Optical communications inventions 05/07

20070122148 - Method of monitoring and controlling the bit error rate (ber) in an optical communication network: A method is disclosed for monitoring and controlling the bit error rate (BER) in an optical communication network where an optical receiver in the optical transmission network. The method includes the steps of decombining a combined channel signal received from the network and then monitoring a real time bit error... Agent: Infinera Corporation

20070122149 - Transparent optical switch: A transparent optical switch includes network management and performance monitoring using bit level information obtained by extracting selected information on a polling basis and analyzing the extracted information in the electrical domain. In one embodiment, a signal is injected into the switch fabric of the switch via a demultiplexing device.... Agent: At&t Corp.

20070122150 - Address recognition apparatus: An address recognition apparatus may include a first normalizing unit, a second normalizing unit and an address determination unit. The first normalizing unit normalizes a first electric signal and generates a first normalized signal, wherein the first electric signal is associated with a first divided set of optical packet signals.... Agent: Sughrue Mion, PLLC

20070122151 - Band allocation control apparatus, band allocation control method, and band allocation control program: A band allocation control apparatus to control bands to be allocated to a plurality of Optical Network Units (ONUs) includes a band allocating unit which sets an allocation band to be allocated to each ONU according to a ratio of a maximum band limit value of the ONU. The apparatus... Agent: Ostrolenk Faber Gerb & Soffen

20070122152 - Method and apparatus for increasing downstream bandwidth of a passive optical network using integrated wdm/power spitting devices and tunable lasers: Methods and apparatus are disclosed for increasing downstream bandwidth of a passive optical network using integrated WDM/power spitting devices, such as the 2P1 devices, and one or more tunable lasers. An optical multiplexing/demultiplexing system is disclosed that comprises an integrated wavelength division multiplexing (WDM)/power spitting device having a WDM passive... Agent: Ryan, Mason & Lewis, LLP

20070122153 - Optical code division multiplexing transmission/reception method and optical code division multiplexing transmission/reception device: A transmission unit comprises an optical pulse train generation unit, first channel encoded optical pulse signal generation unit, second channel encoded optical pulse signal generation unit, third channel encoded optical pulse signal generation unit, and fourth channel encoded optical pulse signal generation unit; the second and fourth channels further comprise... Agent: Venable LLP

20070122154 - Bidirectional optical assembly and method for manufacturing the same: The present invention provides a bi-direction optical assembly with two optical transmitting channels by a small-sized package and relatively low cost. In the bi-directional optical assembly, the first transmitting optical subassembly (TOSA) and the receiving optical subassembly (ROSA) are optically coupled with the optical fiber via the inner housing. While... Agent: Venable LLP

20070122155 - Optical antenna with optical reference: An optical antenna assembly including multiple optical antenna elements, each of the optical antenna elements are arranged in a regular pattern and carried by a supporting body. The regular pattern of the plurality of optical antenna elements is nonuniform. Certain ones of the optical antenna elements are configured to respond... Agent: Searete LLC Clarence T. Tegreene

20070122156 - Apparatus, system, and method for interconnecting electrical and electronic signals: Embodiments of the present invention provide an apparatus for interconnecting an electrical signal from a first electronic device to a second electronic device. The apparatus includes at least one optical signal path and first and second terminals integrally integrated with the optical signal path. The first and second terminals having... Agent: Yuanmin Cai

20070122157 - Circuit, system and method for monitoring an optical fiber network: The present invention is related to a front-end circuit for an optical communication system including a laser module arranged for transmitting bursts of data signals over an optical network and a driving circuit for providing the bursts of data signals to the laser module. The front-end circuit further includes receiver... Agent: Mcdonnell Boehnen Hulbert & Berghoff LLP

20070122158 - Chromatic dispersion compensation system and method: Dispersion compensation is provided in an optical transmission system. An optical line couples first and second transceivers, and a plurality of amplifiers coupled to the optical line are spaced throughout the optical line with variable span distances. A plurality of dispersion compensation modules include a coarse granularity fiber, a connector,... Agent: Woodcock Washburn LLP

20070122159 - Passive optical network media access controller assisted clock recovery: A system, method, and computer readable medium for passive optical network media access controller assisted clock recovery which enables an optical receiver to recover a clock phase of an incoming data stream from an optical network unit comprises collecting phase data from a previous data stream clock recovery for an... Agent: Alcatel Usa Intellectual Property Department

