Optical communications inventions 12/06

20060291856 - Measuring system comprising an intelligent sensor head and having a reduced power consumption for medium-voltage or high-voltage systems or in mining, and method therefor: Differently designed measuring systems exist of which most contain a central signal processing unit and a number of electrical measuring components, and in which the measured values furnished by the measuring components are optically transmitted over optical wave guides. The aim of the invention is to provide a measuring system... Agent: Kohler Schmid Moebus

20060291857 - Method and apparatus for testing optical network equipment: A method of testing optical network equipment involves plugging a tester device into a standard electrical socket on the optical network equipment to be tested. The tester device communicates with the optical network equipment to be tested via the standard electrical socket, appearing to the optical network equipment as though... Agent: Paul D. Greeley, Esq. Ohlandt, Greeley, Ruggiero & Perle, L.L.P.

20060291859 - Automated optical transport system: An automated optical transport system is provided which provides for automatic discovery of system components, automatic inventory of system components, automatic topology detection, automatic provisioning of channels, and automatic characterization and tuning of system components and fiber. The invention provides automation capability through inclusion of management card capabilities at each... Agent: Woodcock Washburn LLP

20060291858 - Bi-directional compound-wdm fiberoptic system architecture with redundancy protection for transmission of data, voice and video signals: An optical architecture and network is described that includes first and second transceivers coupled by an optical fiber. The first and second transceivers concurrently transmit and receive a plurality of optical signals that propagate in a first direction and at least one optical signal propagating in a second, opposite direction... Agent: Emcore Corporation

20060291860 - Method and system for avoiding amplified spontaneous emission loops in an optical network: Optical communication networks often incorporate fiber rings or fiber mesh topologies for interconnecting its nodes. Both of these topologies can contain closed optical loops at one or more wavelengths within the optical spectrum. In amplified optical systems, the inherent loss of these optical loops is counteracted by the amplifier gain.... Agent: Tropic Networks Inc. Dr. Victoria Donnelly

20060291861 - Wdm pon with interleaver: A WDM PON includes: a CO for transmitting downstream optical signals; a RN for distributing the downstream optical signals received from the CO; and a SUB for receiving the distributed downstream optical signals. The CO includes: BiDis of a first group for outputting data-modulated downstream optical signals of the first... Agent: Cha & Reiter, LLC

20060291862 - Laser light source device, exposure device, and mask inspection device using this laser light source device: A laser light source device 1, comprising M number of laser light sources, of which frequency is shifted from a fundamental frequency by (m−1)·a·Δω, a first laser light source section 2 and a first fiber amplifier section 4 for amplifying these laser lights, a first optical multiplexer 6 for approximately... Agent: Morgan Lewis & Bockius LLP

20060291863 - Method and apparatus for transporting ethernet and radio frequency signals in fiber-optic system: A single wavelength fiber-optic communication system that mixes an Ethernet signal with a radio frequency signal is disclosed. The system includes an Ethernet signal module, a radio frequency signal module, a mixer module and a receiver module. The Ethernet signal module provides an Ethernet signal. The radio frequency signal module... Agent: Troxell Law Office PLLC

20060291864 - Establishment and maintenance of optical links between optical transceiver nodes in free-space optical communications networks: A system and method for establishing and maintaining optical links between optical transceiver nodes in a free space optical communications network is disclosed. The system and method provide a protocol for acquisition of an optical link between transceivers in two adjacent nodes and for re-acquisition should a node be replaced... Agent: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.

20060291865 - Optical network: In this invention, a novel optical network is disclosed, comprising at least one base transceiver and a plurality of premise transceivers wherein the base transceiver transmits data frames and timing frames to all said premise transceivers and wherein each one of said premise transceivers receives said data and timing frames... Agent: Georgios Margaritis

20060291866 - Attenuation and calibration systems and methods for use with a laser detector in an optical communication system: Systems and methods for use with an optical communication beam are disclosed. The system allows the beam of light to operate at an adequate power level that provides a robust optical link while minimizing any safety risk to humans. The system calibrates and controls the gain for an avalanche photodiode... Agent: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.

