Optical communications inventions 08/08

20080205882 - Extended range for cwdm optical transport: A optical transmission system includes light sources generating light of at least two wavelengths, where any two adjacent wavelengths are separated by less than 10 nm. The wavelengths fall within the zero dispersion zone of an optical fiber, and may be shifted by 1 nm or less to reduce crosstalk... Agent: Fsp Llc

20080205883 - Device for measuring the profile of very short single pulses: o

20080205884 - Polarization controlled interferometric chirp characterization: The invention relates to determining a chirp property) of an optical device, comprising: receiving an input optical signal from the optical device and generating an output optical signal by providing a change of a state of polarization by means of a polarization controller operating at a first setting and an... Agent: Agilent Technologies Inc.

20080205885 - Optical network monitor pcb: A fiber pigtailed network monitoring module incorporating an optical printed circuit board on which a signal-transferring connection is remotely actuated between electronic components mounted on the board and active and/or passive optical devices mounted on the board to generate remotely readable monitoring signals.... Agent: Baker & Daniels LLP

20080205886 - Method and device for in-band optical performance monitoring: A method and device for determining in-band noise of an optical signal. The optical signal is split to produce two optical signal components, of distinct polarisation, such that the respective noise component in each signal component is uncorrelated. The optical signal components are converted to the electrical domain to produce... Agent: Snell & Wilmer LLP (oc)

20080205887 - Integrated wavelength selectable photodiode using tunable thin film filters: An integrated wavelength selectable photodiode includes a device package having an input that receives an optical signal. A set-and-hold, thermally tunable thin-film filter is positioned in the device package and includes an input that is optically coupled to the input of the device package. The set-and-hold, thermally tunable thin-film filter... Agent: Rauschenbach Patent Law Group, Llc

20080205888 - Semiconductor optical amplifier type gate switch drive circuit, semiconductor optical amplifier type gate switching drive, and optical cross connect: A drive circuit is provided for a semiconductor optical amplifier type gate switch includes a first transmission path and a second transmission path. The first transmission path includes a common first sub-path between a signal source and a first node; and an individual second sub-path for each of a plurality... Agent: Staas & Halsey LLP

20080205889 - Optical transmission system and optical transmission method: In an optical transmission system, a transmitting transceiving node generates a multiplexed optical-packet signal by performing optical wavelength multiplexing on a plurality of optical packets, and transmits the multiplexed optical-packet signal to a receiving transceiving node. The receiving transceiving node transmits the multiplexed optical-packet signal back to the transmitting transceiving... Agent: Staas & Halsey LLP

20080205890 - Method for transmitting lacs protocol via an optical communication line: A technique for exchanging LCAS control information between a first network element and a second network element interconnected by a bi-directional optical communication line, while conveying substantially unidirectional data traffic in the form of a virtual concatenated group (VCG) binary stream transmitted in a first direction via the bi-directional optical... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

20080205891 - Method for processing overheads of optical communication system and signal processing device: A method for processing overheads in an optical communication system and a signal processing device are disclosed. The method includes: in a receiving direction, conduct an O/E and S/P conversion for the received optical signal, extract overheads necessary for overheads processing; transmit the overheads in serial; conduct an S/P conversion... Agent: Marshall, Gerstein & Borun LLP

20080205892 - Underwater optical communications system and method: An underwater optical communications system and method particularly suitable for use in communications with automated equipment. A series of light beacons are dispersed throughout a communications zone. The light beacons are each provided with a plurality of light-emitting elements and light receiving elements which are positioned so that each beacon... Agent: Dimock Stratton LLP

20080205893 - Angular seam for an electronic module: In one example embodiment, an angular seam includes a first complementary structure defined in a first shell of an optoelectronic transceiver module, and a second complementary structure defined in a second shell of the optoelectronic transceiver module. The second complementary structure is configured to receive the first complementary structure so... Agent: Workman Nydegger

20080205894 - Optical module for optically coupling optical fiber and surface optical device: An optical module including a first optical device having an opening on a surface thereof, and a second optical device including a pillar-shaped elastic member on a surface thereof. The first and second optical devices are optically coupled to each other.... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20080205895 - Optical subassembly positioning device for an electronic module: In one example embodiment, an optical subassembly (OSA) positioning device includes a front piece, a top back piece, and a top connector piece connecting the front piece and the top back piece, a bottom back piece, and a bottom connector piece connecting the from piece ad the bottom back piece.... Agent: Workman Nydegger