20070122161 - Fiber optical transmission system, transmitter and receiver for dqpsk modulated signals and method for stabilizing the same: A transmitter (3) for generating a DQPSK-modulated optical signal, comprising: a splitter (7) for dividing an optical carrier signal into a first and second branch (8a, 8b), a first and second Mach-Zehnder interferometer (9, 10) in the first and second branch (8a, 8b), respectively, a phase shifter (11) in one... Agent: Sughrue Mion, PLLC

20070122162 - Method and apparatus for encoding optical power and non-payload data in an optical signal: A method and apparatus for encoding optical power and non-payload data in an optical signal is described. The method involves producing a dither modulating signal having an amplitude of indicative of the optical power in the optical signal and having a phase representing the non-payload data, and modulating the optical... Agent: Borden Ladner Gervais LLP

20070122160 - Phase controllable optical delay interferometer, optical differential phase shift keying demodulator using the same, and demodulating method therefor: An optical DPSK signal demodulator includes a signal separator that separates an optical signal into an input optical signal and an output optical signal in a signal optical path. First and second reflectors are provided at a predetermined interval and reflect the optical signals with a predetermined time delay to... Agent: Steve Y. Cho Townsend And Townsend And Crew LLP

20070122163 - Burst mode optical receiver: A system, method, and computer readable medium for burst mode optical receiver that enables an optical receiver to receive signals from a plurality of optical network units at different optical power levels comprising, collecting Received Signal Strength Indication information from a previous data stream of an optical network unit, and... Agent: Alcatel Usa Intellectual Property Department

20070116460 - Apparatus and method for adaptive adjustment and performance monitoring of avalanche photo-diode optical receiver and laser transmitter for fiber link long haul applications: A system and method for an Avalanche photo-diode (“APD”) optical receiver and laser system to adjust its performance during system operation without disturbing network traffic. Very small changes may be adaptively applied to some key portions of the system by controlling a set of main system parameters including Q-factor; Bit... Agent: Arent Fox PLLC

20070116462 - Device for optically switching between upstream and downstream optical lines, with node signature addition for tracking optical connection paths: A device (D) is dedicated to optical switching in a switching node (NC) of a transparent optical network. This device (D) comprises i) at least one input port adapted to be coupled to an upstream optical line (FE1-FE4) dedicated to the transport of multiplexed channels, ii) at least one exit... Agent: Sughrue Mion, PLLC

20070116461 - Optical digital-to-analog converter and method of optically converting digital data to analog form: An optical digital-to-analog (D/A) converter and a method of optically converting digital data into analog form. In one embodiment, the optical D/A converter includes: (1) a splitter configured to receive and split an input coherent optical carrier into a plurality of mutually coherent optical carriers, (2) a switching stage coupled... Agent: Hitt Gaines, PC Lucent Technologies Inc.

20070116463 - Bi-directional optical cross coupler: An optical cross coupler for connecting at least two different optical communication networks includes: first to fourth circulators, each circulator comprising first to fourth ports, the first port connected to a relevant communication network; a first line connecting the second port of the first circulator and the fourth port of... Agent: Cha & Reiter, LLC

20070116464 - System, device and method for supporting cut-through paths in an optical communication system: A system, device, and method for supporting cut-through pats in an optical communication system involves obtaining hop count and quality of service information by an initiating device and using the hop count and quality of service information by the initiating device to make decisions relating to a cut-through path. The... Agent: Mcguinness & Manaras LLP

20070116465 - Systems and methods for dynamic alignment of data bursts conveyed over a passive optical net work: In accordance with certain embodiments, an optical network terminal (ONT) is provided that comprises a processor module, a serializer module and an optical transmitter. The processor module may represent an FPGA device, while the serializer may represent a SERDES, with the FPGA device and SERDES being formed as distinct and... Agent: Dean D. Small Armstrong Teasdale, LLP

20070116466 - Optical network unit (onu) circuit: An optical network unit (ONU) circuit that combines both analog and digital components is provided. The ONU circuit enhances the monitoring and diagnostic of the ONU optical interface, and thus improves the overall performance of the PON. Furthermore, the disclosed ONU circuit is integrated in a single chip and thus... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

