Optical communications inventions 08/07

20070201874 - Vehicle network system for data transmission using wavelength division scheme and data transmission method in system: A vehicle network system including one master device for receiving multimedia data and at least one slave device, which including the master device for generating optical signals assigned to multimedia services according to wavelengths, confirming the multimedia services to be provided to each of the at least one slave device,... Agent: The Farrell Law Firm, P.C.

20070201867 - Method, apparatus, system and computer program product for identifying failing or failed optical network terminal(s) on an optical distribution network: An error in a passive optical network is identified by communicating to an optical network terminal on the passive optical network a request to transmit a response signal at a predetermined power level, receiving the response signal in response to the request, and measuring a power level of the response... Agent: Fitzpatrick Cella Harper & Scinto

20070201868 - Optical module and optical switch: In the optical module, the number of optical components is decreased, so that the costs of the device are reduced, and so that optical loss is reduced. The present device comprises: an optical gate array in which a plurality of optical gate switches each employing a semiconductor optical amplifier element... Agent: Bingham Mccutchen LLP

20070201869 - Optical transmission systems including optical protection systems, apparatuses and methods: Optical transmission systems of the present invention include optical protection systems, apparatuses, and methods that provide increased reliability in the system. The optical system generally includes an optical switch having distinct, cooperating dedicated and shared protection sections. The shared protection sections in a plurality of nodes can be configured to... Agent: Dickie, Mccamey & Chilcote, P.C. Intellectual Property Department

20070201870 - Buffering schemes for optical packet processing: An optical packet processor includes one or more optical packet inputs that receive asynchronous optical packets. An optical packet interconnect directs the optical packets from the different optical packet inputs to different optical packet outputs. The optical packets are buffered either before or after being directed from the inputs to... Agent: Marger Johnson & Mccollom, P.C.

20070201871 - Power level management in optical networks: In an optical communication network, optical communication nodes exchange information detailing power level variations to support management and administration of optical communications. This exchange of information permits nodes to determine aggregate power level variations over light paths to support operations such as selection from available light paths and configuration of... Agent: Baker Botts L.L.P.

20070201872 - Ip triple play over gigabit ethernet passive optical network: A method and system for providing Triple Play services using GE-PON technology on a conventional network system, including coupling VLAN bridging to an optical line termination unit by dedicating a GE-PON logical link for each one of voice, data and video as inputs and outputs of the optical line termination... Agent: Arent Fox PLLC

20070201873 - Wavelength division multiplexed (wdm) ring passive optical network (pon) with route protection for replacement of splitter based passive optical networks: A method and apparatus for low cost upgrading on demand of an optical fiber communication system without installing additional optical fiber and minimal installation of optical circuitry at destination and distribution terminals. The upgraded systems comprise an optical data loop of a plurality of destination terminals and a single intermediate... Agent: Baker Botts L.L.P.

20070201875 - Wavelength division multiplexing optical transmission apparatus, wavelength division multiplexing optical transmission system and wavelength division multiplexing optical transmission method: A wavelength division multiplexing optical transmission apparatus for transmitting wavelength division multiplexing optical signals, the apparatus including a plurality of optical transmitting units outputting optical signals having a different wavelength from each other, a plurality of optical intensity modulating units intensity-modulating the optical signals, and a wavelength multiplexing unit multiplexing... Agent: Sughrue Mion, PLLC

20070201876 - Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied: An optical amplifying apparatus which includes an optical amplifier, an optical attenuator and a controller. The optical amplifier amplifies a light signal having a variable number of channels. The optical attenuator passes the amplified light signal and has a variable light transmissivity. Prior to varying the number of channels in... Agent: Staas & Halsey LLP

20070201877 - Optical data synchronization scheme: Asynchronous optical data is aligned with synchronous convergence points in an optical packet switching system. The convergence points can be any place where data enters an optical packet switching element, buffer stage, switch fabric, etc. The arrival time for data approaching the convergence point is compared with a reference signal... Agent: Marger Johnson & Mccollom, P.C.