20080205896 - Positioning plate for optical subassembly: In one example, an optical subassembly positioning plate is provided that includes a substantially flat body that defines at least one edge. A port is defined in the body. The port is configured to receive and secure an optical subassembly in an x-direction and a y-direction when said optical subassembly... Agent: Workman Nydegger

20080205897 - Linearized trans-impedance amplifier: The disclosed systems and methods utilize an advanced linearized trans-impedance amplifier (ATIA) that allows for the recovery and amplification of low amplitude analog and digital signals. This disclosure further describes unique approaches of addressing issues inherent in the transmission and reception of small amplitude multi-carrier signals used for distribution of... Agent: Mcdermott Will & Emery LLP

20080205898 - Method and device for a flag: A flag that is lit with lights in the body of the flag with the aid of optic fibers. Optionally, the flag can remain outstretched regardless of wind. Optionally, the light shines from behind the material of the flag or between layers of flag material, to reveal patterns or letters... Agent: Uzi Ezra Havosha & Partners

20080205899 - Optoelectronic transmitting and receiving device: An optoelectronic transmitting and receiving device, including a pierced platform including at least one through hole for introduction of an optical fiber, a first optoelectronic element integral with the platform, arranged substantially facing the through hole and configured to emit or receive a first laser beam at a first wavelength,... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080205900 - Status link for multi-channel optical communication systems: A robust and redundant status link is established by a first multi-channel optoelectronic device with a second multi-channel optoelectronic device in a multi-channel communication link. Transmitter bias currents are effectively modulated with a status link modulation signal representative of status data and subsequently modulated with primary data modulation signals. The... Agent: Workman Nydegger

20080205901 - Method and apparatus for dwdm line card: A system and method for multiple-channel line card. The system includes a first photonic integrated device configured to receive a first optical signal and output a first plurality of electrical signals for a first plurality of channels respectively. The first plurality of channels corresponds to a first plurality of wavelength... Agent: Townsend And Townsend And Crew, LLP

20080205902 - Optical transmission control circuit: An optical transmission control circuit includes: an analog input section which receives optical transmissions states as analog values; an A/D conversion section which converts the analog values into digital values; a value storage section which stores maximum value of the digital values provided by the A/D conversion section; an output... Agent: Leydig Voit & Mayer, Ltd

20080205904 - Electric field sensor device, transceiver, positional information obtaining system, and information input system: When a human hand (100) holds a transceiver (3a), the hand holds a bottom of an external wall surface and a side of the external wall surface of an insulating case (33). Therefore, a transmitting and receiving electrode (105) and an insulating film (107) cover not only the bottom of... Agent: John S. Pratt, Esq Kilpatrick Stockton, LLP

20080205903 - Optical transmission system: An optical transmission system which provides bandwidth restricted optical signal comprises an input terminal (10) for accepting an electrical binary signal, an amplifier (12) for amplifying said electrical binary signal to the level requested for operating an electrical-optical converter (16) such as a Mach Zehnder light modulator, a bandwidth restriction... Agent: Kratz, Quintos & Hanson, LLP

20080205905 - Digital phase estimator, digital phase locked loop and optical coherent receiver: The present invention provides a digital phase estimator, a digital phase locked loop and an optical coherent receiver. The optical coherent receiver comprises a local oscillator laser, for supplying a local oscillator optical signal; an optical 90 degree frequency mixer, for mixing a received optical signal with the local oscillator... Agent: Staas & Halsey LLP

20080205906 - Preamplifier and optical receiving apparatus using the same: When an optical signal that is a wide dynamic range and different in level depending on burst signals is input as in a GPON system, a preamplifier can stably control the gain within a short preamble. The gain changeover of the preamplifier is controlled by the aid of timing information... Agent: Miles & Stockbridge Pc

20080205907 - Optical receiver, optical audio apparatus, optical communication apparatus and optical reception method: An optical receiver with a threshold voltage convergence and audio apparatus and communication apparatus using the optical receiver are provided. The optical receiver of the present invention includes an optical detector for converting a received optical signal to a current signal; a transimpedance amplifier for converting the current signal to... Agent: Christie, Parker & Hale, LLP

20080199178 - 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 LLP

20080199179 - Transmission system and system startup method: An exemplary aspect of the invention is a transmitter for transmitting an optical signal, comprising a level comparing unit for measuring an input level of an entered optical signal, and determining whether the input level has exceeded a preset level and a controller for performing high-speed control of the level... Agent: Nec Corporation Of America

