Optical communications inventions 10/08

20080260378 - Method of ethernet frame forward error correction initialization and auto-negotiation: A method of managing forward error correction (FEC) initialization and auto-negotiation in ethernet passive optical networks includes receiving FEC data from an optical network unit (ONU 105), and the optical line terminal (OLT 103) responds to the ONU with FEC data. Upon receiving data not forward error corrected from an... Agent: Mark M Friedman C/o Polkinhorn

20080260379 - Transceiver optical subassembly: The subassembly includes a laser for emitting signals towards fibers to be monitored, a passive alignment carrier, a first photodetector for monitoring reflected laser signals from the fibers, a second photodetector for monitoring laser output power, and an optical fiber. The laser is disposed within the passive alignment carrier. The... Agent: Naval Air Warfare Center Aircraft Division Office Of Counsel Bldg 435

20080260380 - Method of providing duplex optical communications and optical modulator therefor: Methods of providing duplex free-space optical, communication comprising receiving a time-shift keying (TSK) encoded signal and selectively re-modulating—and optionally retro-reflecting—received TSK pulses so as to transmit an on-off keying (OOK) signal. Related apparatus and signals are also provided.... Agent: Mcdonnell Boehnen Hulbert & Berghoff LLP

20080260381 - Communication apparatus using chaotic signal and method thereof: A communication apparatus using a chaotic signal and a method thereof are provided. The communication apparatus includes a correlator which multiplies source data by one of an optical orthogonal code (OOC) and a prime sequence code (PSC), and outputs transmission data, a transmission signal generating unit which generates a chaotic... Agent: Sughrue Mion, PLLC

20080260382 - Ring transmission apparatus and signal processing method: On an optical ring network side, an optical ring transmission apparatus is provided with a first ring-side TDM device and a separately implemented first packet ring device, on a first ring side. On a client network side, the apparatus is provided with a first client-side TDM device and a first... Agent: Young & Thompson

20080260383 - Centralized resource management in wavelength selective switch based wavelength cross connect systems: A Centralized Resource Management (CRM) system that supports the sharing of all the transponders in a WXC node, i.e., any spare transponder can be reconfigured to accommodate any drop channel, regardless of wavelength or input port. Consequently, network restoration in case of network failures is supported as well as the... Agent: Brosemer, Kolefas & Associates, LLC (necl)

20080260384 - Optical element integrated module: In an optical element integrated module, first through n-th optical data signals are externally input to first ports of first through n-th optical circulators and are input to first through n-th optical/optical converters via second ports. The first through n-th optical/optical converters modulate first through n-th optical short pulse trains... Agent: Rabin & Berdo, PC

20080260385 - Signal processing apparatus and method for gigabit passive optical network: A signal processing apparatus for use in an optical line termination or optical network unit in a gigabit passive optical network encapsulates Ethernet signals, time-division multiplexed signals, and asynchronous transfer mode signals in the same way in a novel type of frame. The same input and output circuits can accordingly... Agent: Rabin & Berdo, PC

20080260386 - Reconfigurable optical add drop multiplexer core device, procedure and system using such device, optical light distributor, and coupling-ratio assigning procedure: A reconfigurable optical add drop multiplexer core device includes a light distributor, a light combiner, and first and second sets of add and drop ports. The light distributor is configured to receive an optical signal along a primary input of the reconfigurable optical add drop multiplexer core device and to... Agent: Fitzpatrick Cella (tellabs)

20080260387 - Output current pumping circuit and remote controller using the same: r

20080260389 - Method and a system for optimizing radio network layer to implement the network interconnection, and a method for interconnection between the radio network and the wired network: A method for optimizing a radio network layer to implement a network interconnection is provided. A radio network controller is divided into radio access network servers and wireless adapters configured in a base station. The wireless adapters are adapted to process related radio interface protocols, and are connected to an... Agent: Harness, Dickey & Pierce, P.L.C

20080260388 - Time division duplexing remote station having low-noise amplifier shared for uplink and downlink operations and wired relay method using the same: A wired relay method for using a remote station and an apparatus thereof for a Radio over Fiber (RoF) wired relay system supporting a Time Division Duplexing (TDD) wireless communication service, which shares an Low-Noise Amplifier (LNA) for both uplink and downlink operations. The remote station includes a block for... Agent: Cha & Reiter, LLC

20080260390 - Bistable liquid crystal optical device: A bistable liquid crystal-based optical device operates with reduced or zero power consumption and maintains a switching state during power loss. The optical device includes a bistable liquid crystal material that maintains a stable molecular orientation in the absence of an electrical field. The optical device further includes a beam... Agent: Patterson & Sheridan, L.L.P.

