Optical communications inventions 11/07

20070274719 - Passive optical network rogue optical network unit diagnostics: A system, method, and computer readable medium for passive optical network rogue optical network unit diagnostics, comprises, detecting an alarm of a network, correlating the detected alarm to a bandwidth map, and selectively disabling an optical network unit upstream to the detected alarm on the bandwidth map for a pre-determined... Agent: Alcatel Lucent Intellectual Property & Standards

20070274722 - Method of communicating for a communication apparatus: A method of communicating for a communication apparatus, which includes: a terminal apparatus transmitting the information frames to a central office apparatus; the central office apparatus receiving the information frames and obtaining the terminal apparatus information from the information frames; the central office apparatus processing the information frames transmitted from... Agent: Conley Rose, P.C.

20070274724 - Wavelength selective switch design configurations for mesh light-trails: In accordance with the teachings of the present invention, wavelength selective switch (WSS) design configurations for mesh light-trails are provided. In a particular embodiment, a node included in an optical network comprises a first light access unit operable to add or drop local traffic and a first WSS assembly communicatively... Agent: Baker Botts L.L.P.

20070274725 - Optical transmission apparatus: In an optical transmission apparatus, optical power of each of wavelength contained in a wavelength multiplexing signal is measured, a measured value of the optical power of each wavelength is compared with a predetermined threshold value, a total value of the measured values of the optical power, which are equal... Agent: Staas & Halsey LLP

20070274712 - Method for detecting and localizing faults in an optical transmission path, and optical transmission system: A method for detecting and locating faults in an optical transmission path, and to an optical transmission system having such a functionality, is provided. By measuring the temporal change in the state of polarization SOP, external influences on a glass fiber cable of a long-haul transmission system, e.g., a WDM... Agent: Kenyon & Kenyon LLP

20070274713 - System and method for subcarrier modulation as supervisory channel: An apparatus and method for processing a supervisory signal for optical network applications. The apparatus includes a subcarrier transmission system configured to receive a first supervisory signal and output a second supervisory signal, and an electrical-to-optical conversion system configured to receive the second supervisory signal and a first data signal... Agent: Townsend And Townsend And Crew, LLP

20070274714 - Optically multiplexed imaging system and methods of operation: The invention describes an optical multiplexer for increasing optical data collection efficiency across at least two fields of view. The optical multiplexer includes a first optical path for operatively receiving optical data from a first field of view and at least one beam deflection system for operatively receiving optical data... Agent: Davidson Berquist Jackson & Gowdey LLP

20070274715 - Node for an optical communication network: A node for an optical communication network comprises at least one switching unit (2), a plurality of optical interfaces (1) for connecting to a WDM transmission line (3), which comprise a demultiplexer (4) for disassembling a multiplex signal arriving from a WDM transmission line (3) into a plurality of input... Agent: Coats & Bennett, PLLC

20070274717 - Broadband optical network apparatus and method: Methods and apparatus for providing enhanced optical networking service and performance which are particularly advantageous in terms of low cost and use of existing infrastructure, access control techniques, and components. In the exemplary embodiment, current widespread deployment and associated low cost of Ethernet-based systems are leveraged through use of an... Agent: Robert F. Gazdzinski, Esq. Gardzinski & Associates

20070274716 - Methods and apparatus to provide local warning of a low battery condition from an optical network terminal: Methods and apparatus for providing local warning of a low battery condition from an optical network terminal to a device in a customer premises are disclosed. An example optical network terminal is coupled to a power supply having a battery. The power supply sends a data signal to the optical... Agent: Hanley, Flight & Zimmerman, LLC

20070274718 - Method and apparatus for communicating between a legacy pon network and an upgraded pon network: Methods and apparatuses consistent with the present invention facilitate the transition from a legacy network to an upgraded network by providing a converter that communicates between the legacy network and the upgraded network. The converter is provisioned such that legacy devices, such as Optical Network Units (ONUs), appear as upgraded... Agent: Siemens Corporation Intellectual Property Department

20070274721 - N-way broadcast / narrowcast combiner: Systems and methods are described for an optiplex. A method includes: conveying a first narrowcast signal to a first optical combiner; conveying a second narrowcast signal to a second optical combiner; tapping into said first narrowcast signal; monitoring a first characteristic of said first narrowcast signal; tapping into said second... Agent: John Bruckner, P.C.