20080199180 - Optical network terminal and a message processing method, a message processing apparatus and system thereof: The present invention discloses a message processing method of optical network termination (ONT), including: the ONT receiving an uplink message; the ONT performing a corresponding VLAN tagging operation in accordance with the characteristic value of the uplink message, wherein at least two types of uplink messages with different characteristic values... Agent: Leydig, Voit & Mayer, Ltd (for Huawei Technologies Co., Ltd)

20080199181 - Optical transmission apparatus with optical amplifiers: An optical transmission apparatus including an optical amplifier for providing a high-power optical amplifier on the receive side, in which a wavelength of pumping light for an optical amplifier on the transmission side is suitably shifted to be different from a wavelength of pumping light for an optical amplifier on... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080199182 - Transmission system and transmission method: A wavelength division multiplexing system according to the present art adjusts the amount of dispersion compensation (the amount of dispersion compensation of an NZ-DSF and a DCF) every all spans on the basis of the time slot when an intensity modulation signal transmitter outputs an intensity modulation signal and the... Agent: Staas & Halsey LLP

20080199183 - Interface method between remote radio unit and centralized transceiver station: The present invention discloses a method for transmitting signal between a central channel processing Main Unit (MU) and one or more Remote Radio Units (RRUs) by using SDH/OTN in Centralized Base Transceiver Station system using remote radio head (RRH) technology. The method includes: dividing the communication interface between the MU... Agent: Greenberg Traurig, LLP

20080199184 - Terminal and information relay apparatus: A terminal and an information relay apparatus allowing automatic setup for wireless connection without requiring setup operation by the user and capable of preventing information leakage when used at home are provided. A wireless LAN terminal communicates with a wireless access point relaying information to and from a communication apparatus... Agent: Osha Liang L.L.P.

20080199185 - Method an apparatus for obtaining real-time measurements of optical signals in an optical network with minimal or no interruptions in communications over the network: High-speed measurements of the output power level of a laser are obtained by using a high-speed optical monitoring device that is capable of producing an electrical feedback signal having an amplitude that varies based on the amount of light impinging on the monitoring devices. These signals are processed and measured... Agent: Kathy Manke Avago Technologies Limited

20080199186 - Optical receiver: A receiver for a differentially phase shift keying formatted optical signal, such as an RZ-DPSK formatted optical signal. Dither control loops are provided for controlling path length in a demodulator and/or for controlling the center wavelength of an optical band pass filter. A feedback loop is provided for controlling the... Agent: Grossman, Tucker, Perreault & Pfleger, PLLC

20080199187 - Fiber optic cable assembly for optical transceiver: Disclosed is an optical floating sub-assembly, comprising a thermally conductive non rigid substance between the heat sink carrier and external casing, to minimize mechanical stress on the optical assembly. Also disclosed is a printed circuit board as an electrical interface, comprising two modules capable of converting an electrical signal to... Agent: Laubscher & Laubscher, P.C.

20080199188 - Interferometric communication: Embodiments of interferometric communication are disclosed.... Agent: Hewlett Packard Company

20080199189 - Colorless optical demodulator for differential quadrature phase shift keying dwdm systems: A colorless optical DQPSK demodulator and system operating over multiple, equally-spaced DWDM channels with fixed optical delays—capable of demodulating DQPSK within signals within DWDM communications wave bands on ITU grids using delay interferometers having fixed free spectral range at 20 GHz or 25 GHz.... Agent: Brosemer, Kolefas & Associates, LLC

20080199190 - Optical receiver: An optical receiver comprising: a photoelectric converting unit converting an input optical signal into an converted electrical signal; a splitting unit splitting the converted electrical signal into a plurality of split electrical signals; an amplifier amplifying one of the plurality of the split electrical signals with a first input time... Agent: Staas & Halsey LLP

20080199191 - Maximum likelihood sequence estimation for high spectral efficiency optical communication systems: Severe inter-symbol interference (ISI), introduced by narrow-band optical filtering in high spectral efficiency wavelength-division multiplexed (WDM) systems to avoid coherent WDM crosstalk, can be substantially mitigated by the use of maximum-likelihood sequence estimation (MLSE) reception. Compared to conventional threshold detection, the use of an MLSE receiver allows, for example, a... Agent: Brosemer, Kolefas & Associates, LLC - (lucent)

