical signal; a monitoring... Agent: Staas & Halsey LLP

20090226161 - Method and system for protecting integrated optoelectronic devices: A method and system for protecting integrated optoelectronic devices are disclosed. The method includes (1) providing standby light source links of fixed wavelength and their corresponding standby data channel in a transmitting-end integrated optoelectronic device; (2) detecting whether there is failure in each active light source link in the transmitting-end... Agent: Leydig, Voit & Mayer, Ltd (for Huawei Technologies Co., Ltd)

20090226162 - Auto-prioritizing service impacted optical fibers in massive collapsed rings network outages: A method is disclosed that by correlating the network fault management, circuit provisioning data and cable inventory data, it can identify the most critical network elements that can be fixed in order to restore the services quickly in a network outage that involves high number of collapsed rings. This method... Agent: At & T Legal Department - Canavan

20090226163 - System and method for optical transmission: In an optical transmission system, a first monitoring section configured to monitor a first optical signal on a first optical transmission line to detect a first failure. A modulating section generates a second optical signal obtained through modulation of a signal corresponding to the first optical signal based on the... Agent: Nec Corporation Of America

20090226165 - Apparatus and method of controlling tap coefficient of transversal filer, optical receiver apparatus, and optical communication system: An apparatus includes an oscillator circuit configured to generate a certain oscillation signal, an adder configured to add the oscillation signal to the tap coefficient of any of one or more taps of the transversal filter, a signal-quality measurer configured to measure a signal quality of a signal output from... Agent: Staas & Halsey LLP

20090226166 - Optoelectronic transceiver with digital diagnostics: The optoelectronic transceiver includes an optoelectronic transmitter, an optoelectronic receiver, memory, and an interface. The memory is configured to store digital values representative of operating conditions of the optoelectronic transceiver. The interface is configured to receive from a host a request for data associated with a particular memory address, and... Agent: Morgan, Lewis & Bockius, LLP. (pa)

20090226164 - Predictive end-to-end management for sonet networks: A system and method is disclosed that allows for the monitoring, analyzing and reporting on performance, availability and quality of optical network paths. The correlation of PM parameter metrics to client connections, coupled with threshold-based alarm generation provides a proactive and predictive management, reporting and analyzing of the health and... Agent: At & T Legal Department - Canavan

20090226167 - Method of upgrading optical node, and an optical node apparatus: An optical node apparatus according to the present invention amplifies a WDM signal light input to an input port, and thereafter, branches the amplified WDM signal light by an optical branching coupler to send the branched lights to first and second optical paths, and selects the light propagated through the... Agent: Staas & Halsey LLP

20090226168 - Methods and apparatus for reconfigurable add drop multiplexers: Optical networks are increasingly employing optical network nodes having multiple interfaces to allow a node to direct optical signals received at any interface to any other interface connected to the node. Constructing a larger wavelength selective switching (WSS) module used in such a node can be complex and expensive. A... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20090226169 - Programmable optical network architecture: A programmable optical network architecture and associated components employing a two-level orthogonal frequency division multiplexing (OFDM)/wavelength division multiplexed (WDM) mechanisms for bandwith virtualization.... Agent: Nec Laboratories America, Inc.

20090226170 - Method, system and apparatus for transmitting data: The present invention provides a method and a system for transmitting data. The OLT sets a multiframe indication and an upstream timeslot indication overhead in the downstream frame sent to the ONU. After receiving the downstream frame, the ONU determines the upstream bandwidth position according to the multiframe indication and... Agent: Huawei Technologies Co., Ltd. C/o Darby & Darby P.C.

20090226171 - Wdm optical transmit-receive device: A WDM optical transmit-receive device comprises an optical transceiver assembly and an optical receiver assembly. The optical transceiver assembly includes a first optical platform, a first optical filter, a first photodetector and a laser diode, where the first optical platform has a first surface and a first groove recessed from... Agent: Troxell Law Office PLLC

20090226172 - Reconfigurable optical add/drop multiplexer and procedure for outputting optical signals from such multiplexer: A reconfigurable optical add drop multiplexer (ROADM) includes local interfaces at which optical signals of different wavelengths are locally input into the ROADM, and a network interface configured to connect the ROADM to a network from which multiplexed optical signals of different wavelengths are transmitted to the network. In a... Agent: Fitzpatrick Cella (tellabs)

20090226173 - Wavelength division multiplexing filter, wavelength division multiplexing system, and wavelength division multiplexing method: A wavelength division multiplexing filter according to the present invention is a wavelength division multiplexing filter having a variable filter shape. The wavelength division multiplexing filter has a resolution equal to 2N times (N being an integer, where N≧1) a reference frequency interval and has frequency arrangement of center frequencies... Agent: Nec Corporation Of America