20060291868 - Optical communications using multiplexed single sideband transmission and heterodyne detection: A transmitter subsystem generates an optical signal which contains multiple subbands of information. The subbands have different polarizations. For example, in one approach, two or more optical transmitters generate optical signals which have different polarizations. An optical combiner optically combines the optical signals into a composite optical signal for transmission... Agent: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.

20060291867 - Optical switch device and optical switching method: In an optical switch device, an optical control pulse is inputted into a nonlinear optical fiber in phase with each optical pulse of signal light which is to be outputted, so that the polarization directions of the optical control pulse and the signal light form a predetermined angle at the... Agent: Staas & Halsey LLP

20060291870 - Signal identification in optical communications networks: Signals in an optical communications network, such as optical channels in an optical WDM network for example, are each identified by at least two low frequency dither tones with which the signal is modulated. The dither tones alternate with a predetermined periodicity to produce a cyclically repeated sequence of dither... Agent: Tropic Networks Inc. Dr. Victoria Donnelly

20060291869 - Transmitter frequency peaking for optical fiber channels: Frequency peaking is used in the transmitter to improve link performance. In one example, frequency peaking improves the PIED or TWDP. The frequency peaking can result in pulse shapes that have more electrical energy in the receiver (and therefore higher received SNR) than uncompensated pulses. In addition, due to the... Agent: Fenwick & West LLP

20060285846 - Wdm system: A WDM system includes a plurality of P to P WDM systems connected for wavelength-multiplexing optical signals of a plurality of wavelengths, transmitting them to a transmission path, transmitting wavelength-division multiplexed light while performing amplification by using optical AMP in the transmission path, and subjecting the wavelength-division multiplexed light to... Agent: Katten Muchin Rosenman LLP

20060285847 - Systems with variable link widths: In some embodiments, a chip includes transmitters and receivers, and control circuitry. The control circuitry to cause some of the transmitters and receivers to be inoperative in response to an estimated activity level being in a first range, while others of the transmitters and receivers remain operative. Other embodiments are... Agent: Blakely Sokoloff Taylor & Zafman

20060285848 - Secure analog communication system using time and wavelength scrambling: Described are a secure communications system and method for transmitting analog signals. The secure communications system includes an analog multiplexer, an analog demultiplexer, a plurality of analog communications channels each at a different wavelength, and a pair of sequence logic modules. Analog signals applied to the analog multiplexer are scrambled... Agent: Guerin & Rodriguez, LLP

20060285849 - Variable dispersion compensator: An optical apparatus is disclosed. After converting the incident light into parallel light by a collimator lens, the parallel light is condensed by a line focus lens and applied to a VIPA plate. The focal length of the line focus lens is longer than the one in the prior art,... Agent: Staas & Halsey LLP

20060285850 - Dynamic strain distributed fiber optic sensor: A distributed fiber optic sensor simultaneously interrogates the sensing fiber with two counter propagating light beams. One beam is set to a constant frequency. The second beam is modified to contain a “comb” of frequencies, with each frequency component in the comb offset by a predetermined amount. Each of the... Agent: Blank Rome LLP

20060285851 - Optical transceivers and methods to reduce interference in optical transceivers: Optical transceivers and methods to reduce interference in optical transceivers are disclosed. A disclosed optical transceiver comprises: a converter; a laser diode driver in communication with the converter; and at least one absorber defining a cavity dimensioned to receive the laser diode driver to reduce electromagnetic interference originating with the... Agent: Hanley, Flight & Zimmerman, LLC

20060285852 - Integrated maximum a posteriori (map) and turbo product coding for optical communications systems: An integrated maximum a posteriori equalization and turbo product coding (IMAP-TPC) system for optical fiber communications systems (OFCS) is provided that uses probabilistic characterization of the electrical current in the presence of inter-symbol interference (ISI) and noise to compensate their effects and improve the bit error rate. In the IMAP-TPC... Agent: Fleshner & Kim, LLP

20060285853 - Optical signal generating circuit and optical transmission line: An optical transmission line allows optical signals to be transmitted with higher stability over longer distances. According to a first aspect, an optical NRZ signal is split in two, one half is presented to a clock extraction circuit, and the other half is presented to an EA modulator. An optical... Agent: Wenderoth, Lind & Ponack, L.L.P.