20080260392 - Illuminator including optical transmission mechanism: An illuminator including an optical transmission mechanism includes a transmission-side electric circuit for forming electric signals modulated in response to information, a light source for emitting intensity-modulated light in response to the electric modulated signals, optical wavelength conversion means including fluorescent material for converting part of the intensity-modulated light into... Agent: Morrison & Foerster LLP

20080260391 - Optical communication apparatus and optical communication method: An optical communication apparatus is disclosed. The optical communication apparatus includes a light transmission section, a light reception section, and a control section. The light transmission section causes a light emitting portion which outputs light in a visual line direction of a user to transmit information. The light reception section... Agent: Wolf Greenfield & Sacks, P.C.

20080260393 - Transceiver and method for high-speed auto-compensating quantum cryptography: Provided are an auto-compensating quantum cryptography transceiver and method of transmitting a quantum cryptography key at a high speed. A quantum cryptography transmitter includes a wavelength converter, an optical attenuator, an optical phase modulator, and a Faraday mirror. A quantum cryptography receiver includes a polarization beam splitter, an optical coupler,... Agent: Rabin & Berdo, PC

20080260394 - Method and apparatus for dispersion mitigation in optical links: An optical communications system includes an optical transmitter that generates a modulated optical signal at an output. The modulated optical signal propagates through an optical link where the dispersion of the optical link is imprinted onto an optical spectrum of the modulated optical signal. A demodulator receives the modulated optical... Agent: Rauschenbach Patent Law Group, LLC

20080260378 - Method of ethernet frame forward error correction initialization and auto-negotiation: A method of managing forward error correction (FEC) initialization and auto-negotiation in ethernet passive optical networks includes receiving FEC data from an optical network unit (ONU 105), and the optical line terminal (OLT 103) responds to the ONU with FEC data. Upon receiving data not forward error corrected from an... Agent: Mark M Friedman C/o Polkinhorn

20080260379 - Transceiver optical subassembly: The subassembly includes a laser for emitting signals towards fibers to be monitored, a passive alignment carrier, a first photodetector for monitoring reflected laser signals from the fibers, a second photodetector for monitoring laser output power, and an optical fiber. The laser is disposed within the passive alignment carrier. The... Agent: Naval Air Warfare Center Aircraft Division Office Of Counsel Bldg 435

20080260380 - Method of providing duplex optical communications and optical modulator therefor: Methods of providing duplex free-space optical, communication comprising receiving a time-shift keying (TSK) encoded signal and selectively re-modulating—and optionally retro-reflecting—received TSK pulses so as to transmit an on-off keying (OOK) signal. Related apparatus and signals are also provided.... Agent: Mcdonnell Boehnen Hulbert & Berghoff LLP

20080260381 - Communication apparatus using chaotic signal and method thereof: A communication apparatus using a chaotic signal and a method thereof are provided. The communication apparatus includes a correlator which multiplies source data by one of an optical orthogonal code (OOC) and a prime sequence code (PSC), and outputs transmission data, a transmission signal generating unit which generates a chaotic... Agent: Sughrue Mion, PLLC

20080260382 - Ring transmission apparatus and signal processing method: On an optical ring network side, an optical ring transmission apparatus is provided with a first ring-side TDM device and a separately implemented first packet ring device, on a first ring side. On a client network side, the apparatus is provided with a first client-side TDM device and a first... Agent: Young & Thompson

20080260383 - Centralized resource management in wavelength selective switch based wavelength cross connect systems: A Centralized Resource Management (CRM) system that supports the sharing of all the transponders in a WXC node, i.e., any spare transponder can be reconfigured to accommodate any drop channel, regardless of wavelength or input port. Consequently, network restoration in case of network failures is supported as well as the... Agent: Brosemer, Kolefas & Associates, LLC (necl)

