Optical communications inventions 04/07

20070092248 - Highly scalable multi-granular node architecture: Highly Scalable Multi-granular Node Architecture based upon strictly non-blocking waveband switch constructed around cyclic arrayed waveguide grating (AWG) routers. In one implementation, the invention includes a first NxN cyclic arrayed waveguide grating (AWG); a middle stage includes N tuner modules, and a second NxN cyclic AWG for routing information from... Agent: Patterson & Sheridan, LLP/ Lucent Technologies, Inc

20070092249 - System and method for traffic distribution in an optical network: In accordance with the teachings of the present invention, a system and method for traffic distribution in an optical network is provided. In a particular embodiment, a traffic distribution module in a passive optical network (PON), includes a filter configured to receive downstream traffic in a first set of one... Agent: Baker Botts L.L.P.

20070092250 - Distribution components for a wavelength-sharing network: In accordance with the teachings of the present invention, distribution components for a wavelength-sharing network are provided. In a particular embodiment, a distribution node for an optical network includes a first distributor operable to receive a first downstream signal comprising at least traffic in a first wavelength and traffic in... Agent: Baker Botts L.L.P.

20070092253 - Distribution node for a wavelength-sharing network: In accordance with the teachings of the present invention, a distribution node for a wavelength-sharing network is provided. In a particular embodiment, a distribution node for an optical network includes a wavelength router and a power splitter. The wavelength router is operable to receive a downstream signal comprising at least... Agent: Baker Botts L.L.P.

20070092251 - Hybrid passive optical network using shared wavelengths: In accordance with the teachings of the present invention, a hybrid passive optical network using shared wavelengths is provided. In a particular embodiment, a system for communicating optical signals over a network includes an upstream terminal. The upstream terminal includes a signal source operable to transmit a downstream signal comprising... Agent: Baker Botts L.L.P.

20070092255 - System and method for distributing traffic in an optical network: In accordance with the teachings of the present invention, a system and method for distributing traffic in an optical network is provided. In a particular embodiment, an optical network includes an upstream terminal, a distribution node, and a plurality of downstream terminals. The distribution node in the optical network includes... Agent: Baker Botts L.L.P.

20070092254 - System and method for transmitting upstream traffic in an optical network: In accordance with the teachings of the present invention, a system and method for transmitting upstream traffic in an optical network is provided. In a particular embodiment, the method includes transmitting upstream traffic at a first wavelength from a first downstream terminal to a distribution node and transmitting upstream traffic... Agent: Baker Botts L.L.P.

20070092252 - Upgradeable passive optical network: In accordance with the teachings of the present invention, an upgradeable passive optical network is provided. In a particular embodiment, an upgradeable optical network includes an upstream terminal and a distribution node. The upstream terminal is operable to forward a downstream signal comprising traffic in a first wavelength, the traffic... Agent: Baker Botts L.L.P.

20070092256 - Wdm type passive optical network: In a WDM type PON system, each ONU comprises an optical transmitter capable to transmit optical signals with variable wavelengths, an optical signal receiving filter variable its receiving wavelength, and a control unit. An OLT selects in response to a wavelength allocation request from each ONU, a transmitting wavelength and... Agent: Mcdermott Will & Emery LLP

20070092258 - Authentication modes for an optical transceiver module: An optical transceiver module, having the ability to authenticate itself to a host is disclosed. The transceiver comprises a receive signal line for transferring data from the transceiver to the host and a transmit signal line for transferring data from the host to the transceiver in preparation for transmission to... Agent: Workman Nydegger (f/k/a Workman Nydegger & Seeley)

20070092257 - Optical interface for communicating optical transceiver status information: An optoelectronic transceiver includes a laser transmitter, a photodiode receiver, an optical transmitter, and circuitry. The circuitry includes memory, which includes one or more memory arrays for storing information related to the transceiver. The circuitry also includes analog to digital conversion circuitry for receiving a plurality of analog signals from... Agent: Morgan, Lewis & Bockius, LLP.