20060285854 - Clock recovery from an optical signal with dispersion impairments: A method of recovering a clock signal from an optical signal received through an optical communications system. A digital sample stream is processed to generate a dispersion compensated signal. The dispersion compensated signal is then tapped to obtain upper side band and lower side band signals of each received polarization... Agent: Ogilvy Renault LLP

20060285855 - Clock recovery from an optical signal with polarization impairments: A method of recovering a clock signal from an optical signal received through an optical communications system. A digital sample stream is processed to generate a dispersion compensated signal. The dispersion compensated signal is then tapped to obtain upper side band and lower side, band signals of each received polarization... Agent: Ogilvy Renault LLP

20060285856 - Optical transmission system using in-line amplifiers: In a system connecting a transmitter and a receiver using transmission paths and repeaters (in-line amplifiers), red chirping whose α parameter is performed for an optical signal on a transmitting side. Each of the repeaters includes a dispersion-compensator for compensating the amount of dispersion on a preceding transmission path. The... Agent: Staas & Halsey LLP

20060280502 - Optical access network system: An optical access network system having a function of correcting upstream signal waveform distortions occurring in the PON section, wherein a central office side apparatus comprises a main controller to notify each subscriber connection apparatus of a transmission grant period, an equalizer of a tap gain adaptive control type to... Agent: Stanley P. Fisher Reed Smith LLP

20060280503 - Remote controller for a big-horsepower wood-waste collecting machine: A remote controller for a big-horsepower wood-waste collecting machine includes an electromagnetic valve, an IC panel and an infrared remote controller. The electromagnetic valve is set between a main power source and a machine motor for properly controlling to pass or cut off the power. The IC panel is properly... Agent: Troxell Law Office PLLC Suite 1404

20060280504 - Optically coupled integrated circuit layers: In an optoelectronic integrated circuit device comprising a vertical arrangement of integrated circuit layers, an optical signal is coupled between a first integrated circuit layer thereof and a second integrated circuit layer thereof. The optical signal is projected through a superlensing element positioned between the first and second integrated circuit... Agent: Hewlett Packard Company

20060280505 - Temperature compensated dynamic optical tag modulator system and method: A dynamic optical tag system and method that allows for operation over a wide temperature range. A variable wavelength optical source, such as a dual wavelength fiber laser, is generated by combining the outputs from two distributed feedback lasers having separate operating wavelengths using a wavelength division multiplexer (WDM). A... Agent: Townsend And Townsend And Crew, LLP

20060280506 - Clock extracting apparatus: A clock extracting apparatus is provided. In the clock apparatus, two frequency components are made to have an equal magnitude by adjusting a temperature and current applied to an FP LD, and a clock signal is extracted by beating the two frequency components having the equal magnitude. The clock extracting... Agent: Blakely Sokoloff Taylor & Zafman

20060280507 - Method and system for keeping time alignment between optical data modulation and a periodically modulated light source: A method and system is disclosed for making time alignment for a data transmission system. A first reference clock signal is provided to a first multiplexer coupled to a data modulator through a data driver, and a second reference clock signal is provided to a second multiplexer coupled to a... Agent: Howard Chen Preston Gates & Ellis LLP

20060280508 - Optimization of mode selection in a laser resonator: The so-called single-longitudinal mode of operation of a tunable laser beam source requires active control of the band-pass filters mounted in the laser resonator. As a rule, this entails one, or a combination of several filter elements, as for example birefringent filters, as well as etalons. In either case, the... Agent: Chadbourne & Parke, L.L.P.

20060280509 - Cryptographic-key-generation communication system: In a cryptographic key distribution system by the phase modulation using a single photon state or a faint LD light, there is required an interferometer independent on polarization and stabilized against thermal fluctuations in order to make a transmission distance longer. Cryptographic key distribution systems are generally low in cryptographic-key-generating... Agent: Stanley P. Fisher Reed Smith LLP

20060280510 - Optical receiver and optical receiving method corresponding to differential m-phase shift keying system: An optical receiver comprises branching units for branching and supplying the signal lights to be inputted to the first to fourth optical waveguides provided on a substrate, second to third optical waveguides for giving delay time differences corresponding to a symbol of the DMPSK modulated signal, a demodulating unit for... Agent: Bingham Mccutchen LLP