20070274720 - Optical network unit activation: Optical network unit activation may be provided. First, an account may be associated with a port ID and a first ID. Next, activation data may be received including a serial number of a device and a received ID. Then, it may be determined that the data was received on a... Agent: D. Kent Stier Merchant & Gould, PC

20070274723 - Optical network and amplifier node therefore: An optical network comprises a transmitter node (1), a receiver node (4) and an optical fibre (3) for transmitting an optical wavelength-division multiplex signal having payload channels and a supervisory channel between the nodes (1, 4). At least one of the nodes has an amplifier (8, 13) which is passed... Agent: Coats & Bennett, PLLC

20070274726 - Cross-connector for optical signals in time-division multiplex technology: The invention relates to a cross-connector for optical time-division multiplexed signals, whose channels are switched by means of optical control pulses. One of the optical time-division multiplexed signals is fed to a respective optical switch that has an optical combiner connected downstream of the switch. A first number of channels... Agent: Siemens Corporation Intellectual Property Department

20070274727 - Communications system and leaky optical fiber: A communications system implementing high-speed, high-quality communication in an oblong communication range such as mobile communication, and a leaky optical fiber preferably used in such communications system are provided. An optical fiber (2) is a GI-type optical fiber having a core structured such that the refractive index at the center... Agent: Rader Fishman & Grauer PLLC

20070274728 - Optical communication system and method using optical channels with pair-wise orthogonal relationship: An optical communication system and method may be configured to operate with optical signals having reduced channel spacing. The system may transmit optical signals on a plurality of optical channels with a pair-wise orthogonal relationship such that a first subset of channels has a first polarization state and a second... Agent: Grossman, Tucker, Perreault & Pfleger, PLLC

20070274729 - Shared high-intensity broadband light source for a wavelength-division multiple access passive optical network: An optical power distributor is coupled to a high-intensity broadband light source to distribute in a shared manner an output of the high-intensity broadband light source to a plurality of optical line terminals. A depolarizer is also described having an input coupled to an output of a polarized broadband light... Agent: Blakely Sokoloff Taylor & Zafman/pdc

20070274730 - Onu and method for converting/combining frequency, and apparatus and method for converting/combining frequency in catv headend system: Provided is an outdoor optical node unit (ONU) and method for converting/combining frequencies, and an apparatus and method for converting/combining frequencies in a cable television headend system. The optical node unit (ONU) includes: a downstream optic-to-electric converting unit for converting a downstream optic signal transferred through an optical cable network... Agent: Lowe Hauptman Ham & Berner, LLP

20070274731 - Method and apparatus for optical phase modulation: A method of phase modulating optical radiation by the steps of phase modulating the optical radiation by using a modulator having an extinction ratio in order to provide a multilevel phase shift key signal, and applying to each optical pulse a phase-shift having an absolute value depending on the extinction... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070274732 - Optical modulation converter and method for converting the modulation format of an optical signal: An optical modulation converter (10) for converting the modulation format of an optical input signal is characterized by a birefringent medium (14), polarization maintaining fibre, with a selected differential group delay between its two main axes of symmetry through which the optical input signal is passed to be separated into... Agent: Coats & Bennett, PLLC

20070274733 - Coherent optical detector and coherent communication system and method: An optical device is provided with first and second inputs. A first coupler coupled is coupled to the first input and produces at least a first and second output. A second coupler is coupled to the second input and produces at least a first and second output. A third coupler... Agent: Celight, Inc.