20070092259 - Polarization compensation in a coherent optical receiver: A method of processing a stream of digital samples of an optical signal received by a coherent optical receiver. The digital sample stream is processed to generate a dispersion compensated sample stream. The dispersion compensated sample stream is then processed to compensate polarization dependent impairments of the optical signal.... Agent: Ogilvy Renault LLP

20070092260 - Efficient data transmission and training of data processing functions: A method of a conveying data through an optical communications system. An optical signal is received through the optical communication system, the optical signal comprising data symbols and SYNC bursts, each SYNC burst having a predetermined symbol sequence. The received optical signal is oversampled to generate a multi-bit sample stream.... Agent: Ogilvy Renault LLP

20070092261 - Bit error rate based system and method for optimizing communication system performance: A system (50) includes a communication path (170) and transmits data on a network (103, 106). A transmitter (101) transmits data on the network and a receiver (112) receives data from the network. A component (102, 114) in the communication path has a transfer characteristic (C1, C2, C3) adjusted in... Agent: Mcandrews Held & Malloy, Ltd

20070092262 - Adaptive optical transmitter for use with externally modulated lasers: An optical transmitter for generating a modulated optical signal for transmission over dispersive fiber optic links in which a broadband radio frequency signal input is applied to first and second RF inputs of an external modulator for modulating the output of a semiconductor laser. The transmitter includes a digital signal... Agent: Christie, Parker & Hale, LLP

20070092263 - Method, apparatus and system for high-speed transmission on fiber optic channel: Multi-carrier modulation fiber optic systems constructed using a series of electrical carriers, modulating the data on the electrical carriers and combining the carriers to form a wideband signal. The wideband signal can then be intensity modulated on a laser and coupled to a fiber optic channel. A receiver may then... Agent: Mcandrews Held & Malloy, Ltd

20070092265 - Multilevel pulse position modulation for efficient fiber optic communication: Decreasing the average transmitted power in an optical fiber communication channel using multilevel amplitude modulation in conjunction with Pulse Position Modulation (PPM). This multilevel PPM method does not entail any tradeoff between decreased power per channel and channel bandwidth, enabling a lower average transmitted power compared to On/Off Keying (OOK)... Agent: King & Spalding LLP

20070092264 - Visible light control apparatus, visible light control circuit, visible light communication apparatus, and visible light control method: There is provided a visible light control apparatus including: a modulation unit (corresponding to a PPM signal generation circuit, a subcarrier generation circuit, and a first AND circuit) that modulates a subcarrier and thereby generates a modulated signal; a visible light control unit (corresponding to a driving circuit) that controls... Agent: Paul J. Esatto, Jr. Scully, Scott, Murphy & Presser

20070092266 - Method and apparatus for controlling bias point of optical transmitter: An optical transmitter includes: a modulating unit that modulates an optical signal based on an electric signal; a first detecting unit that detects a first variation width of a maximum output of the modulated optical signal; a second detecting unit that detects a second variation width of a minimum output... Agent: Staas & Halsey LLP

20070086779 - Optical transmission systems and amplifier control apparatuses and methods: Optical systems of the present invention generally include an optical signal controller disposed along an optical link between two optical nodes. The optical signal controller is configured to provide a monitoring signal from an optical signal passing between the nodes as a plurality of wavelength sub-bands at least one of... Agent: Dickie, Mccamey & Chilcote, P.C. Intellectual Property Department

20070086780 - Optical logic gate based optical router: A switching element capable of being used in an optical processing device includes an optical signal separator operable to separate a multiple wavelength optical signal into one or more optical signal wavelengths. The switching element further includes a plurality of semiconductor optical amplifiers located on a single semiconductor substrate. The... Agent: Baker Botts L.L.P.

20070086781 - Bidirectional wavelength cross connect architectures using wavelength routing elements: Bidirectional wavelength cross connects include a plurality of ports, each configured to receive an input optical signals, each input optical signal having a plurality of spectral bands. At least one of the plurality of ports is disposed to simultaneously transmit an output optical signal having at least one of the... Agent: Townsend And Townsend And Crew, LLP

20070086782 - Optical rotating data transmission device with prism coupler: A device for signal transmission between units that are movable along predetermined tracks comprises at least one light guide for guiding light, and a prism disposed to be movable along the light guide at a short distance from the light guide for coupling light into or out of the light... Agent: Daffer Mcdaniel LLP

20070086783 - Method and apparatus for detecting localized polarization dependent anomalies on optical transmission lines: The position and amount of localized polarization dependent anomalies such as polarization mode dispersion and/or polarization dependent loss may be measured by applying a polarization modulated probe signal to an optical transmission line. The polarization modulated probe signal is returned via optical feedback paths positioned along the line, and is... Agent: Grossman, Tucker, Perreault & Pfleger, PLLC