20070116467 - Passive optical network: A point-to-multi-point passive optical network (PON) includes: an optical line terminal (OLT) comprising an optical transceiver for generating a downstream optical signal and a monitoring signal and for detecting an upstream optical signal; a plurality of optical network units (ONUs) for detecting the downstream optical signal, reflecting the monitoring signal... Agent: Cha & Reiter, LLC

20070116468 - Optical tunable asymmetric interleaver and upgrade for dense wavelength division multiplexed networks: A tunable asymmetric interleaver constructed from two symmetric interleavers in series, wherein either or both of the individual symmetric interleavers exhibit a wavelength shifting ability. Advantageously, tunable asymmetric interleavers so constructed provide continuous tunable interleaving ratios from 0:100 to 50:50 to 100:0 and provide attractive upgrade paths for existing and... Agent: Brosemer, Kolefas & Associates, LLC (necl)

20070116469 - Flexible node architecture with full protection: Optical node (1) comprising at least one input port (PA, PC, PE) and a plurality of output ports (PB, PD, PF), at least one add unit (3B, 3D, 3F) for adding at least one signal on an output port (PB, PD, PF), a broadcasting unit (8) for broadcasting on at... Agent: Sughrue Mion, PLLC

20070116470 - Optical transmission apparatus, optical transmission system, and optical transmission control method: An optical transmission apparatus includes a transmitting unit for transmitting an optical signal with a specified wavelength, a multiplexing unit for multiplexing the optical signal with the specified wavelength and an optical signal with a wavelength other than the specified wavelength and outputting the multiplexed signal as a wavelength division... Agent: Whitham, Curtis & Christofferson & Cook, P.C.

20070116471 - Optical transceiver design and mechanical features: A node for use in a wireless communication network that facilitates alignment of the node with other nodes in the network and a method for aligning the node. The node includes mounting fixtures that enables the mounting of GPS receivers and a tiltmeter to obtain position and bearing information for... Agent: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.

20070116472 - Package for optical transceiver module: Provided is a package having high-density lead wires for an optical transceiver module. The package for an optical transceiver module includes a stem having through holes, a metal mount positioned on an upper surface of the stem, a signal line disposed in the metal mount, and a plurality of lead... Agent: Blakely Sokoloff Taylor & Zafman

20070116474 - Data transmission apparatus, photoelectric conversion circuit and test apparatus: The data transmission apparatus for performing data communication based on optical transmission includes a transmitting unit for converting and sending electric communication data, which is to be transmitted, into optical communication data, and a photoelectric conversion circuit for receiving the optical communication data and converting the received optical communication data... Agent: Osha Liang L.L.P.

20070116473 - System and method for transmitting data: An exemplary data transmission system for preventing noise includes a transmitter and a receiver. The transmitter includes two pins, and first pin is used for providing data and second pin is used for providing select/enable signals. The receiver includes two pins, and first pin is used for receiving data from... Agent: Wei Te Chung Foxconn International, Inc.

20070116475 - Low bias drift modulator with buffer layer: The invention relates to an electro-optic modulator structure containing an additional set of bias electrodes buried within the device for applying bias to set the operating point. Thus the RF electrodes used to modulate incoming optical signals can be operated with zero DC bias, reducing electrode corrosion by galvanic and... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist P.A.

20070116476 - Method and apparatus for generating optical duo binary signals with frequency chirp: This present disclosure provides an optical transmission method and system. The system includes a pre-coder for pre-coding an input signal into a first pre-coded signal, an encoder/separator coupled to the first pre-coded signal and arranged to encode the first and second pre-coded signals into a first encoded signal with 0... Agent: L. Howard Chen, Esq. Kirkpatrick & Lockhart Preston Gates Ellis LLP

20070116477 - Method and apparatus for producing rz-dpsk modulated optical signals: The invention provides an optical transmitter comprising a differential encoder having first and second outputs, the first and second outputs being of opposite polarity to one another, a first RZ converter connected to the first output of the differential encoder and a second RZ converter connected to the second output... Agent: Workman Nydegger (f/k/a Workman Nydegger & Seeley)

20070116478 - Calibration for optical power monitoring in an optical receiver having an integrated variable optical attenuator: Disclosed herein are various methods of calibrating optical receivers. One such method includes controlling different levels of optical power of light transmitted to an optical receiver having an integrated variable optical attenuator with a computer system. Correction factors may then be determined by comparing each of the different levels with... Agent: Blakely Sokoloff Taylor & Zafman