20070269211 - Multiple port symmetric reflective wavelength-selective mesh node: Reflective WSS-based mesh nodes of degree N (i.e., nodes having N ports, where 3<=N<=6) are connected to provide a multiple wavelength channel signal with reciprocal connectivity between the N node ports. The WSS-based mesh nodes of degrees 3 and 4 are implemented using a reflective 1×K WSS, where K is... Agent: Brosemer, Kolefas & Associates, LLC - (lucent)

20070269210 - Multiple port symmetric transmissive wavelength-selective mesh node: Transmissive WSS-based mesh nodes of degree N, N≧3, includes N node port apparatuses connected to provide a multiple wavelength channel signal with reciprocal connectivity between the N node ports. Each node port apparatus has an input port and N−1 output ports and comprises either (1) a coupler connected to said... Agent: Brosemer, Kolefas & Associates, LLC - (lucent)

20070269212 - Method and apparatus to reduce the impact of raman interference in passive optical networks with rf video overlay: Raman interference (also known as Raman scattering) during an idle frame transmission state in a passive optical network (PON) having radio frequency video overlay is reduced by generating and transmitting data packets having both random data and random length. Randomly varying both the packet data content and the packet length... Agent: Alcatel Lucent Intellectual Property & Standards

20070269215 - Wavelength-division-multiplexing optical transmission system and control method thereof: is satisfied, wherein T denotes a period from the time when a change in the number of multiplexed wavelengths occurs until said constant-gain control starts v denotes output-level-recovery speed of the optical amplifier, Y denotes fluctuation allowance of a receiving unit after wavelength-division-multiplexing transmission, and N is a maximum number... Agent: Bingham Mccutchen LLP

20070269208 - Method for detecting a check-back signal in an optical transmission system: The invention relates to a method for detecting a check-back signal in a transmission system for optical signals. According to said method, a constant proportion of the output in a defined frequency range of the check-back signal is concentrated in a narrow-band spectral range and is determined after a transmission... Agent: Siemens Corporation Intellectual Property Department

20070269209 - Determination of the amplified spontaneous emission in an optical fibre amplifier: In a method for determining a power of an amplified spontaneous emission in an optical fiber amplifier for a WDM signal, wherein the optical fiber amplifier includes at least a first amplifier stage having a predetermined output power set for a measured input power, a first mean inversion is determined... Agent: Siemens Schweiz Ag I-47, Intellectual Property

20070269213 - Single fiber passive optical network wavelength division multiplex overlay: A downstream baseline optical signal generated by a baseline optical link is combined with a second optical signal generated by an additional optical link to generate a broadband optical signal. A fiber optic network splits the broadband optical signal to a plurality of fiber drops. An optical network termination unit... Agent: Baker Botts L.L.P.

20070269214 - Photonic integrated circuit device and elements thereof: A photonic integrated circuit (PIC) device is described. The PIC device includes a set of optical transceivers including optical transmitters and optical receivers, and an embedded optical interconnect mesh operatively associated with the set of optical transceivers and structured to enable at least one of the following network architectures: a... Agent: Doron Handelman

20070269216 - Methods and apparatus for controlling multiple infrared devices: A method and apparatus for controlling a plurality of infrared devices (ICDs) is provided herein. A remote controller is used to generate an optical signal for controlling a plurality of ICDs. The optical signal generated by the remote controller is converted into an electrical signal by an infrared repeater device.... Agent: The Directv Group, Inc. Patent Docket Administration

20070269217 - Multi-data-rate optical transceiver: An optical transceiver module includes an optical-to-electrical converter configured to convert a first optical signal to a first electric signal, a first amplifier configured to amplify the first electric signal, a bandwidth controller coupled to the first amplifier, configured to control the frequency response characteristics of the amplification of the... Agent: Fish & Richardson, PC

20070269218 - Method and system for transparent transport of optical channel transmission unit signals via an optical transport network: The present invention discloses a method and a system for transparent transport of optical channel transmission unit (OTU) signals via an optical transport network (OTN), which includes a transmitting unit and a receiving unit at the OTN network boundary: the transmitting unit converts an OTUj signal mapping entering the OTN... Agent: Townsend And Townsend And Crew, LLP