20090226174 - Prediction of dwdm optical subnetwork degradation: A system and method is disclosed that parses WDM subnetworks and collects TL1 Performance Monitoring (PM) parameter data from subnetwork network elements (NEs) and applies a set of comparisons to discover under-performing equipment according to predetermined operating thresholds. The comparisons examine NE pump laser baseline values, deviations, efficiency, tilt error,... Agent: At & T Legal Department - Canavan

20090226175 - Method for optical time division multiplex and apparatus thereof: The present invention inputs a signal synthesized an optical pulse with a variable-wavelength laser beam different in wavelength from it to a delay unit (S1). The delay unit branches the signal to two optical signals, produces an optical path difference between them to afford a delay, synthesizes them again to... Agent: Foley & Lardner LLP

20090226177 - Communications cable and method of making same: A communications cable and method for making same wherein a communications cable is able to withstand significantly higher thermal temperatures than conventional fiber whether it be general purpose, or rated as Plenum/Riser rating, or even MIL Spec type cables. A core fiber glass material with at least an 800 Fahrenheit... Agent: Patton Boggs LLP

20090226176 - Method and apparatus for the zonal transmission of data using building lighting fixtures: This invention relates to the zonal transmission of data by optical means through the modulation of light from common building light fixtures, including the light output of fluorescent, mercury vapor, and other arc or discharge lamps and fixtures; a system for the reuse of radio frequencies by smart radios, and... Agent: William G. Lane William G. Lane, Inc., PC

20090226178 - Computerized simultaneous laser marking and targeting system: i

20090226179 - Composite input device and input method thereof: A composite input device and an input method thereof are described. A plurality of pressing members outputs a first signal in response to a press. The first signal is used for actuating a corresponding first function of each of the pressing members. A plurality of optical transceivers is respectively disposed... Agent: Workman Nydegger 1000 Eagle Gate Tower

20090226181 - Digital signal media conversion panel: A digital signal media conversion panel has a series of media converters for converting between electrical signals and fiber optic signals. The conversion panel includes a power feed for the media converters. Preferably the conversion panel includes some Power Over Ethernet receptacles thereby simplifying connection of devices such as Voice... Agent: Dennison Associates

20090226180 - Electrooptical coupling device: The invention relates to a device for coupling electrical data lines, especially a bus system, to a modular valve station which comprises a plurality of valve modules. The coupling device comprises a coupling module that can be connected to the electrical data lines for converting the electrical signals of the... Agent: The Ollila Law Group LLC

20090226182 - System and method for dual speed passive optical networks: In a dual speed passive optical network, an optical line termination (OLT) transmits a communication signal having a 10-Gb/s partition and a 2.5-Gb/s partition. The 10-Gb/s partition includes a 10 G data signal and a 2.5 G clock signal so that the PLL of a 2.5 G (legacy) optical network... Agent: Rg And Associates

20090226183 - Optical pattern recognition having reduced sensitivity to wavelength instability: In exemplary embodiments, all-optical pattern recognition for an optical input signal is achieved by wavelength-converting the input signal and then passively correlating the wavelength-converted signal based on a specified data pattern. By performing wavelength conversion using a CW laser signal having wavelength stability greater than that of the input signal,... Agent: Mendelsohn, Drucker, & Associates, P.C.

20090226184 - Optical modulation device and optical modulation method: An optical modulation device and method thereof is provided. The optical modulation device includes a decision circuit making a decision with respect to an input data signal in accordance with a timing of a first clock signal, a first modulator modulating light output based on the data signal by the... Agent: Staas & Halsey LLP

20090226185 - Fiber optic communications using hue based encoding: One aspect of the present invention can include a communication system that includes at least one optical fiber, a hue encoder, and a hue decoder. The optical fiber can convey digitally encoded information that has been encoded in an optical carrier wave. The hue encoder can digitally encode a set... Agent: Patents On Demand, P.A. Ibm-rsw

20090226188 - Burst-mode automatic gain control circuit: There is provided a burst-mode automatic gain control circuit capable of exerting gain control of a burst signal at high speed and stably. In the burst-mode ready digital automatic gain control circuit, by exerting control of a gain control circuit using a burst signal detecting circuit, gain control of a... Agent: Nec Corporation Of America

20090226189 - Coherent optical receiver and adjustment method thereof: In a coherent optical receiver, a light intensity value of signal light providing an optimum reception state is determined when ideal signal light free from waveform distortion is used as the signal light in a state where local-oscillator light is turned on. A first amplitude value of an analog electrical... Agent: Sughrue Mion, PLLC