20070201878 - Repeater and repeating method: A repeater is disclosed that transmits an optical signal using wave division multiplexing. The repeater includes a demultiplexing unit that separates plural channels contained in the optical signal, an adjusting unit that adjusts at least optical power of each of the channels according to a control signal, a multiplexing unit... Agent: Staas & Halsey LLP

20070201879 - Data-aided multi-symbol phase estimation for optical differential multilevel phase-shift keying signals: A data-aided, multi-symbol phase estimation (MSPE) scheme is described for improving receiver sensitivity in the direct-detection of optical differential multi-level phase-shift keying (ODmPSK) signals including optical differential quadrature phase-shift keying (ODQPSK) signals, ODQPSK signals with amplitude shift keying (ODQPSK+ASK), optical differential 8-level phase-shift keying (OD8PSK) signals with eight phase levels,... Agent: Brosemer, Kolefas & Associates, LLC - (lucent)

20070201880 - High power amplifiers: The specification describes an improved seed laser source for high power MOPA applications. Improvement is obtained by modulating the seed laser with a broadband noise function, for example, a Guassian noise function. A broadband noise function is one in which, in contrast to a sine wave function for example, has... Agent: Law Firm Of Peter V.d. Wilde

20070201881 - Discrete bootstrapping in an optical receiver to prevent signal feedback: An optical receiver assembly that is configured to avoid the introduction of feedback in an electrical signal converted by the assembly is disclosed. In one embodiment, an optical receiver assembly is disclosed, comprising a capacitor, an optical detector provided with a power supply being mounted on a top electrode of... Agent: Workman Nydegger (f/k/a Workman Nydegger & Seeley)

20070196105 - Optical network unit and control method thereof: An optical network unit (ONU) includes an optical receiving module, an energy transforming module, an analog-to-digital transforming module and an adjusting module. The optical receiving module receives an optical power signal. The energy transforming module transforms the optical power signal into a level signal. The analog-to-digital transforming module transforms the... Agent: Birch Stewart Kolasch & Birch

20070196106 - Optical circuit structure for realizing a higher-order node in an optical transmission network: The invention relates to an optical circuit structure for realizing a higher-order node in an optical transmission network with a number N of bidirectional remote ports, wherein an optical receive wavelength division multiplexed signal with a set of optical receive channels can be fed to each remote port and wherein... Agent: The Culbertson Group, P.C.

20070196108 - Ranging method for communication system between optical line terminal and plurality of optical network units: In 1 to N communication based on code division multiplexing, ranging is performed by following the first to ninth steps. First step: all the optical network units are set to standby status. Second step: first and second optical network units are set to transmission enable status. Third step: the phase... Agent: Venable LLP

20070196104 - Optical transceiver with clock for providing maintenance and lifetime information: An optoelectronic device uses microcode to perform an end of life calculation for the optoelectronic device. In particular, the optoelectronic device senses environmental and operational parameters under changing conditions during device operation. The optoelectronic device then calculates the end of life for itself based on one or more of the... Agent: Workman Nydegger (f/k/a Workman Nydegger & Seeley)

20070196107 - Optical switching device: In the present optical switching device, a reference light of a wavelength same as or in the vicinity of a wavelength of a signal light, is given from a wavelength-variable light source via each output side optical circulator to each pertinent output light path, and is propagated through each of... Agent: Bingham Mccutchen LLP

20070196110 - Partial dpsk (pdpsk) transmission systems: An optical receiver includes a demodulator having a delay interferometer comprising an optical input that receives a phase modulated optical signal from a bandwidth limited transmission system. The delay interferometer has a free spectral range that is larger than a symbol rate of the phase modulated optical signal by an... Agent: Rauschenbach Patent Law Group, LLC

20070196109 - Secure optical communication system: A secure optical interferometric communication system and network with multiple access capability where one or more transmitters have an interferometer with phase/Doppler shift difference modulation of spread spectrum type which is used for secure communication with one or more receivers on the optical network where the spread spectrum modulation is... Agent: Nixon & Vanderhye, PC

20070196111 - Optic fiber network communication system with duobinary transceiver: An optic fiber network communication system is described that allows a duobinary transceiver to be coupled with an optical dispersion compensator receiver. In one example an optical dispersion compensator is coupled to an input optical fiber to receive an optical signal and compensate the optical dispersion of the received optical... Agent: Blakely Sokoloff Taylor & Zafman