20070086784 - Method and apparatus for extracting optical clock signal: An apparatus and method for extracting an optical clock signal are provided. The method includes splitting a predetermined polarization component from an input optical signal, selecting frequency components for clock signal extraction from the predetermined polarization component and amplifying the selected frequency components, rotating the amplified frequency components by a... Agent: Ladas & Parry LLP

20070086785 - Frequency scanned array control system: An optical fiber amplifier array and related method, in which high beam quality is achieved by varying the frequency of an input signal applied to all of the fiber amplifiers, to locate a frequency at which the amplifiers produce nearly coherent optical outputs. In spite of statistical variations in length... Agent: Carmen B. Patti & Associates, LLC

20070086786 - Electrical funnel: a novel broadband signal combining method: An electrical signal transformation device configured for emulation of physical, for example, optical, phenomena and/or a mathematical or logical process. The device employs a first plurality, second plurality and third plurality of electrical components each having a first terminal and a second terminal. The first plurality and second plurality of... Agent: Marjama & Bilinski LLP

20070086787 - Apparatus and method to generate carrier suppressed-return to zero optical signal: Provided are an apparatus and a method for generating a CS-RZ optical signal. The apparatus includes: a classifier distributing an input signal into two NRZ (non-return-to-zero) signals with an identical transmission speed; a first signal transformer converting one of the two NRZ signals into a first RZ signal using a... Agent: Ladas & Parry LLP

20070086788 - Optical single sideband modulator: The optical single sideband modulator includes an amplitude modulator and a converter comprising a semiconductor optical amplifier, using the chirp effect to convert an amplitude modulated optical signal into a single sideband signal without a filter for eliminating one of the sidebands.... Agent: Siemens Corporation Intellectual Property Department

20070086789 - Chirp switching circuit and optical transmission system: A chirp switching circuit comprises a Mach-Zehnder modulator having a Y-branched part for branching an incoming optical signal into first and second optical signals and an X-branched part merging the first and second optical signals with each other, the Mach-Zehnder modulator causing phase modulation in the first and second optical... Agent: Staas & Halsey LLP

20070086791 - Light receiver: There is provided a light receiver including a photodiode converting an optical signal into an electrical signal, and a plurality of amplifiers respectively having different gains, each input end of the plurality of amplifiers being connected to one end of the photodiode, and one of the plurality of amplifiers being... Agent: Mcginn Intellectual Property Law Group, PLLC

20070086790 - Optical receiver with matched photodetector capacitance: An optical receiver has a voltage supply, a first node, and a second node. A first input of a differential amplifier is coupled to the first node and a second input of the differential amplifier is coupled to the second node. A photodetector is coupled between the voltage supply and... Agent: Agilent Technologies Inc.

20070086792 - Data receiver with positive feedback: A data communication device adapted to receive a data stream includes positive feedback. The positive feedback allows the data communication device to operate with a bi-stable operating characteristic. Consequently the data communication device exhibits superior rejection of signal input noise and reduced chatter. According to various embodiments, the data communication... Agent: Bergman & Song, LLP

20070081822 - Optical telecommunication system with automatic channel switching: An optical telecommunication system with automatic channel switching is disclosed. The system is provided with two symmetrical fiber channels and two subsystems. Each subsystem is formed by two 2×2 optical switches that are connected to each end of the primary and secondary channels, including an input light source, an optical... Agent: Bacon & Thomas, PLLC

20070081823 - Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source: The present invention relates to a wavelength-tunable light source whose output wavelength can be externally controlled and a wavelength-division multiplexed transmission system using the source. A wavelength-tunable light source in accordance with the present invention is constituted to be able to vary the output wavelength of a Fabry-Perot laser diode,... Agent: Sheridan Ross PC

20070081824 - Optical transceiver module and calibration method thereof: A calibration method of an optical transceiver module includes the steps of receiving an input voltage, detecting an optical signal for generating an input power based on the optical signal, generating a compensating power based on the input voltage, and generating a calibrating power based on the compensating power and... Agent: Birch Stewart Kolasch & Birch

20070081825 - Multimode distance extension: Methods and apparatus for increasing the operational distance of multimode fibers are disclosed. According to one aspect of the present invention, an optical transmitter includes a framer that frames data and a scrambler that scrambles the data after the data is framed. The optical transmitter also includes an encoder that... Agent: Aka Chan LLP / Cisco