20070269219 - System and apparatus for optical communications through a semi-opaque material: A light based communication system is provided including at least one phototransmitter which generates an optical signal which is detected by at least one photodetector that is encapsulated in potting material. The phototransmitter is optically coupled to the photodetector through the potting material. The photodetector transforms the optical signal into... Agent: Cook, Alex, Mcfarron, Manzo, Cummings & Mehler Ltd

20070269220 - Photonic integrated circuit device and elements thereof: A photonic integrated circuit (PIC) device is described. The PIC device includes a set of optical transceivers including optical transmitters and optical receivers, and an embedded optical interconnect mesh operatively associated with the set of optical transceivers and structured to enable at least one of the following network architectures: a... Agent: Doron Handelman

20070269221 - Photonic integrated circuit device and elements thereof: A photonic integrated circuit (PIC) device is described. The PIC device includes a set of optical transceivers including optical transmitters and optical receivers, and an embedded optical interconnect mesh operatively associated with the set of optical transceivers and structured to enable at least one of the following network architectures: a... Agent: Doron Handelman

20070269222 - Pilot tone bias control: A method and apparatus for dynamically compensating for phase deviations using two synchronous rectifiers in a quadrature constellation and a delay line.... Agent: Patterson & Sheridan, LLP/ Lucent Technologies, Inc

20070269223 - Optical communication apparatus: An optical communication apparatus for controlling the operating point of an optical modulation unit appropriately. An adding unit adds a bias voltage and a pilot signal. An optical modulation unit modulates light by an electrical signal, performs further modulation by a signal from the adding unit, and outputs an optical... Agent: Staas & Halsey LLP

20070264010 - Self calibrated optical spectrum monitor: An optical spectrum monitor includes a tunable optical detector that receives optical channel monitoring signals from an optical channel and receives a control signal that selects a frequency of an optical channel monitoring signal for detection. The tunable optical detector detects the optical channel monitoring signal selected by the control... Agent: Rauschenbach Patent Law Group, LLC

20070264016 - Method and apparatus for rogue tolerant ranging and detection: A fault condition of a continuous stream of light up a shared fiber from an Optical Network Terminal (ONT) to an Optical Line Terminal (OLT) may adversely affect ranging of the ONT by the OLT. A method and corresponding apparatus for ranging an ONT tolerant to such a fault condition... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20070264017 - Pon system and optical network unit: Provided is an ONU that suppresses transmission of a useless multicast control message to a PON section and enables a communication bandwidth of the PON section to be effectively used. The ONU of the PON system has a multicast group management table that shows a correspondence between a multicast group... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20070264018 - Optical network design method: In the case that a client signal having a bandwidth larger than BW divided by P exists, where the P is the number of client ports of one optical transponder card and the BW is an optical signal band, it is configured to accommodate client signals in one optical transponder... Agent: Staas & Halsey LLP

20070264008 - Method and system for hybrid protection in optical networks: A technique for carrying out protection of data traffic in a multi-channel multi-section optical communications network by simultaneously using Optical Multiplexed Section (OMS) protection and Optical Channel (OCH) protection; the technique comprises selection of a working optical signal in an OCH protected optical channel, in case of a fault in... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

20070264009 - Systems and methods of optical path protection for distributed antenna systems: Systems and methods for optical path protection for distributed antenna systems are provided. In one embodiment, a method is provided. The method comprises receiving an electrical uplink radio frequency signal; generating an uplink optical signal derived from the electrical uplink radio frequency signal; splitting the uplink optical signal for transmission... Agent: Fogg & Powers LLC

20070264011 - Network managing apparatus, optical add/drop multiplexer, and network managing method: A network managing apparatus is connected to one of multiple OADM nodes that execute optical communication on an optical ring network configured by a two-line transmission path including of an active line and a backup line. The apparatus includes a storing unit that stores arrangement information of the OADM nodes... Agent: Bingham Mccutchen LLP

20070264012 - Identifying or locating waveguides: The present invention relates to the location or identification of a waveguide, in particular where a disturbance is applied to the optical waveguide. This is achieved by: (a) monitoring the waveguide at a first location to sense a disturbance along the waveguide; (b) causing a disturbance to the waveguide at... Agent: Nixon & Vanderhye, PC