20080260384 - Optical element integrated module: In an optical element integrated module, first through n-th optical data signals are externally input to first ports of first through n-th optical circulators and are input to first through n-th optical/optical converters via second ports. The first through n-th optical/optical converters modulate first through n-th optical short pulse trains... Agent: Rabin & Berdo, PC

20080260385 - Signal processing apparatus and method for gigabit passive optical network: A signal processing apparatus for use in an optical line termination or optical network unit in a gigabit passive optical network encapsulates Ethernet signals, time-division multiplexed signals, and asynchronous transfer mode signals in the same way in a novel type of frame. The same input and output circuits can accordingly... Agent: Rabin & Berdo, PC

20080260386 - Reconfigurable optical add drop multiplexer core device, procedure and system using such device, optical light distributor, and coupling-ratio assigning procedure: A reconfigurable optical add drop multiplexer core device includes a light distributor, a light combiner, and first and second sets of add and drop ports. The light distributor is configured to receive an optical signal along a primary input of the reconfigurable optical add drop multiplexer core device and to... Agent: Fitzpatrick Cella (tellabs)

20080260387 - Output current pumping circuit and remote controller using the same: r

20080260389 - Method and a system for optimizing radio network layer to implement the network interconnection, and a method for interconnection between the radio network and the wired network: A method for optimizing a radio network layer to implement a network interconnection is provided. A radio network controller is divided into radio access network servers and wireless adapters configured in a base station. The wireless adapters are adapted to process related radio interface protocols, and are connected to an... Agent: Harness, Dickey & Pierce, P.L.C

20080260388 - Time division duplexing remote station having low-noise amplifier shared for uplink and downlink operations and wired relay method using the same: A wired relay method for using a remote station and an apparatus thereof for a Radio over Fiber (RoF) wired relay system supporting a Time Division Duplexing (TDD) wireless communication service, which shares an Low-Noise Amplifier (LNA) for both uplink and downlink operations. The remote station includes a block for... Agent: Cha & Reiter, LLC

20080260390 - Bistable liquid crystal optical device: A bistable liquid crystal-based optical device operates with reduced or zero power consumption and maintains a switching state during power loss. The optical device includes a bistable liquid crystal material that maintains a stable molecular orientation in the absence of an electrical field. The optical device further includes a beam... Agent: Patterson & Sheridan, L.L.P.

20080260392 - Illuminator including optical transmission mechanism: An illuminator including an optical transmission mechanism includes a transmission-side electric circuit for forming electric signals modulated in response to information, a light source for emitting intensity-modulated light in response to the electric modulated signals, optical wavelength conversion means including fluorescent material for converting part of the intensity-modulated light into... Agent: Morrison & Foerster LLP

20080260391 - Optical communication apparatus and optical communication method: An optical communication apparatus is disclosed. The optical communication apparatus includes a light transmission section, a light reception section, and a control section. The light transmission section causes a light emitting portion which outputs light in a visual line direction of a user to transmit information. The light reception section... Agent: Wolf Greenfield & Sacks, P.C.

20080260393 - Transceiver and method for high-speed auto-compensating quantum cryptography: Provided are an auto-compensating quantum cryptography transceiver and method of transmitting a quantum cryptography key at a high speed. A quantum cryptography transmitter includes a wavelength converter, an optical attenuator, an optical phase modulator, and a Faraday mirror. A quantum cryptography receiver includes a polarization beam splitter, an optical coupler,... Agent: Rabin & Berdo, PC

20080260394 - Method and apparatus for dispersion mitigation in optical links: An optical communications system includes an optical transmitter that generates a modulated optical signal at an output. The modulated optical signal propagates through an optical link where the dispersion of the optical link is imprinted onto an optical spectrum of the modulated optical signal. A demodulator receives the modulated optical... Agent: Rauschenbach Patent Law Group, LLC