20070110434 - Optical path cross-connect and optical wavelength multiplexing diversity communication system using the same: A protection system protects paths of internetwork communication between WDM ring networks , and includes a plurality of optical wavelength multiplexing networks having a plurality of nodes and a network management system for monitoring conditions of the plurality of nodes. The nodes include a first node having add/drop functions of... Agent: Staas & Halsey LLP

20070110435 - Laser active optronic system with improved detectivity: The invention relates to a laser active optronic system with improved detectivity, especially an eye-safe optronic system. The system comprises a channel for the emission by an emission source of a laser beam illuminating a target and a channel for receiving the wave backscattered by the target. An optical switching... Agent: Lowe Hauptman Gilman & Berner, LLP

20070110437 - Bridging end point device supporting inter access point communication: End point device interacts directly and/or indirectly both with a first node using a first protocol and a second node using a second protocol. In one embodiment, the first node and the second node are access points. The second node does not have first node network address even if it... Agent: Garlick Harrison & Markison

20070110436 - Primary protocol stack having a secondary protocol stack entry point: A primary multi-layer protocol stack that allows a secondary multi-layer protocol stack to communicatively couple into one or more of its layers. End point device circuitry implements both the primary and secondary protocol stacks. A communication application running on the end point device initiates interaction, e.g., a session, via a... Agent: C & R Barnett Enterprises, LLC. Luther Bobinson

20070110438 - Dynamic blocking of token-controlled data transmissions in communication networks: A method for token-controlled data transmission includes receiving a token including transmission data specifying one of a plurality of data channels and a time window. A burst blocker is configured, based at least in part on the transmission data, for the selective communication of the specified data channel on an... Agent: Baker Botts L.L.P.

20070110439 - Fast optical switch: A fast optical switch is needed to realize an economical and scaleable optical-core network. In the disclosed optical switch, switching is effected by rapid wavelength conversion. Either channel switching, Time Division Multiplex (TDM) switching or both may be provided by the fast optical switch. The operation of the fast optical... Agent: Withrow & Terranova, P.l.l.c.

20070110440 - Measuring system and method for optical network: A measuring system for an optical network, which has a plurality of optical network units and an optical line terminal, includes a signal generator, a signal dividing device and a measuring device. The signal generator produces a data signal and a control signal, which is then delivered to the optical... Agent: Birch Stewart Kolasch & Birch

20070110441 - Onu management method and optical line termination: Communication of a terminal accessing a network by using a static IP address is cut off. A packet transfer device includes plural ports, a protocol processing unit and a control unit. An IP address distribution request by a DHCP protocol from a client terminal is transferred to a DHCP server,... Agent: Mcdermott Will & Emery LLP

20070110443 - Acousto-optic filter and optical cdma system using the same: Provided are an acousto-optic filter and an optical code division multiple access (CDMA) system using the acousto-optic filter. The acousto-optic filter includes: an acousto-optic mode converter (AOMC) converting an optical signal of a specific optical frequency corresponding to a frequency of an electric signal of an optical signal of a... Agent: Blakely Sokoloff Taylor & Zafman

20070110442 - Method and system for use in optical code division multiple access: A method and device are provided for automatically generating a key and a conjugate key to be used in an optical code division multiple access system. The method comprises applying a down conversion process to pump input light to thereby produce down converted broadband signal and idler fields that are... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

20070110444 - Optical device for suppressing double rayleigh backscattering noise, and an installation including the device: An optical signal processor device (14) intended to be fitted to means (10) for optically transmitting an information-carrying signal (S) comprises means (20, 22) for suppressing backscattered signals (RS) in the optical transmission means (10), an optical propagation medium (16) intended to be connected in parallel with the optical transmission... Agent: Epstein Drangel Bazerman & James, LLP

20070110445 - Optical multiple transmission method, optical network and optical transmission apparatus: In a known wavelength multiplexer, optical signals to pass are passed with their wavelengths held identical. Therefore, unless an unused wavelength common to all zones exists in case of setting an optical channel, the channel cannot be set. According to the present invention, a drop/add type wavelength multiplexer includes a... Agent: Sofer & Haroun LLP.