20070264013 - Optical communication system: An optical transmission equipment in an optical communication system interconnecting two optical transmission equipment sets by a main transmission line and a backup transmission line. An optical amplifier amplifies and outputs optical signals from one transmission line in use, interconnecting the optical transmission equipment concerned with neighboring upstream optical transmission... Agent: Staas & Halsey LLP

20070264014 - Variable gain optical amplifiers: A variable gain optical amplifier comprises an EDFA for amplifying optical signals at different wavelengths and a pump driver 14 for optically pumping the EDFA to provide optical gain. An input detector 2 is provided for monitoring the power Pin of input signals to the EDFA, and an output detector... Agent: Mark D. Saralino (general) Renner, Otto, Boisselle & Sklar, LLP

20070264015 - Uniform switching system and method for synchronous optical network and optical transport network: Embodiments of the invention provide a method and a system for switching an OTN signal using the SDH. The system includes a system clock unit for providing a system clock signal and a frame header indication signal, a cross-connection unit for performing signal cross-connection at a uniform level of synchronous... Agent: Marshall, Gerstein & Borun LLP

20070264019 - Remote controller with narrowed acting angle: An optical signal remote controller with narrowed acting angle having an optical signal emitter and a light guiding element used to narrow the acting angle of the optical signal emitted by the optical signal emitter is provided. The remote controller further includes a modulating apparatus, which move the light guiding... Agent: Rabin & Berdo, PC

20070264021 - High-speed fiber-to-the-premise optical communication system: An optical communication system including a plurality of transceiver ports each including a transmitter configured to produce a downstream MLM-spectrum signal and a receiver configured to receive an upstream spectrum-sliced signal. The spectrum of the downstream MLM-spectrum signal comprises a plurality of distinct narrow-spectrum peaks each corresponding to a longitudinal... Agent: Xin Wen

20070264020 - High-speed fiber-to-the-premise optical communication system: An optical communication system including a plurality of transceiver ports each including a transmitter configured to produce a downstream MLM-spectrum signal and a receiver configured to receive an upstream spectrum-sliced signal. The spectrum of the downstream MLM-spectrum signal comprises a plurality of distinct narrow-spectrum peaks each corresponding to a longitudinal... Agent: Xin Wen

20070264022 - Optical module: In an optical module in which a transmitter and a receiver that respectively outputs and receives optical signals are stored in a casing, the transmitter and the receiver are connected to a common power line and to a common ground line, and a ferrite bead is arranged on the ground... Agent: Staas & Halsey LLP

20070264023 - Free space interchip communications: Micro-resonant structures form a part of an optical interconnect system that allows various integrated circuits to communicate with each other without being connected by signal wires. Substrates have mounted thereon integrated circuits which include at least one optical communications section. Each optical communications section includes at least one transmitter and/or... Agent: Davidson Berquist Jackson & Gowdey LLP

20070264024 - Bi-directional application of a dispersion compensating module in a regional system: A system for the bidirectional application of a dispersion compensating module in a regional system includes a dispersion compensating module configured to receive a first optical signal traveling along a first path and a second optical signal traveling along a second path, wherein the dispersion compensating module provides dispersion compensation... Agent: Clements Walker

20070264026 - Method and apparatus for controlling phase of a clock signal: A method and corresponding apparatus are disclosed for controlling the phase of a second clock signal from (i) a first clock signal of different frequency and (ii) a synchronization signal. One example embodiment recovers a first clock signal from a bus carrying data and detects a synchronization signal. Both the... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20070264025 - Los beat detector: A loss of signal beat detector makes use of multiplication of a local clock signal and a recovered clock signal to obtain frequency deltas used to indicate loss signal. Through a hardware implementation, a high speed detection is offered, allowing changeover from the recovered clocking signal to the local clock... Agent: Borden Ladner Gervais LLP Anne Kinsman

20070264028 - Optical transmitter: In an optical transmitter of the invention, continuous light from a light source is a (CS)RZ-D(Q)PSK modulated by two optical modulators connected in series, and a part of the optical signal output from a post-stage optical modulator is branched by an output monitor section, and the power of a preset... Agent: Bingham Mccutchen LLP

20070264027 - Dispersion compensating circuits for optical transmission system: Improved dispersion compensating circuits for optical transmission systems are disclosed. According to the improved method, there is provided a compensation circuit comprising a varactor diode network. The network is preferably inserted between a source of laser modulating signal and the laser. A low pass filter constructs the network. The network... Agent: General Instrument Corporation Dba The Connected Home Solutions Business Of Motorola, Inc.