20090226186 - Optical phase-shift-keying demodulator bias control method: The present invention provides a method for biasing/controlling an optical demodulator suitable for use in an optical phase-shift-keying (PSK) system, such as an optical differential-phase-shift-keying (DPSK) system or an optical differential-quadrature-phase-shift-keying (DQPSK) system, the method including: receiving a signal from an optical demodulator/balanced receiver pair; full-wave rectifying the signal; passing... Agent: Clements Bernard PLLC

20090226187 - Optical receiving apparatus and method: An optical receiving apparatus compensates degradation of an optical signal received, based a division operation using the intensity of the optical signal. A receiving unit outputs a first electrical signal corresponding to the phase of the optical signal and a second electrical signal corresponding to the intensity of the optical... Agent: Staas & Halsey LLP

20090220226 - Method for coordinating measurements and calibrations in a passive optical network: Method for coordinating measurements and calibrations in a passive optical network, PON, in particular in a Gigabit PON, the method comprising: generating, in an optical line termination (3), OLT, a downstream frame (25), transmitting the downstream frame (25) from the OLT to a plurality of optical network terminations (6.1 to... Agent: Harness, Dickey & Pierce, P.L.C

20090220227 - 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

20090220228 - Wide free-spectral-range, widely tunable and hitless-switchable optical channel add-drop filters: Optical devices extending the free spectral range and tunability of, and enabling hitless switching of, integrated optical filters suitable for add-drop filters. Devices include (i) a splitter device configured to split an input spectrum among a plurality of output ports, and a combiner device configured to combine at least a... Agent: Goodwin Procter LLP Patent Administrator

20090220229 - Transparent switching fabric for multi-gigabit transport: A communication apparatus includes at least one input port, multiple output ports, at least one Serial-to-Parallel (S/P) converter and at least one Parallel-to-Serial (P/S) converter. The S/P converter is operative to receive from the input port an input data stream that is to be cross-connected to a destination output port,... Agent: D. Kligler I.p. Services Ltd

20090220231 - Methods and systems for delivery of multiple passive optical network services: A system for delivering multiple passive optical network services is disclosed. The system includes a first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers. The system further includes a second optical transmission service comprising a plurality of unique wavelength... Agent: Merchant & Gould PC

20090220230 - Passive optical network based on reflective semiconductor optical amplifier: Provided is a passive optical network (PON) based on a reflective semiconductor optical amplifier (RSOA). In the PON, seed-light-injection RSOAs are used in an optical line terminal (OLT) to achieve the color-less management of the wavelengths of OLT optic sources, and wavelength reuse RSOAs are used to achieve the color-less... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090220232 - Code division multiplex communication system: A code division multiplex (CDM) communication system transmits frames including a preamble and its end bit pattern followed by a CDM signal and its end bit pattern in respective time slots. A clock recovery device at the receiving end recovers a clock signal from the preamble during the preamble time... Agent: Rabin & Berdo, PC

20090220238 - Method, device and communication equipment for controlling a burst assembly: A method for controlling burst assembly, device, and communication equipment thereof are provided. In the present invention, an assembly time and a predetermined time threshold are compared to determine a load change in a cache queue. If the load is increased or decreased suddenly, a length threshold is directly increased... Agent: Leydig, Voit & Mayer, Ltd (for Huawei Technologies Co., Ltd)

20090220236 - Multidrop communications system using wave division multiplexing: A multidrop communications system for transferring data to a plurality of devices, comprises an optical fibre having first and second ends, a plurality of light sources for producing light of different respective wavelengths, modulation means to modulate light from each light source to encode respective data thereon, the modulation means... Agent: Bracewell & Giuliani LLP

20090220234 - Optical waveband demultiplexer, optical waveband multiplexer, and optical waveband selective switch: A simple optical waveband multiplexer/demultiplexer operable to separate a wavelength-division multiplexed light beam WDM consisting of a plurality of wavebands WB each including a plurality of optical channels, into a predetermined plurality of wavebands WB, and output the separated plurality of wavebands WB from a plurality of output ports, wherein... Agent: Oliff & Berridge, PLC

20090220237 - Optical wavelength multiplexing device, optical wavelength dividing device, optical wavelength dividing multiplexing device, and method of controlling optical band-pass filter: To equip an optical wavelength dividing multiplexing system with a variable optical band-pass filter, and to provide an apparatus to change the center wavelength and the band width of an optical-band pass filter according to an optical wavelength band to be transmitted, and a method of controlling the apparatus. An... Agent: Nec Corporation Of America