20080253761 - Detecting abnormality in an optical receiver: An optical apparatus comprising: a branching unit branching an input light modulated by DQSPK format and thereby outputting a first branched light and a second branched light; a first branch and a second branch inputting the first branched light and the second branched light, respectively, the first branch and the... Agent: Staas & Halsey LLP

20080253762 - Method and system for performance monitor for digital optical dwdm networks: A system for performance monitoring for a DWDM network. The system includes a photonic integrated device configured to receive an optical signal and output a first plurality of electrical signals for a plurality of channels respectively. The system also includes a clock and data recovery device configured to receive the... Agent: Townsend And Townsend And Crew, LLP

20080253763 - Optical transmission apparatus: An optical transmission apparatus is arranged by: means for demultiplexing monitoring light for received wavelength-multiplexed signal light so as to detect optical intensity of the monitoring light; means for detecting optical intensity of wavelength-multiplexed signal light after the monitoring light has been demultiplexed therefrom; a gain controlling type optical amplifier... Agent: Antonelli, Terry, Stout & Kraus, LLP

20080253764 - Methods and systems to stabilize an optical network against nodal gain changes: The present invention provides methods and systems to stabilize an optical network against nodal gain changes through two nested control loops for controlling node gain and node output power. The present invention includes two nested control-loops running at different update speeds including: an inner, faster, control-loop which sets the gains... Agent: Clements Bernard Miller

20080253765 - Optical power measuring apparatus and optical signal receiving apparatus comprising same: An optical power measuring apparatus for measuring a power level of an optical signal comprised of a light intensity modulated signal, received by a light receiving element is provided. In the apparatus, a first signal path including a first voltage detection circuit and a first amplifier circuit supplies a processor... Agent: Fish & Richardson P.C.

20080253766 - Synchronization and processing of secure information via optically transmitted data: A method and device enables data communication via optical pulses from a light source of an electronic device. A data transfer interface is provided to support processing of selected data by a processor of the electronic device. The electronic device comprises an illumination light source, which is selectively utilized for... Agent: Dillon & Yudell, LLP

20080253767 - Method and system for hitless tunable optical processing: A method for switching from a first optical path optically coupled to an optical processing device to a second optical path, the first and second optical paths optically connecting, in parallel configuration, a first optical switch to a second optical switch, according to the following steps: directing optical radiation comprising... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20080253768 - High bit rate packet generation with high spectral efficiency in an optical network: Optical packets are generated by generating a first optical beam with a first wavelength and a second optical beam with a second optical beam. The first optical beam is modulated with a payload signal and then filtered to reduce the bandwidth of the signal. The second optical beam is modulated... Agent: Nec Laboratories America, Inc.

20080253769 - Management method of optical fiber network system: A management method of an optical fiber network system is disclosed. The optical fiber network system includes at least one user apparatus and an optical network unit (ONU), and the ONU is connected with the user apparatus. The management method includes the steps of: adopting at least one information string,... Agent: Birch Stewart Kolasch & Birch

20080253770 - Optical transmission device and optical transmission method: An output control unit outputs data of bit rate A to a first header-attaching unit and data of bit rate B to a second header-attaching unit. An instructing unit instructs the first or the second header-attaching unit to attach a header of bit rate being the least bit rate to... Agent: Staas & Halsey LLP

20080253771 - Method and apparatus for configuring optical network terminals (ont) in a network: A method and system allowing a network operator to change services on a large group of Optical Network Terminals (ONTs) at one time through the use of profiles. At least one profile is configured, and at least one of the profiles is associated with at least one Optical Network Terminal... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20080253772 - Remote controller, electronic apparatus, and remote control system: A remote controller sets up a pairing via two-way communications. The remote controller contains a light-emitting unit that emits a pairing-set-up request code for requesting a pairing-set-up start using infrared rays. The remote controller also contains a communication unit that receives unique information transmitted using the radio wave in response... Agent: Lerner, David, Littenberg, Krumholz & Mentlik

20080253773 - System and communication method for interconnecting optical network and radio communication network: A system and communication method for the system interconnecting the optical network with the radio communication network is provided. The solution mainly applies to an optical access network employing fiber for transmission and the radio communication network connected to the optical access network, wherein a base station of the radio... Agent: Harness, Dickey & Pierce, P.L.C