20070264029 - Delay interferometer and demodulator: A delay interferometer and a demodulator including the delay interferometer and a balanced photodetector are provided. A half mirror splits an optical signal into first and second split beams of light which travel on first and second optical paths, respectively. A first reflector being disposed on the first optical path... Agent: Sughrue Mion, PLLC

20070264030 - Selectable frequency emr emitter: An optical transmitter produces electromagnetic radiation (e.g., light) of at least one frequency (e.g., at a particular color frequency) by utilizing a resonant structure that is excited by the presence a beam of charged particles (e.g., a beam of electrons) where the electromagnetic radiation is transmitted along a communications medium... Agent: Davidson Berquist Jackson & Gowdey LLP

20070264031 - 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 Lucent Intellectual Property & Standards

20070258713 - Subcarrier multiplexing type optical communication method and passive optical network using the same: Disclosed is a subcarrier multiplexing type optical communication method including the steps of receiving a first optical signal composed of a plurality of subcarrier channels having different frequencies, creating a second optical signal having a wavelength different from a wavelength of a received signal; and detecting the subcarrier channels from... Agent: Cha & Reiter, LLC

20070258714 - Wavelength division multiplexed optical communication system with rapidly-tunable optical filters: The present invention provides a WDM optical system that includes a tunable filter for selecting one or more optical channels from a WDM optical signal. A portion of a WDM signal enters a first optical filter stage that exhibits a periodic transmission spectrum and possesses individually tunable filter elements. A... Agent: North Weber & Baugh LLP Carothers, W. Douglas

20070258715 - Modular, easily configurable and expandible node structure for an optical communications network: A network node structure for an optical communications network has a housing having a plurality of slots, and a plurality of cards inserted in the slots. The plurality of cards includes at least one first card having an optical input for receiving an input WDM optical signal from an optical... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070258716 - System and method for seamless integration of cwdm and dwdm technologies on a fiber optics infrastructure: The present invention provides a system and method for multiplexing DWDM channels on top existing CWDM infrastructure. An erbium-doped fiber amplifier amplifies DWDM signals in the DWDM domain to compensate for 10 G optics power budget limitations without blocking the CWDM signals. A passive WDM infrastructure allows the CWDM and... Agent: Aka Chan LLP / Cisco

20070258717 - Optical device and wavelength conversion method and optical fiber suitable for them: An optical device and wavelength conversion method can selectively perform wavelength conversion of a probe lightwave. An optical fiber is suitable for them. The device 1 comprises (a) a pump light source 12 for outputting a pump lightwave having a wavelength of λpump and (b) an optical fiber 11 that... Agent: Mcdermott Will & Emery LLP

20070258718 - Method and system for extending internet protocol remote control to non-internet protocol devices: A method for controlling an infrared radiation (“IR”) based consumer electronics (“CE”) device with a wireless Internet Protocol (“IP”) based remote control unit, the method comprising: receiving an IP message from the remote control unit through an IP receiver of an IP remote control extender system, the IP message for... Agent: Kramer & Amado, P.C.