20070196112 - Power save mode for an optical receiver: According to embodiments of the present invention, an optical receiver detects an optical signal, determines the signal strength, and is placed in a power save mode if the optical signal strength falls below a predetermined level. A microcontroller may instruct a transimpedance amplifier integrated circuit (TIA IC) or other circuitry... Agent: Blakely Sokoloff Taylor & Zafman

20070196113 - Monolithic optically preamplified coherent photoreceiver arrays: An array of coherent phototoreceivers is constructed as an imager. Each photoreceiver comprises a local oscillator, a detector (mixer), an optical preamplifier (amplifier) and an electronic amplifier (TIA). A vertical cavity optical amplifier (VCSOA) is used either as the mixer or the preamplifier. The optical IF signal can be phase-shifted... Agent: Hung Chang Lin

20070189768 - Optical network unit and control method thereof: An optical network unit (ONU) includes an optical receiving module, an energy transforming module and an adjusting module. The optical receiving module receives an optical power signal. The energy transforming module transforms the optical power signal into a level signal. The adjusting module generates a power adjusting signal in accordance... Agent: Birch Stewart Kolasch & Birch

20070189771 - Epon system and method for setting up bandwidth therein: In an Ethernet passive optical network (EPON) system and a method for setting up a bandwidth therein, the EPON system comprises at least one optical network unit (ONU) for transmitting to an optical line termination (OLT) a registration request message containing information about a set second bandwidth when a discovery... Agent: Robert E. Bushnell

20070189772 - Hybrid passive optical network using wireless communication: Provided is a hybrid Passive Optical Network (PON) using a wireless communication. The hybrid PON includes a Central Office (CO) for transmitting downstream optical signals, a Remote Node (RN) for performing wavelength division demultiplexing of the downstream optical signals received from the CO and power-splitting each of the demultiplexed downstream... Agent: Cha & Reiter, LLC

20070189773 - Tdm pon and dynamic bandwidth allocation method thereof: A TDM PON including: an optical line terminal; a remote node including multiple secondary optical distributors connected to multiple optical network units; and the multiple optical network units generating and outputting a corresponding upstream optical signal. Each of the secondary optical distributors splits an upstream optical signal input from one... Agent: Cha & Reiter, LLC

20070189774 - Method and arrangement for reducing spectral hole burning: In one aspect, a WDM signal is assigned to a number of sub-bands with the channel spacing being correspondingly enlarged in each sub-band. The spectral hole burning is hereby essentially reduced, since this effect is restricted to the adjacent channels. The complete WDM signal is first pre-amplified before being divided... Agent: Siemens Corporation Intellectual Property Department

20070189767 - Method for amplifying a time-varying optical signal and optical amplification unit: A method for amplifying a time-varying optical signal comprising the steps of: generating an auxiliary optical signal the amplitude of which is chosen to be complementary to at least the envelope of the amplitude of the optical signal, superimposing the auxiliary optical signal to the optical signal resulting in a... Agent: Sughrue Mion, PLLC

20070189769 - Optical fiber with low second order distortion: An optical fiber system comprising: (i) a dispersion pre-compensator including dispersion compensating fiber DCF characterized by the overall dispersion value DDCF at the operating wavelength λ; and (ii) a passive optical network (PON) including a plurality of transmission paths provided by a plurality of optical fibers, said plurality of transmission... Agent: Corning Incorporated

20070189770 - Point-to-multipoint high data rate delivery systems from optical node in hfc systems over existing and advanced coaxial network: Methods and apparatus are described for transmitting and receiving data. A method includes a process of transferring data over a coaxial network at a bandwidth above 1000 MHz, wherein the process of transferring data transfers the data between an optical node and a plurality of cable modems of a hybrid... Agent: John Bruckner, P.C.

20070189775 - Optical network element for compensating dispersion-related propagation effects: A network element (5) for use in a wavelength division multiplex (WDM) optical transmission system (1). The WDM optical transmission system (1) comprises at least one demultiplexing means (5c) adapted to demultiplex a received WDM signal into constituent wavelength channels carrying tributary signals with at least a first and at... Agent: Sughrue Mion, PLLC

20070189776 - Polarization mitigation technique: A method and apparatus for mitigating the effects of polarization on wavelength determinations is disclosed. An optical source produces light across an optical spectrum, while a polarization element changes the polarization of the light at a first rate. The resulting light is applied to an optical element that produces a... Agent: Patterson & Sheridan, L.L.P.