20080253774 - Device having a casing containing a potting material for transmitting signals between electronic components: A device including: at least two electronic/electrical components; and a casing, the casing having at least a portion thereof acting as a communication bus for connecting the at least two electronic/electrical components.... Agent: Thomas Spinelli

20080253775 - Electrically programmable pulse generator, in particular a pulse generator of very high resolution phase and intensity profiles: The modulated pulses are transmitted to input B of the coupler. The optical loop connects output D to input A of the coupler. This coupler is commanded such that, according to a first command (K=0), it transmits the light received on its two inputs A, B towards output D, and... Agent: Thelen Reid Brown Raysman & Steiner LLP

20080253776 - Optical signal receiver: An optical signal receiver is provided for converting an optical signal being intensity-modulated with high frequency signals, to desired frequency electric signals for output. The optical signal receiver (50) according to the invention receives and converts an optical signal being intensity-modulated with high frequency signals such as a microwave or... Agent: Fitch Even Tabin And Flannery

20080253777 - Compensating for data degradation: The present invention relates to a communication system having a central station and a plurality of outstations. The central station is configured to execute a compensation procedure for compensating for degradation of data from the outstations, the compensation procedure having a plurality of adjustable characteristics, which characteristics are governed by... Agent: Nixon & Vanderhye, PC

20080247752 - Eye safety in electro-optical transceivers: An electro-optical transceiver module having at least one parallel optical transmit lane and at least one parallel optical receiver lane, the module comprising optical receiver lane signal detection circuitry to detect a loss of signal on one or more of the receive lanes, and optical transmit lane control circuitry to... Agent: Emcore Corporation

20080247753 - Optoelectronic switch having cascaded optical nodes: An optical switch assembly is provided having a plurality of optoelectronic switching nodes. Each node is a three terminal optical device having a first optical input, a second optical input and an optical output. Each node can be electrically activated or deactivated via an electrical control input. Each node has... Agent: Lumen Patent Firm, Inc.

20080247754 - Method and apparatus for adjusting timeslot fragments of multiple links: A method and apparatus for adjusting timeslot fragments of multiple links in an Automatically Switched Optical Network (ASON). The method includes the steps of: obtaining link information of multiple links necessary for timeslot fragment adjustment, calculating adjusted link information of each link according to the link information, and adjusting a... Agent: Darby & Darby P.C.

20080247755 - Circuit for transmitting signals in a network node, particularly for a channel card for an optical wavelength division multiplex (wdm) signal trasmitting device: m

20080247756 - Method and apparatus for transmitting multiple channels in a wavelength division multiplexed (wdm) optical communication system with reduced raman crosstalk and nonlinear distortions: A method and apparatus is provided for transmitting a WDM optical signal. The method begins by modulating an odd number of optical channels that are each located at a different wavelength from one another with (1) a respective one of a plurality of information-bearing electrical signals that all embody the... Agent: Motorola, Inc. Law Department

20080247757 - Method of controlling device by using universal remote control: A method of controlling a device with a universal remote control includes obtaining and storing an image of an operation panel of a remote control that controls the device, assigning a control command received to control the device to an input key area contained in the image, storing the input... Agent: H.c. Park & Associates, PLC

20080247758 - Position determination system using radio and laser in combination: A combined radio and laser positioning system comprising: a network of ground based radio communication devices, a laser transmitter configured to generate at least one laser beam, and at least one user unit. Each user unit comprises a radio receiver configured to receive at least one ranging radio signal transmitted... Agent: Law Offices Of Boris G. Tankhilevich

20080247759 - Devices, systems and methods for ad hoc wireless communication: The current options for wireless communication have changed the way people work and the way in which networks can be deployed. However, there remains unresolved problems in the setup and configuration of wireless communication links. Both known cellular and ad hoc wireless networking protocols and systems are deficient in that... Agent: Herman & Millman

20080247760 - System for wireless alarm reporting: A system for wireless alarm reporting is disclosed. A system that incorporates teachings of the present disclosure may include, for example, a network interface device (NID) having a translator element to convert an optical signal supplied by a communication system to one or more electrical signals supplied to one or... Agent: Akerman Senterfitt