20070258719 - Remote unit for adding frequency assignments to a separation-type base transceiver station: The present invention is related to a remote unit in a separation-type BTS, in which desired FA can be distributed and increased without additional changes. The remote unit comprises a main unit, an electro-optical converter for converting a signal transmitted from the main unit and received via an optical cable... Agent: Mcdonnell Boehnen Hulbert & Berghoff LLP

20070258720 - Inter-chip optical communication: A system includes a plurality of chips, at least one of said chips having transmission circuitry constructed and adapted to emit a signal in the form of electro-magnetic radiation (EMR), said transmission circuitry including one or more nano-resonant structures that emit said EMR when exposed to a beam of charged... Agent: Davidson Berquist Jackson & Gowdey LLP

20070258721 - Methods and apparatus for optical networks: A chromatic dispersion compensation system for an optical transmission system incorporates circuitry which determines the length of an optical fiber extending between an output amplifier and an input amplifier. Based on fiber type, the total chromatic dispersion on the fiber is determined. Compensation can then be automatically implemented.... Agent: Welsh & Katz, Ltd

20070258722 - Optical receiver: An optical receiver for enhanced optical power sensitivity for optical signal at 10 Gbps includes an optical package and a supporting electrical circuitry. The optical package includes a semiconductor optical amplifier to pre-amplify the incoming weak signal, a tunable optical filter to suppress the spontaneous noise of the amplifier and... Agent: Macpherson Kwok Chen & Heid LLP

20070253711 - Processing of optical performance data in an optical wavelength division multiplexed communication system: Optical performance measurements are taken in an optical network and displayed in a form that allows an operator to enter fault information related to the measurements, or to automatically generate fault alarms to the operator, based on processing of the measurements. The optical measurements may be individual power measurements taken... Agent: Fitzpatrick Cella Harper & Scinto

20070253712 - Method for designing optical network, optical network, and computer readable medium: An appropriate ring topology is selected by searching network topology information on the basis of given information about client signal paths on a predetermined condition, and a wavelength ring accommodating the client signal paths and having an optimal transmission characteristic is designed on the basis of the selected ring topology.... Agent: Staas & Halsey LLP

20070253713 - Solar blind ultraviolet communication system for unattended ground sensor network: Non line-of-sight ultraviolet communication systems can provide reliable inter-nodal communications for unattended ground sensor networks. This type of system is particularly attractive when non line-of-sight conditions exist between nodes, covert operation is required, and insensitivity to positioning and ground proximity are desired. Light emitting diode technology being developed under the... Agent: Bae Systems Information And Electronic Systems Integration Inc.

20070253714 - Optical communication system for wireless radio signals: A method of transmission of radio signals over all types of graded-index multimode fibre is provided. The method comprises launching optical radiation into the core of the multimode fibre away from the centre of the core so as to strongly excite a subset of the available modes of the multimode... Agent: Goodwin Procter LLP Patent Administrator

20070253716 - Optical wireless transmission system: A light emission section 13, including a light emitting element such as a semiconductor laser, emits a light beam in accordance with communication data. A light reception section 23, including a light receiving element such as a photodiode, receives the light beam emitted by the light emission section 13. According... Agent: Wenderoth, Lind & Ponack L.L.P.

20070253715 - Wireless communication system with high efficiency/high power optical source: An optical communication system is provided which includes an optical signal transmitter which communicates high bandwidth, high power frequencies. The optical signal transmitter includes a high efficiency/high power optical source such as an optical magnetron or a phased array source of electromagnetic radiation, and a modulator element. The modulator element... Agent: Renner Otto Boisselle & Sklar, LLP

20070253717 - Optical elements for waveguide-based optical touch screens: A data input apparatus having at least one transmit element coupled to a source of light of a predetermined wavelength, at least one light receive element and a detection device to detect interruption of beams of the light of said predetermined wavelength extending from said transmit element to said receive... Agent: Miller, Matthias & Hull

20070253718 - Optical add/drop amplification device: In an optical add/drop amplification device (1) arranged between fibre spans (2, 3) in an optical telecommunications system, comprising a first input amplifier (4), a channel add/drop device (7) and an output amplifier (8) connected in a series path, the input amplifier (4) is arranged to produce substantially constant output... Agent: Coats & Bennett, PLLC

20070253719 - Wide dynamic range sensor signal processing method & circuitry for analog and digital information signals: A sensor provides an analog sensor output signal that is first converted by a A/D converter, followed by a digital signal processor having a digital signal output that is converted to an analog signal by way of a D/A converter so as to provide an analog information output signal indicative... Agent: Potomac Patent Group PLLC