20080199192 - Optical receiver: A receiver for a differentially phase shift keying formatted optical signal, such as an RZ-DPSK formatted optical signal. Dither control loops are provided for controlling path length in a demodulator and/or for controlling the center wavelength of an optical band pass filter. A feedback loop is provided for controlling the... Agent: Grossman, Tucker, Perreault & Pfleger, PLLC

20080193124 - Optical protection switch and method for optical protection switching: An optical protection switch and a method for optical protection switching are provided. The optical protection switch includes a loop mirror-based optical switch with two circulators and a direction-dependent phase shifter in the loop mirror. The direction-dependent phase shifter introduces phase shifts in counter-propagating optical signals in the loop mirror... Agent: Smart & Biggar P.o. Box 2999, Station D

20080193125 - Apparatus and method for measuring the quality of burst signals and performing optical line diagnostics: Apparatus and method to measure the quality of burst signals and to perform optical line diagnostics in and optical passive optical network (PON). Statistical information about phase noise (jitter), signal distortion, clock distortions, and any other effects present in burst signals is generated. The statistics are based oil phase and... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

20080193126 - Spectral measurement apparatus and measurement method utilizing brillouin scattering: The present invention relates to a spectral measurement apparatus and measurement method utilizing Brillouin scattering, which judge the state of the temperature or strain of an optical fiber more quickly. The spectral measurement apparatus comprises a light source, an analysis section, and an anomaly judgment section. The light source outputs... Agent: Venable LLP

20080193127 - System and method for a channel guard in a reconfigurable optical add-drop multiplexer: The present invention provides a colorless multiplexing system and method for detecting new optical channels at power levels below that which would cause data errors in existing traffic, and on top of background light, thus, overcoming a known risk inherent in colorless multiplexing—that a channel of the same wavelength as... Agent: Clements Bernard Miller

20080193128 - Computer ethernet card based on passive optical network: The present invention relates to a computer Ethernet card used for a passive optical fiber access network and its data transmission terminals. A hardware network system that is based on a PON system optical network unit and is coupled to a computer via PCI interfaces is disposed. The hardware network... Agent: Dorsey & Whitney LLP Intellectual Property Department

20080193129 - Video transmission system of a ring network: It is an objective to provide a video transmission system enabling easy acquisition and addition of any video signal. According to the ring network, optical wavelength multiplexing and transmission of video signal to be utilized for this network is carried out, so that it is possible to implement an environment,... Agent: Day Pitney LLP

20080193130 - Pon system with a remote upstream repeater: A signal coupler (20) for a passive optical network (PON) system is disclosed. The coupler (20) includes a first port for two-way feeder side communication with a PON terminal (12), a star coupler (29), other ports (23) for two-way distribution side communication with each of plural remote optical network units... Agent: Snell & Wilmer LLP (oc)

20080193131 - Time division multiplexing of inter-system channel data streams for transmission across a network: A time division multiplexing (TDM) facility is presented for time division multiplexing at least two inter-system channel (ISC) data streams to create a TDM multiplexed data stream. The TDM multiplexed data stream can be forwarded across the network over a single wavelength of a wavelength division multiplexing (WDM) network. The... Agent: Heslin Rothenberg Farley & Mesiti P.c.

20080193132 - Wdm pon based on dml: Low-cost FP lasers can be implemented in the upstream links of a WDM PON system by configuring them for single-mode operation. In a typical embodiment, an FP laser at a subscriber unit is injection seeded with CW seed light from a DFB laser or an ASE source at a central... Agent: Workman Nydegger

20080193133 - Scalable reconfigurable optical add-drop multiplexer: A system and methods are disclosed for a hybrid silicon-organic scalable reconfigurable optical add-drop multiplexer. An embodiment of a scalable reconfigurable optical add-drop multiplexer (ROADM) includes an optical bus for optical signals of different wavelengths, a plurality of add/drop optical waveguides, and a plurality of ring resonators, each being optically... Agent: Hugh P. Gortier

20080193134 - Planar lightwave circuit based tunable 3 port filter: The invention relates to a tunable optical add/drop module (TOADM) monolithically integrated on a single planar lightwave circuit (PLC). The present invention overcomes the shortcomings of the prior art by providing virtual pupils at the interface between the channel waveguides and the slab waveguide on the PLC for focusing each... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist P.a.