20080247761 - Pluggable optical transceiver with command line pulled up to external power supply: A pluggable optical transceiver with a function not affecting the command status of the host system appeared in the internal bus, which is coupled with the command line within the transceiver, even when the transceiver is plugged in the host system. The optical transceiver provides a power supply circuit and... Agent: Smith, Gambrell & Russell

20080247762 - Pluggable optical transceiver: The present invention provides a new releasing mechanism form a cage on the host system for a pluggable optical transceiver. The transceiver includes an optical receptacle, an actuator with a hook that latches with the key hole of the cage, a bail attached so as to rotate in front of... Agent: Smith, Gambrell & Russell

20080247763 - Chirped laser with passive filter element for differential phase shift keying generation: A method for generating D-N-PSK optical signals is disclosed wherein a laser is modulated to generate optical signal pairs including phase modulated and fixed phase portions, the phase modulated portions having a frequency encoding one or more data symbols and the fixed phase portion having a carrier frequency and a... Agent: Workman Nydegger

20080247764 - Method and system for synchronising an optical transmitter with an optical modulator: A method of synchronising an optical transmitter and modulator comprising transmitting a calibration sequence of pulses from the transmitter to the modulator; varying a control timing drawn from the set comprising the transmit interval timings and the modulator transmission interval timings; monitoring the resulting pulses transmitted by the modulator and... Agent: Mcdonnell Boehnen Hulbert & Berghoff LLP

20080247765 - Power source for a dispersion compensation fiber optic system: This invention generally relates to an optical filter for a fiber optic communication system. An optical filter may be used, following a directly modulated laser source, and converts a partially frequency modulated signal into a substantially amplitude modulated signal. The optical filter may compensate for the dispersion in the fiber... Agent: Workman Nydegger

20080247766 - Pin/tia system for use in fttx applications: A system is disclosed for an improved ROSA that has increased sensitivity for permitting greater numbers of ONTs to be connected to an optical network per defined transmission line distances. ROSA configuration includes a digital optical module with improved performance characteristics. This digital optical module has replaced a conventional photodiode... Agent: Wilmerhale/boston

20080240710 - Optical communication system, optical communication apparatus, and method of monitoring fault alarm in path section detour: The optical communication system of the present invention is constructed with a data plane and a control plane, and includes a first monitor for monitoring a path alarm on the data plane, a second monitor for monitoring a path alarm on the control plane, and an alarm comparator for comparing... Agent: Sughrue Mion, PLLC

20080240712 - Method and system of monitoring a data transmission link, particularly an optical, bidirectional data transmission link: Systems and methods for monitoring a data transmission link, especially an optical, bidirectional data transmission link, in which a digital transmit signal is transmitted on a first transmission path from a local end of the data transmission link toward a remote end of the data transmission link. A portion of... Agent: The Culbertson Group, P.C.

20080240711 - Optical network evaluation systems and methods: Embodiments of optical network evaluation systems and methods are disclosed. One system embodiment, among others, comprises a processor configured with logic to provide a cross layer model of disturbance propagation in an optical network based on a combination of a physical layer model and a network layer model, the physical... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20080240713 - Method and apparatus for automatic restoration detection and automatic restoration of optical communication system: Methods and apparatuses for automatic restoration detection and automatic restoration of optical communication system are disclosed. In the methods, a first station sends an automatic restoration detection message to a second station at the opposite side of a failed link; in response to receiving an automatic restoration request message, determines... Agent: Marshall, Gerstein & Borun LLP

20080240714 - Station terminating device, subscriber terminating device, communication system, control method of the devices, and recording medium recorded with program: To shorten the service downtime as a communication system and to provide improved performance in communication by only checking if a device, in which the continuation of communication has become impossible, has recovered, a station terminating device includes: a connection management unit for maintaining without stopping a bandwidth allocation to... Agent: Nec Corporation Of America

20080240716 - Beam position sensor: A beam direction sensor for determining the direction of each beam in an array of light beams. The invention basically consists of a screen positioned to intersect the array of beams and a video camera to record the position of the images of the intersections. The screen can be any... Agent: Trex Enterprises Corp.