20070189777 - Optical clock signal extraction device and optical clock signal extraction method: The present invention is an optical clock signal extraction device, comprising first conversion means and second conversion means for enabling to extract an optical clock signal without depending on the polarization direction of an input optical signal. The first conversion means comprises a first optical converter and a continuous wave... Agent: Venable LLP

20070189778 - Bi-directional signal interface using photonic coupler: A signal interface comprises a non-reciprocal device having a first port that accepts a first electrical signal and a second port that accepts a second electrical signal. The non-reciprocal device passes the second electrical signal through the first port without a phase shift and passes the first electrical signal through... Agent: Rauschenbach Patent Law Group, LLC

20070189779 - System and method for transmitting analog signals with a modulating retroreflector and hybrid amplitude and frequency modulation: A system and method for encoding an analog input signal for optical transmission, including driving a voltage controlled oscillator with an analog input signal to produce a frequency modulated electrical signal having a frequency proportional to the amplitude of the input signal, and applying the frequency modulated electrical signal to... Agent: Naval Research Laboratory Associate Counsel (patents)

20070189780 - Fiber-to-the-home (ftth) optical receiver with distributed gain control: A fiber-to-the-home (FTTH) system transmits forward and reverse optical signals, such as video, voice, and data signals, via optical fiber, and includes a plurality of home network units. The home network units include an optical receiver for receiving at least one of the video, voice, and data signals. Included is... Agent: Scientific-atlanta, Inc. Intellectual Property Department

20070183778 - Passive optical network: A passive optical network includes: a central office for generating multiplexed downstream optical signals and receiving an upstream optical signal; a plurality of optical network units for receiving a corresponding downstream optical signal and generating subcarrier channels carrying electrical data of an assigned frequency; and a remote node for photoelectrically... Agent: Cha & Reiter, LLC

20070183779 - System and method for extending reach in a passive optical network: In accordance with the teachings of the present invention, a system and method for extending reach in a passive optical network (PON) is provided. In a particular embodiment, a method for extending reach in a PON includes transmitting traffic at a first wavelength from a transmitter at a first optical... Agent: Baker Botts L.L.P.

20070183776 - Methods and systems for controlling power in a communications network: Methods and systems for controlling power in a communications network are provided. In one embodiment, a method comprises reading a power level of a communication link; and, driving an attenuation control signal based on the power level of the communication link. When the power level is greater than or equal... Agent: Fogg & Powers LLC

20070183777 - Optical switching device for a transparent node of high switching degree adapted to spectral equalization: A device (D) dedicated to optical switching in a switching node (NC) comprises at least one first switching matrix (MC1) and one second switching matrix (MC2) coupled to each other and each comprising i) a first stage including Ni diffusion modules each having a first input and Mi first outputs... Agent: Sughrue Mion, PLLC

20070183780 - Apparatus and method for selecting and passing an optical wavelength from an aggregate optical signal: Apparatus, systems and methods for separating a selected optical signal wavelength component from a plurality of optical signal wavelength components of an aggregate optical signal, and for passing the selected optical signal wavelength component while suppressing the remaining wavelength components are provided. Generally, the apparatus provides an optical signal wavelength... Agent: Sughrue Mion, PLLC

20070183781 - Broad-and inter-band multi-wavelength-reference method and apparatus for wavelength measurement or monitoring systems: A wavelength measurement or monitoring system provides a tunable Fabry-Perot optical filter. At least one known light source is used to calibrate and correlate separate wavelength bands scanned by the tunable Fabry-Perot optical filter. At least one wavelength reference is utilized to calibrate at least one wavelength band of the... Agent: Ishimaru & Zahrt LLP

20070183782 - Systems and methods for underwater optical communication: The systems and methods of the invention provide for improved underwater communication systems. In particular, the systems and methods of the invention provide for improved underwater optical modems including optical transmitters and optical receivers that allow omni-directional transmission and reception of optical signals underwater and having a range of about... Agent: Fish & NeaveIPGroup Ropes & Gray LLP