20090220235 - Three-arm dqpsk modulator: A modulator is disclosed that includes three arms between a splitter portion and a coupler portion. The modulator typically requires at most a π/2 phase shift between constellation points. Accordingly, the modulator is more efficient and consumes less power.... Agent: Infinera Corporation

20090220233 - Wavelength selective switch having distinct planes of operation: A wavelength selective switch utilizing aperture-shared optics and functionally distinct planes of operation that enables high fiber port counts, such as 1×41, and multiplicative expansion, such as to 1×83 or 1×145, by utilizing elements optimized for performance in one of the functionally distinct planes of operation without affecting the other... Agent: Balser & GrellIPLaw LLC

20090220241 - Chromatic dispersion compensation designing method in optical network and a system thereof: A residual chromatic dispersion target value at a terminal node is set for each wavelength path, and also, candidates of a dispersion compensation amount settable in each chromatic dispersion compensation module on an optical network are set, and further, computation processing is executed for selecting the dispersion compensation amount in... Agent: Fujitsu Patent Center C/o Cpa Global

20090220240 - High-speed bandpass serial data link: The present invention relates to a method and system for high-speed bandpass serial data communication. A driver receives at least one data signal and generates a bandpass data signal for transmission through a bandpass waveguide interconnect. The bandpass data signal is launched into the bandpass waveguide interconnect using a first... Agent: Freedman & Associates

20090220239 - Methods and apparatus for optical transmission of digital signals: A method of communicating digital information over a dispersive optical channel includes encoding the digital information into a plurality of data blocks, each of which includes a number of bits of the information. A time-varying electrical signal is generated which corresponds with each of said data blocks. The time-varying electrical... Agent: Woodcock Washburn LLP

20090220242 - Optical adding and dropping device and optical transmission apparatus: An optical adding and dropping device includes a drop section including an input port and having a through port and a plurality of drop ports set as output ports, a first multiplexer adapted to multiplex light from the through port and light from a plurality of add ports, and a... Agent: Staas & Halsey LLP

20090220243 - Remote control relay for wirelessly-controlled devices: Methods and systems for relaying an optical signal from a remote control to a remote-controlled device such as a home entertainment device or a security device. Embodiments include at least one optical receiver and a plurality of optical transmitters. The optical transmitter positioned with an unobstructed line-of-sight to the home... Agent: Michael Best & Friedrich LLP

20090220244 - Demodulation of phase modulated fibre-optic sensor system signals: Demodulation apparatus for demodulating phase-modulated signals comprises a quadrature signal generator (QSG) for generating in-phase (I) and quadrature-phase (Q) signals in response to an unmodulated input signal. The QSG provides fast frequency tracking of the input signal and excludes any high-frequency content the input signal.... Agent: Mcdonnell Boehnen Hulbert & Berghoff LLP

20090220245 - Circuit topologies for high speed, low cost optical transceiver components: A topology for optical transceiver components comprises an electrical signal interface stage, a data timing and signal reformatting stage, and an optical fiber interface stage. Unlike transceiver components known in the art, functions having signals with the most jitter are partitioned into the electrical signal interface stage. Data timing functions,... Agent: Gregory Smith & Associates

20090220246 - Optical receiver and a free-space optical communications using the same: A device for phase distortion compensation across an optical beam is provided. The device is a part of an optical receiver, which can be used in free space optical communications, remote sensing, optical imaging and others. 2M inputs of the combiner interfere with each other via a system of tunable... Agent: Celight, Inc.

20090220247 - Rotating data transmission device with active compensation of transmission function: A rotating data transmission device for transmitting data from a data source to a data sink between a rotating part and a stationary part comprises a transmitting conductor arrangement which is fed from a transmitter means, and also a receiver means which taps signals from the transmitting conductor arrangement with... Agent: Daffer Mcdaniel LLP

20090220248 - Embedded parametric monitoring of optoelectronic modules: An optoelectronic module for converting and coupling an information-containing electrical signal with an optical fiber including a housing having an electrical input for coupling with an external electrical cable or information system device and for transmitting and receiving information-containing electrical signals over such input, and a fiber optic connector adapted... Agent: Emcore Corporation

20090220249 - Demodulation circuit: A demodulation circuit for reproducing transmitted data from a signal received by a receiver, the demodulation circuit includes a selector, converters and data recovery circuits. The selector demultiplexes the transmitted data into a plurality of divided signals. The converters receives the divided signal from the selector, respectively, the plurality of... Agent: Staas & Halsey LLP