20070110446 - Programmable infrared data processor: An Infrared (IR) receiver includes a programmable decoder having a normal mode of operation and a proprietary mode of operation. When the programmable decoder is in the normal mode of operation, the programmable decoder decodes frames of an IR data transmission to produce decoded data. When the programmable decoder is... Agent: Garlick Harrison & Markison

20070110447 - Detecting an infrared transceiver type: An infrared controller detects an infrared (IR) transceiver type by entering an IR transceiver detection mode and providing a command to another IR transceiver. The command is formatted in accordance with a first IR transceiver type. The IR controller determines whether a response to the command is received within a... Agent: Garlick Harrison & Markison

20070110448 - Method and device for bidirectional ir data transfer between a medical treatment table and an operator control device: The invention presents a method and a device for bidirectional IR data transfer between a medical treatment table, particularly an operating table (10a to 10d), and an operator control device (12a to 12d) which are subscribers in the IR data transfer and which each comprise an IR transmitter and an... Agent: Mccormick, Paulding & Huber LLP

20070110449 - Optical semiconductor apparatus: The optical semiconductor apparatus includes, on an n-GaAs substrate, a surface-emitting semiconductor laser device and a photodiode integrated on the periphery of the laser device with an isolation region interposed there between. The laser device is composed of an n-DBR mirror, an active region, and a p-DBR mirror and includes... Agent: Sonnenschein Nath & Rosenthal LLP

20070110450 - Optical signal regenerator for high bit-rate transmission systems: A pulsed optical signal regenerator device comprises three optical stages (11,12,13) arranged in cascade between an input (14) to which is applied a signal Si to be regenerated and an output (15) at which is available a regenerated signal Sr. The first stage (11) comprises a first noise suppressor on... Agent: Coats & Bennett, PLLC

20070110451 - Polarization mode dispersion compensator and polarization mode dispersion compensating method: An amount of change of a control signal applied to a polarization controller in a polarization mode dispersion compensator is determined for each feedback loop by evaluating degree of polarization response in past feedback loops.... Agent: Staas & Halsey LLP

20070110452 - Optical transmission system for substantially equalizing the output signal level among frequency bands and substantially lowering the signal-to-noise ratio: In the WDM systems, the OSNR and the signal loss among the optical signals are substantially minimized at the receiving terminal to combat the SRS effects. An equal amount of the signal loss is expected for every span in the transmission path so that the optical amplifier gain tilt is... Agent: Knoble, Yoshida & Dunleavy

20070110453 - Optical transmitter: In an optical transmitter comprising a directly modulated laser and a wavelength filter provided on a post-stage of the directly modulated laser, the wavelength filter has a modulated light input port for inputting modulated light output from the directly modulated laser, a filter transmitted light output port for outputting light... Agent: Armstrong, Kratz, Quintos, Hanson & Brooks, LLP

20070110454 - Communication system and timing control method: A communication system and a timing control method are proposed that optimize timing in a sender and thereby enable information to be stably transmitted at the right timing. Under instructions from a timing controller in a receiver, the timing of driving a phase modulator in a sender is shifted by... Agent: Scully Scott Murphy & Presser, PC

20070104483 - Methods and apparatus for optical network management using pilot tones: Methods and apparatus for managing an optical network using pilot tones are provided. One method includes selecting an optical path having a plurality of nodes from a database defining an expected optical network. A detected list of pilot tones associated with each node of the selected optical path is generated.... Agent: Davis & Associates

20070104484 - Optical communication systems and methods of operating such optical communication systems: An optical communication system includes a first optical device including a transmission optical switch and a controller coupled to the transmission optical switch, and a second optical device coupled to the first optical device via each of a first fiber and a second fiber. The transmission optical switch is configured... Agent: Arent Fox PLLC

20070104485 - Device and method for transmitting data traffic in optical transport network: A device and a method for transmitting data traffic in an OTN are disclosed. First, all the time slots in the payload area of an OTN frame are allocated to sub-domains with certain bandwidth; then, the sub-domains are grouped into sub-domain groups to carry data traffic based on the bandwidth... Agent: Wood, Phillips, Katz, Clark & Mortimer

20070104486 - Optical network system and device, and method for controlling optical network and device: When entering an idling state, a master unit M transmits an optical signal for polling addressed to each slave unit S-1 to S-n. The slave unit S-n located at the lowest rank of a direct chain constituted by S-1 to S-n, when receiving the optical signal for polling for the... Agent: Mitchell P. Brook C/o Luce, Forward, Hamilton & Scripps LLP