20080193135 - Collimated ball lenses for optical triplexers: Optical triplexers are disclosed. The optical triplexers include an optical fiber, a first ball lens optically coupling a first optical signal between a first opto-electronic device and a first wavelength selective filter, and a second ball lens optically coupling a second optical signal between a second opto-electronic device and the... Agent: Workman Nydegger

20080193136 - Inline repeater and optical fiber communication system: An inline repeater that uses a forward-pumped DRA that can use a pumping light source such as an FBG pumping light source and a fiber laser, which are the most commonly used, and an optical fiber communication system are realized. The optical fiber communication system comprises silica fiber as a... Agent: Harness, Dickey & Pierce, P.L.C

20080193137 - Method and apparatus for extending broadband communication services over a wireless link while protecting the network from performance degradations caused by the wireless link: A method and apparatus is provided for communicating information from a customer to a broadband access network. The method begins when a wireless access point receives from a subscriber module a wireless RF carrier signal modulated with customer information. The customer information is demodulated and forwarded to a broadband modem... Agent: Motorola, Inc. Law Department

20080193138 - Roll-calling mechanism based vision system for elevator positioning: A positioning system comprising a plurality of transponder modules each located at a known location for receiving an electromagnetic signal and emitting a light signal, at least one transceiver module for emitting an electromagnetic signal and receiving the light signal, and apparatus processing the received light signal to determine a... Agent: Bachman & Lapointe, P.c.

20080193139 - Two-way communication in an autonomous in vivo device: An autonomous in-vivo sensing device that includes a transceiver that may for example transmit wireless signals to for example an external receiver, and receive wireless signals from for example an external transmitter. In some embodiments the wireless signals received by such device may include control or command signals that may... Agent: Pearl Cohen Zedek Latzer, LLP

20080193140 - Optical network unit transceiver module with arrayed i/o video contacts: Pluggable ONU transceiver modules are disclosed that include an optical connector configured to connect to an optical network. The pluggable ONU transceiver modules further includes a transmit line including a laser driver and a laser. The pluggable ONU transceiver modules further includes a first receive line including a first optical... Agent: Workman Nydegger

20080193142 - Hermetically coupling device: A hermetic coupling device between an optoelectronic component emitting and/or receiving a light beam, and an optical transmission mechanism conveying the light beam. The hermetic coupling device includes a substrate including a blind hole, having a bottom wall, into which one part of the optical transmission mechanism is inserted. The... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080193141 - Optical transmitter-receiver module: A small optical transmitter-receiver module capable of regulating the light output level, without changing the mounting position of a laser diode or modifying the laser diode itself, is provided. In the module, a waveguide substrate which forms a planar lightwave circuit, a semiconductor laser element serving as a laser oscillation... Agent: Nec Corporation Of America

20080193143 - Chirp-managed, electroabsorption-modulated laser: s

20080193144 - Slow chirp compensation for enhanced signal bandwidth and transmission performances in directly modulated lasers: The frequency chirp modulation response of a directly modulated laser is described using a small signal model that depends on slow chirp amplitude s and slow chirp time constant τs. The small signal model can be used to derive an inverse response for designing slow chirp compensation means. Slow chirp... Agent: Workman Nydegger

20080193145 - Optical transmitting apparatus and temperature controlling method used therefor: An optical transmitting apparatus includes an optical filter, a port that monitor light transmitted through the optical filter, a port that monitor not light transmitted through the optical filter, an optical waveguide substrate on which the optical filter and an optical waveguide which includes a port that monitors the characteristic... Agent: Nec Corporation Of America

20080187310 - Network testing apparatus, network testing method and recording medium thereof: This G-PON network testing apparatus composes a network by connecting between an OLT, ONU or ONT by a optical fiber. This testing apparatus stores testing items and code numbers in a storing section by correlating them from each other. It obtains data receiving time and transmits the data to a... Agent: Staas & Halsey LLP

20080187311 - Selection of a signal input from an optical fiber member: Methods and systems for analyzing optical parameters of a selected optical fiber member are disclosed. A signal input from an optical fiber member may be selected by instructing a corresponding optical separation device. The output from the corresponding optical separation device may be combined with the outputs of other optical... Agent: At&t Corp.