20070081826 - Optical demodulating apparatus and method: An optical demodulator and accompanying method(s) that demodulates a DQPSK signal employing a single optical delay interferometer comprising a free-space Michelson interferometer having two optical paths, connected to a 1×2 coupler. Positioned within an arm of the Michelson interferometer is a phase shifter that produces a phase difference of π/2... Agent: Brosemer, Kolefas & Associates, LLC - (lucent)

20070081827 - Optical receiver for regeneration of optical signal: An optical receiver includes: a converting unit that converts an optical signal into an electrical signal; an amplifying unit that amplifies the electrical signal; a regenerating unit that regenerates the amplified electrical signal; a correcting unit that performs correction of an error included in the regenerated electrical signal; a monitoring... Agent: Bingham Mccutchen LLP

20070077064 - Frequency envelope detection method for signal analysis: A signal which varies over time is monitored to determine an alarm condition, where the sample stream of digital values from an A/D converter is divided in to equal length pieces and a Fourier Transform (FT) algorithm is used to transform each piece of the stream into a three dimensional... Agent: Ade & Company Inc.

20070077065 - Method for conveying management information: The invention relates to a method for conveying management information in a WDM system from a number of wavelength converters to a central management unit, wherein a management information signal is superimposed on the WDM signal from the respective wavelength converter. A fraction of the optical signal in the common... Agent: Swidler Berlin Shereff Friedman

20070077066 - Optical wavelength controlling method and a system thereof: An optical wavelength controlling method and a system thereof for an optical wavelength division multiplexing transmission system, wherein a plurality of wavelengths of channels are multiplexed and transmitted by an optical transmitting unit, and the multiplexed wavelengths are divided into the wavelengths of the channels by an optical receiving unit,... Agent: Staas & Halsey LLP

20070077067 - Remote management of central office operations: In one implementation, a system detects that a fiber within a fiber optic cable has failed and automatically causes a location of a faulty portion of the fiber to be identified in response to the detecting. In another implementation, a central office includes a first optical patch panel operably coupled... Agent: Verizon Patent Management Group

20070077068 - Time and wavelength-shifted dynamic bidirectional system: A bidirectional optical network, in which an incoming/downstream modulated optical signal(s) of a particular wavelength may carry content from a headend to a subscriber. An incoming/downstream unmodulated continuous wave optical signal(s) from the headend is time-shifted (i.e., time delayed with respect to just received incoming/downstream optical signal(s)), collected, modulated and... Agent: Macpherson Kwok Chen & Heid LLP

20070077069 - System and method for communicating optical signals upstream and downstream between a data service provider and subscribers: An optical fiber network can include an outdoor bandwidth transforming node that can be positioned in close proximity to the subscribers of an optical fiber network. The outdoor bandwidth transforming node does not require active cooling and heating devices that control the temperature surrounding the bandwidth transforming node. The bandwidth... Agent: King & Spalding LLP

20070077070 - Optical code division multiplexing receiving device and time gate processing method in optical code division multiplexing receiving device: Technology is provided in which, by performing time gate processing using a clock signal with time jitter suppressed, time and intensity fluctuations which in the prior art had been observed in auto-correlated signals after time gate processing are reduced. In a decoder, received optical code division multiplexed signals are divided... Agent: Rabin & Berdo, PC

20070077071 - System for measuring atmospheric turbulence: Equipment and techniques for the accurate estimates of the turbulence profile to improve the performance of adaptive optics systems designed to compensate the degradation effects of turbulence on directed energy systems, in astronomy, and in laser communication systems. The present invention is an optical turbulence profiler. The invention includes a... Agent: Trex Enterprises Corp.

20070077072 - Wavelength division multiplexing apparatus: A transmitting unit of a transponder transmits a signal light having a wavelength which is set according to a control unit to a WDM unit. In this situation, when the wavelength of the signal light is adapted to a pass wavelength of an optical filter to which the signal light... Agent: Staas & Halsey LLP

20070077073 - Optical transmission device for controlling optical level of transmission signal in optical transmission system: An optical transmission device includes: an attenuator that attenuates an optical signal from an adjacent optical transmission device; an optical element that is arranged downstream of the attenuator; a detector that detects a change in a characteristic of a transmission path; and a controller that adjusts, when the change is... Agent: Staas & Halsey LLP