20070104487 - Method and system for transferring time division multiplexing service data: The present invention discloses a method and system for transferring TDM services in GPON, the method includes the steps of: in the case of performing the GPON ranging process, buffering the uplink TDM service data received by an optical signal transceiver in an Input Buffer, reading out and transferring the... Agent: Merchant & Gould PC

20070104488 - Optical circuit and linear system dedicated node apparatus, linear system wdm network, and tree system wdm network using such: The optical circuit is attachable to a ring system dedicated node apparatus, which performs add/drop on an optical signal received from a first network and transmits to a second network, so as to convert into a linear system dedicated node apparatus that performs add/drop on an optical signal received from... Agent: Staas & Halsey LLP

20070104489 - Distributed terminal optical transmission system: The invention facilitates optical signals generated from customer premise equipment (CPE) at the edges of the metro domain networks. The CPEs are connected to extension terminals that transform the optical signal originating at the CPE into a suitable format for long haul transmission. The optical signal then propagates to a... Agent: Woodcock Washburn LLP

20070104490 - Method and system for optimum channel equalization from a serdes to an optical module: Certain aspects of a method and system for optimum channel equalization between a host Serializer-Deserializer (SerDes) and an optical module may compensate and reduce dispersion loss along an electrical transmit path of a transmitter and an optical transmit path coupled to the transmitter via pre-emphasis. The data degradation as a... Agent: Mcandrews Held & Malloy, Ltd

20070104491 - Optical regenerator in optical fiber communication system: In an optical fiber communication system, the input power to an all-optical nonlinear device in an optical regenerator is monitored and adjusted such that the regenerator operates at an optimized operation point.... Agent: Staas & Halsey LLP

20070104492 - System for and method of single slideband modulation for analog optical link: This invention describes a simple method of producing optical singlesideband suppressed-carrier (SSB-SC) modulation. The SSB-SC transmitter is a Mach-Zehnder interferometric modulator followed by an optical filter. The modulator is biased for minimum transmission of the carrier.... Agent: Burns & Levinson, LLP (formerly Perkins Smith & Cohen LLP)

20070104494 - Opitcal receiver reliably detectable loss-of-signal state: The present invention is to provide an optical receiver that prohibits the miss-detection of the recovery from the LOS (Loss-Of-Signal) state. The optical receiver includes an light-receiver device for converting an optical input signal to a photo-current, a pre-amplifier for converting this photo-current into a voltage signal, and a LOS... Agent: Venable LLP

20070104493 - Optical receiver preamplifier: An optical receiver preamplifier includes an inverting amplifier 1 and a current-voltage conversion element 2 connected between input and output terminals of the inverting amplifier 1. The inverting amplifier 1 includes a first transistor 3 having a gate connected to the input terminal In of the inverting amplifier 1, a... Agent: Mcdermott Will & Emery LLP

20070098402 - Method and apparatus for measuring optical power of very weak light, and optical communication system using the same: A method and apparatus for measuring the optical power of very weak light arriving at a receiver, by using a photon detector, are provided. A photon detector detects the presence or absence of the arrival of a photon in accordance with bias application timing. For a train of optical pulses... Agent: Foley And Lardner LLP Suite 500

20070098403 - System and method for optical network demarcation: A system and method are presented for demarcating an optical network. The system comprises an optical monitor that receives a portion of an outbound signal from an optical network and generates a switch control signal based on the intensity of the outbound signal. Generally, the switch control signal is active... Agent: Mcdonnell Boehnen Hulbert & Berghoff LLP

20070098404 - Photonic network packet routing method and packet router for photonic network: A photonic network packet routing method includes the steps of optically encoding destination address information attached to an IP packet using light attributes, discriminating the encoded address information of the IP packet by optical correlation processing, switching to an output path for the IP packet based on a result of... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070098405 - Method and system for bi-directional communication over a single optical fiber: Gigabit Ethernet connectivity is realized using off-the-shelf GIGABIT INTERFACE CONVERTER transceivers, wave division multiplexer/demultiplexers, and a single optical fiber. Simultaneous and bi-directional optical communication over a single optical fiber connecting two or more nodes is achieved by using at least one GIGABIT INTERFACE CONVERTER transceiver having at least one optical... Agent: Nixon Peabody, LLP