20080187312 - Passive optical network system and operating method thereof: A Passive Optical Network system implementing a parent station capable of receiving high-speed burst signals transmitted from a plurality of subsidiary stations to a parent station, with excellent bandwidth utilization efficiency in the link from the stations to the parent. The system is provided with a configuration in which, when... Agent: Mcdermott Will & Emery LLP

20080187313 - Countermeasures for idle pattern srs interference in ethernet optical network systems: Optical networks as defined by the IEEE 802.3ah standard suffer from Stimulated Raman Scattering (SRS) that causes data transmission at a first optical wavelength to interfere with broadcast video transmission at a second optical wavelength in single mode optical fibers. The problem is exacerbated when data is not being transmitted... Agent: King & Spalding LLP

20080187314 - Reflective semiconductor optical amplifier-based optical access network system having improved transmission quality: Disclosed herein is an optical access network system in which the transmission quality of an upstream signal is remarkably improved in an optical access network in which a Reflective Semiconductor Optical Amplifier (RSOA) is used as the light source for each subscriber. The most important characteristics of the present invention... Agent: H.c. Park & Associates, PLC

20080187315 - Bi-directional optical module with improved optical crosstalk: The bi-directional optical module, which installs the receiver and the transmitter within one package, is disclosed with an improved optical crosstalk. The optical module provides a lens, a WDM filter and a photodiode (PD) on an axis of the single mode fiber coupled with the module, while, a laser diode... Agent: Venable LLP

20080187316 - Modular optical transceiver: An optical transceiver converting and coupling an information-containing electrical signal with an optical fiber including a housing conforming to the industry standard XENPAK™ form factor including an electrical connector for coupling with an external electrical cable or information system device and for transmitting and/or receiving an information-containing electrical communications signal,... Agent: Emcore Corporation

20080187317 - Transmission system and transmission apparatus: On an optical access network, transmission at different bit rates is realized without modifying subscriber units. A low-speed signal generating part generates a low-speed signal having a low bit rate. A high-speed signal generating part generates a high-speed signal having a high bit rate. A recovery signal generating part generates... Agent: Staas & Halsey LLP

20080187318 - Vehicle-use communication apparatus for receiving information transmitted by modulated light from signal lamp of traffic signal apparatus: A communication apparatus of a first vehicle receives information conveyed by modulated light emitted by a signal lamp of a traffic light apparatus or by the tail lamp of a preceding vehicle, and can relay the information to a second (following) vehicle, by modulated light emitted from a tail lamp... Agent: Harness, Dickey & Pierce, P.L.C

20080187319 - Multi-channel optoelectronic module: In one example, an optoelectronic transceiver includes an optical transmitter with which a set of operating wavelengths is associated. A temperature sensor and heat transfer device are thermally coupled with the optical transmitter, and drive circuitry is provided that is in communication with the heat transfer device. The optoelectronic transceiver... Agent: Workman Nydegger

20080187320 - Optical connector, a communication system and a method of connecting a user circuit to an optical transceiver: The invention provides an optical connector for connecting a user circuit to an optical backplane, in use the connector being adapted for mounting on a user circuit. The connector comprises an active or passive photonic interface through which optical signals may be transmitted and received between a user circuit and... Agent: Pillsbury Winthrop Shaw Pittman, LLP

20080187321 - Optical transceiver module: An optical transceiver module of the present invention includes: a light emitting device; a photodetector; and a shielding member covering the photodetector and having a hole for providing an optical path for a received beam incident to the photodetector; wherein the received beam incident to the photodetector forms an angle... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080187322 - Optical high-rate pulse position modulation scheme and optical communications system based thereon: It is an object of the present invention to provide a communications system for communication between two remote terminals, where even at very long distances between these two terminals and/or at very small signal-to-noise ratios a robust communication is possible. The invention achieves the goal set before by suggesting an... Agent: Mccormick, Paulding & Huber LLP

20080187323 - Optical receiver and controlling method thereof, and optical transmission system: The optical transmitter and receiver of the invention includes: a variable dispersion compensator that performs wavelength dispersion compensation on an optical signal of a differential M-phase modulation format input from a transmission path; an optical amplifier that compensates an optical loss in the variable dispersion compensator; a delay interferometer that... Agent: Staas & Halsey LLP

20080187324 - Optical transmitter and control method therefor: The disclosed optical transmitter and control method include performing phase modulation of a light propagating through a corresponding optical path in accordance with a data signal, supplying bias voltages for regulating an operating point of each of phase modulation performed, imparting a predetermined phase difference, supplying bias voltages for phase... Agent: Staas & Halsey LLP

20080187325 - Temperature stabilizing packaging for optoelectronic components in a transmitter module: An optical transmitter is disclosed having a temperature stabilization system for an optical filter for maintaining constant the frequency response of the filter. The filter is mounted within a housing having a substantially higher thermal conductivity. The housing may include a copper-tungsten alloy and extend along the optical axis of... Agent: Workman Nydegger