20060280511 - Optical receiver having bias circuit for avalanche photodiode with wide dynamic range: An optical receiver is provided as a device capable of detecting a small optical power with satisfactory accuracy and detecting the optical power in a wide dynamic range. In the optical receiver a bias generator applies a variable voltage to an avalanche photodiode (APD). First and second current sensors generate... Agent: Smith, Gambrell & Russell

20060280512 - Light dispersion filter and optical module: A light dispersion filter is composed of three or more optically transparent layers each having a value equal to the value of the product of the refractive index and thickness of the optically transparent layer and transmitted light, and a plurality of partially reflective layers arranged alternately with the optically... Agent: Foley And Lardner LLP Suite 500

20060275034 - Fully protected broadcast and select all optical network: An all optical network for optical signal traffic provides at least a first ring with at least a first clockwise fiber, a second counter-clockwise fiber and a plurality of network nodes. Each node has at least a WDM transponder that with a line-side transmitter and a client-side receiver in a... Agent: Fish & Richardson, PC

20060275035 - Multiple interconnected broadcast and select optical ring networks with revertible protection switch: Optical communication networks having multiple interconnected optical rings and optical protection switching mechanism to reduce communication delays and improve optical signal-to-noise ratios. Optical ring networks using variable optical attenuators for protection switching are also described.... Agent: Fish & Richardson, PC

20060275036 - Method and apparatus for automatically upgrading passive optical networks (pons): An apparatus automatically maintains bi-directional communication between an optical network unit (ONU) and a central office (CO) in a passive optical network (PON) when the CO changes from a first PON mode to a second PON mode. The apparatus senses a PON mode relating to downstream data flow from the... Agent: Nath & Associates PLLC

20060275037 - Methods and apparatus for multiple signal amplification: An apparatus for multiple signal amplification in a passive optical network, includes a remotely-pumped, single erbium coil positioned intermediate a central office and a split point in the network, wherein both analog and digital signals transmitted within an erbium coil amplification band from the central office and one or more... Agent: Corning Cable Systems LLC

20060275038 - Methods and apparatus for selective signal amplification: A module for use in a passive optical network including a single coil of erbium and a passive optical splitter, whereby digital and analog signals pass through the module from a central office/head end and a subscriber premise, while only the analog signal passes through the single coil of erbium... Agent: Corning Cable Systems LLC

20060275039 - Interference-rejection coding method for an optical wireless communication system and the optical wireless communication system thereof: An interference-rejection coding method for an optical wireless communication system and such an optical wireless communication system are provided. The coding method uses delay modulation, block code techniques and filtering to reduce the low frequency interference from light sources. A plurality of codewords from the block codes are reserved for... Agent: Lin & Associates Intellectual Property

20060275040 - Method and apparatus for the zonal transmission of data using building lighting fixtures: This invention relates to the zonal transmission of data by optical means through the modulation of light from common building light fixtures, including the light output of fluorescent, mercury vapor, and other arc or discharge lamps and fixtures; a system for the reuse of radio frequencies by smart radios, and... Agent: William G. Lane William G. Lane, Inc., PC

20060275041 - Optical transmitter and optical receiver: In an optical transmitter provided with an LED that transmits a transmission bit stream as an optical signal by varying the luminance of visible light to be irradiated according to an input transmission bit stream, plural scramble data streams each having a different mark ratio are stored in a scramble... Agent: Hogan & Hartson L.L.P.

20060275042 - Visibility adjusting method and apparatus of vehicle: According to a visibility adjusting apparatus of a vehicle, an apex T is disposed at a position deviated from a driver and between a position opposed to the driver and a vehicle center position, left and right ridgelines uniformly downwardly inclined from the apex T to the vehicle-width direction are... Agent: Mcdermott Will & Emery LLP

20060275043 - Optical receiver module and optical receiver module system: A relation between a light input power monitor value of an optical transmission signal before passing through a fiber and an input signal amplitude monitor value is recorded in advance in a storage device. Next, actual optical-transmission-waveform is inputted into an optical receiver module, and then comparisons between a light... Agent: Mcdermott Will & Emery LLP