20070098406 - Method and apparatus for maintaining behavior of a network terminal: A method of controlling behavior of an element in a passive optical network (PON) is provided. The method includes (i) issuing a message from a first PON element to a second PON element to cause the second PON element to enter or maintain a state of upstream communications, the state... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20070098407 - Methods and apparatus for communication using uv light: Communication methods and apparatus using ultraviolet (UV) light are provided. Save UV communication devices, including remote control units, can use highly efficient UV LEDs and very low-noise UV photodetectors. In some cases, the LEDs emit light at wavelengths below 400 nm, below 320 nm, or even below 280 nm. In... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20070098408 - Optical packet switching apparatus and methods: An optical packet switch switches optical packets according to bit-rates at which the optical packets are provided. For example, optical packets that are received at similar bit-rates may be routed to a destination at separate time slots over a single channel wavelength, and optical packets that are received at different... Agent: Doron Handelman

20070098409 - Pulse modulating photodetector and electronic device: The invention provides a pulse modulation photodetector, which detects, by projecting pulsed light, presence or absence of a physical object based on whether the pulsed light is received or not according to passage of the physical object. The pulsed light has a pulse width modulated according to a light emission... Agent: Birch Stewart Kolasch & Birch

20070098410 - Method and apparatus for extracting optical clock signal: An apparatus and method for extracting an optical clock signal are provided. The apparatus includes a first reflection filter selecting and reflecting only a first frequency component in an input optical signal; a first Fabry-Perot laser diode matching the first frequency component reflected by the first reflection filter with a... Agent: Blakely Sokoloff Taylor & Zafman

20070098411 - Method and apparatus for automatic shut-down and start-up of optical amplifiers in optical networks: A method and apparatus for automatic shut-down and start-up of optical amplifiers in wavelength division multiplexed (WDM) optical networks include use of an optical channel monitor (OCM) to monitor loss and return of an input signal. By using the OCM to separately monitor the power level of each individual channel,... Agent: Dr. Mark M. Friedman C/o Bill Polkinghorn - Discovery Dispatch

20070098412 - Optical signal jitter reduction via electrical equalization in optical transmission systems: An optical transmission system comprises an electrical source and an electrical-to-optical converter. The electrical source is adapted to provide an electrical signal at an output thereof. The electrical-to-optical converter has an input coupled to the output of the electrical source and is operative to convert the electrical signal to a... Agent: Ryan, Mason & Lewis, LLP

20070098413 - Optical logic element: An optical logic element includes a first interferometer modulating a continuous optical signal in response to first and second optical signals to output a first modulation signal, and a second interferometer modulating the continuous optical signal in response to a sum signal equal to the sum of the first and... Agent: Lee & Morse, P.C.

20070098414 - Second order predistortion circuit: A predistortion generator for coupling in-line with a non-linear device produces an output predistorion signal of useful amplitude, but with low composite triple beat and cross modulation distortions. The predistortion circuit comprises a distortion circuit which utilizes the non-linear current flowing through at least one diode, to provide a desired... Agent: General Instrument Corporation Dba The Connected Home Solutions Business Of Motorola, Inc.

20070098415 - Method and system for stabilizing operation of laser sources: a controller sensitive to the power sensing signal and configured for selectively adjusting the bias (IB) and modulation (IM) currents of the laser source by: detecting an error between the actual average output optical power from the laser source and the target average value,comparing the error against a given error... Agent: Avago Technologies, Ltd. C/o Klaas, Law, O'meara & Malkin, P.C.

20070098417 - Distortion cancellation circuitry for optical receivers: An optical receiver having a photodetector coupled to an external optical fiber for receiving an optical communications signal and converting it into an electrical signal; an RF amplifier coupled to the electrical output of the photodetector and generating an output signal with distortion; and a post-distortion circuit connected to the... Agent: Casey Toohey Emcore Corporation

20070098416 - Optical receiver and discrimination-threshold generating method: A first average detecting circuit detects an average of output signals of a pre-amplifying unit that controls an amplification gain based on a result of comparison between an output of the first average detecting circuit and a predetermined reference voltage. A discriminating circuit receives an output signal of the pre-amplifying... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.