20080240715 - Optical fiber array alignment unit: An optical fiber alignment unit for the easy precise alignment of optical fibers in and array. In a preferred embodiment the positioning array is incorporated twice in an all optical cross connect switch utilizing MEMS mirrors for cross connecting optical fibers in a first set of optical fibers to optical... Agent: Trex Enterprises Corp.

20080240717 - Optical transmitter/receiver module: Efficient absorption of radio wave emission can be ensured from a high frequency signal processing circuit in an optical transmitter/receiver module. The optical transmitter/receiver module pluggable to a communication device includes a housing having openings on an anterior and a posterior ends; an optical connector disposed at the anterior opening;... Agent: Staas & Halsey LLP

20080240718 - Free-space communications system and method: Embodiments of the invention are directed to a free-space communications system, a signal transmission platform for a free-space communications system, and a method for free-space communications, that advantageously provide or have the potential to provide measurable improvements in free-space communications over a turbulent atmospheric transmission path. A principal feature of... Agent: Bond, Schoeneck & King, PLLC

20080240719 - Method and apparatus for establishing system delay time and frame length in time division duplexing system: A method of establishing a system delay time and a frame length in a Time Division Duplexing (TDD) system includes adjusting time lengths of an uplink (UL) frame, a downlink (DL) frame, a Transmit/receive Transition Gap (TTG), and a Receive/transmit Transition Gap (RTG); a Base Station (BS) transmitting a DL... Agent: Cha & Reiter, LLC

20080240720 - Terminal device, center device, optical communication network system and upstream signal timing control method: An upstream signal timing control method which controls a timing of an upstream optical signal, from a terminal device to a center device, to a timing that the center device intends. Optical clock pulses synchronized with the timing that the center device intends are sent from the center device to... Agent: Rabin & Berdo, PC

20080240722 - Communications device: A transmission device that includes: a radio signal transmission processing section that transmits a radio carrier wave overlaid with transmitting information after being modulated by pulse position modulation; an optical signal transmission processing section that transmits an optical carrier wave overlaid with the transmitting information after being modulated by the... Agent: Harness, Dickey & Pierce, P.L.C

20080240721 - Optical receiver, reception control method and reception control program: An exemplary aspect of the present invention is an optical receiver which is used in an optical transmission system, and which receives an optical signal and converts the optical signal into an electrical signal, the optical receiver comprising a controller, and a delay interferometer, wherein the controller sends, to the... Agent: Nec Corporation Of America

20080240723 - 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 Miller

20080240725 - Optical receiver and optical transceiver using the same: A small, low cost, low power-consumption optical receiver transmits signals at a high bit rate of approximately 10 Gbps over a long distance of 100 km or longer without chromatic dispersion compensation. An optical filter with a variable filtering wavelength is provided in the optical waveguide. A frequency-modulated signal light... Agent: Nec Corporation Of America

20080240724 - System and method for cable monitoring: Embodiments include methods, apparatus, and systems for cable monitoring. One embodiment includes a method that receives data from an optical transceiver coupled to a cable and a RFID (radio frequency identification) device mounted to the cable. The data from the optical transceiver and RFID device is used to determine an... Agent: Hewlett Packard Company

20080240726 - Phase coded non-return-to-zero optical transmitter: Embodiments of the present invention provide a method and apparatus for producing a phase coded non-return-to-zero (PC-NRZ) optical signal. The method includes providing an input optical signal; providing first and second drive signals, the first drive signal having a first data pattern of first and second signal levels, the second... Agent: Tongqing Wang

20080240727 - Tunable dispersion compensator: The tunable dispersion compensator 10 of the present invention comprises: the Mach-Zehnder interferometers (MZIs) 21 to 25 cascaded on a planar lightwave circuit; and the tunable couplers 31 to 34 connected to between each corresponding pair of the MZIs respectively. The Y-branch waveguide 15 and 16 are used for connecting... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080240728 - Electrical generation of return-to-zero (rz) data pattern with flexible duty cycle adjustment for optical transmission: An electrical return to zero (RZ) encoder converts non-return to zero (NRZ) data, into of RZ data patterns with a flexibility for duty cycle adjustment so that any RZ data pattern may be provided for a specific application's need. A duty cycle of>50% or<50% may be achieved by selecting between... Agent: Intel Corporation C/o Intellevate, LLC

20080240729 - Data transmission system and transmission code generating method for the same: A data transmission system comprising a transmitter and a receiver. The transmitter comprises a phase encoder for partitioning consecutive bit data to be input in data in units of X bits; and converting a 2x value indicated by the data of X bits in unique association with an (N/2-1)Y value... Agent: Stanley P. Fisher Reed Smith LLP

20080240730 - Fiber connectivity for emergency response personnel: A network may include fiber optic lines and fiber distribution panels connected by the one or more fiber optic lines. At least one of the fiber distribution panels may include an optical fiber connector designated as a connector that is for emergency use. The network may further include a plurality... Agent: Verizon Patent Management Group

20080240731 - Optical repeater: On the upstream side of a quantum dot optical amplifier, a polarization beam splitter with one input and two outputs is provided. Two optical fibers connected to output sections of the polarization beam splitter are connected to input sections of the quantum dot optical amplifier in a state that both... Agent: Kratz, Quintos & Hanson, LLP

20080240732 - Optical communication module and control method thereof: An optical communication module includes a driving unit, an optical transmitting unit, a control unit and a signal transform control unit. The driving unit outputs a bias signal and a modulation signal in accordance with a bias control signal and a modulation control signal. The optical transmitting unit is electrically... Agent: Birch Stewart Kolasch & Birch

20080240733 - Dispersion compensator for frequency reshaped optical signals: An optical transmitter is disclosed including an optical signal source generating a frequency modulated signal encoding data. An optical spectrum reshaper is positioned to receive the frequency modulated signal and converts the frequency modulated signal into a reshaped signal having increased amplitude modulation relative to the frequency modulated signal. A... Agent: Workman Nydegger

20080240734 - Multimode optical transmission device: An optical transmitting circuit (2) modulates multimode oscillation light using an information signal, subjects at least one oscillation-mode light beam of the multimode oscillation light to a predetermined operation, and outputting the result to an optical transmission channel. An optical receiving circuit (8) receives an optical signal transmitted through the... Agent: Wenderoth, Lind & Ponack L.L.P.

20080240739 - Differential circuit with precisely controlled terminator circuit: The present invention provides a precisely controlled terminator circuit of a differential amplifier, in particular, for a differential amplifier of an optical receiver. The differential circuit, which receives a differential signal by a first input for the normal phase signal and a second input for an anti-phase signal, provides a... Agent: Smith, Gambrell & Russell

20080240736 - Inter-symbol interference-suppressed colorless dpsk demodulation: An optical device includes an interferometer for a received optical differential phase shift keying DPSK signal, and an equalizer integrated with the interferometer in a manner for reducing from optical filtering effects an interference by signal bits of the DPSK signal with signal bits of a contiguous DPSK signal. The... Agent: Nec Laboratories America, Inc.

20080240737 - Optical receiver and control method for optical receiver: An optical receiver converting an optical signal modulated by differential phase shift keying to electrical first and second data signals; generating a clock signal from the first data signal; demultiplexing the first data signal into two signals; latching the two signals using the clock signal; delaying the clock signal by... Agent: Staas & Halsey LLP

20080240738 - Optical receiver, optical communication device, and optical signal receiving method: An optical receiver including a demodulator to convert an in-phase signal of a received differential phase modulated optical signal into a first electrical signal, and to convert a quadrature signal of the received differential phase modulated optical signal into a second electrical signal; a decision member deciding logic states of... Agent: Staas & Halsey LLP

20080240735 - Symmetrical optical receiver: The invention relates to a symmetrical optical receiver comprising a photodiode (Ph) and a symmetrical transimpedance amplifier (TIA). The cathode (K) or respectively the anode (A) of the photodiode (Ph) is connected via a first capacitor (C1) or respectively second capacitor (C2), to the first input or respectively second input,... Agent: Pearne & Gordon LLP