20070183783 - Netted communication and weapons system for littoral warfare: A system for projecting energy comprising a platform; an arrangement disposed on the platform for generating a laser beam; an unmanned aerial vehicle; and a relay disposed on the vehicle for redirecting the laser beam. In the illustrative embodiment, the platform is a submarine and the laser beam is provided... Agent: Patent Docket Administration Raytheon Systems Company

20070183784 - Multichannel bidirectional optical transceiver: A multichannel bidirectional optical transceiver is disclosed. The transceiver includes an optical fiber transmitting downstream optical signals and receiving upstream optical signals, a plurality of vertical surface light-emitting sources that generate the downstream optical signals and a plurality of vertical surface light-receiving detectors that receive the upstream optical signals. The... Agent: Cha & Reiter, LLC

20070183785 - Measurement method by otdr and terminal station apparatus: In a method for performing OTDR measurement in an optical transmission system including a first terminal station and a second terminal station, OTDR signal light is transmitted from an OTDR provided in the first terminal station to the second terminal station, in which the OTDR signal light is Raman amplified... Agent: Staas & Halsey LLP

20070183786 - Apparatus, method, and program for communication: A communication apparatus is provided. The communication apparatus includes a transmission unit adapted to transmit data via a network, a receiving unit adapted to receive data supplied via the network, an interface unit adapted to supply to-be-transmitted data to the transmission unit and extract particular information from data received by... Agent: Bell, Boyd & Lloyd, LLP

20070183787 - Optical transmission system including dispersion slope compensation: A WDM optical transmission system and method uses slope compensation at the transmit terminal and/or the receive terminal. The system and method may be used with modulation formats with a short pulse width and a broad optical spectrum.... Agent: Grossman, Tucker, Perreault & Pfleger, PLLC

20070183788 - Feed-forward current injection circuits and semiconductor optical amplifier structures for downstream optical signal reuse method: A reflective semiconductor optical amplifier (RSOA) and an operating system based on a downstream optical signal reuse method with feed-forward current injection are provided. The RSOA has two active regions and includes a reflecting plane that reflects an input optical signal; and an optical amplifying semiconductor including a rear portion,... Agent: Ladas & Parry LLP

20070183789 - Multichannel opticalcommunication module and method of producing multichannel opticalcommunication module: A multichannel optical communication module includes: a board, and a signal-converting element having optical-action points aligned with a first pitch to emit and receive signal light. The element performs conversion between an optical signal and an electric signal at each of the optical-action points. The module further includes an optical... Agent: Morgan Lewis & Bockius LLP

20070183790 - Optical transmitter with ea-modulator: The present invention is to provide an optical transmitter that includes an EA-modulator and has a function to monitor the optical output power from the EA-modulator with a simplified and small-sized circuit. The transmitter provides a semiconductor optical device integrating a laser diode with the EA-modulator, a driver, and a... Agent: Venable LLP

20070183791 - Multiformat transmitter: Methods and apparatus for supporting a plurality of modulation formats using a single transmitter are disclosed. According to one aspect of the present invention, a transmitter arrangement that provides a signal to a modulator that creates an optical data stream from the signal includes an encoder and a switching/filtering arrangement.... Agent: Aka Chan LLP / Cisco

20070183792 - Widely tunable, dispersion tolerant transmitter: An optical transmitter comprising: (i) an electrical switch; (ii) a laser array comprising a plurality of tunable laser elements; and (iii) an Optical Spectrum Reshaper (OSR) used to reshape the output pulses from the laser elements in the laser array; wherein the electrical switch takes an input electrical digital signal... Agent: Mark J. Pandiscio Pandiscio & Pandiscio, P.C.

20070183793 - Device and method for detecting received optical power in optical communication network: A device and a method for detecting received optical power in an optical communication network, the device mainly including: an optical splitter for separating a part from an uplink optical signal received by an optical receiver in the optical communication network and transferring the part of optical signal to a... Agent: Wolf Greenfield & Sacks, P.C.

20070177873 - Hybrid passive optical network: Disclosed is a hybrid PON including: a central office, remote terminal and a plurality of optical network units arranged in groups, the central office for outputting downstream optical signals, the remote node for wavelength-division-demultiplexing the downstream optical signals input from the central office, splitting the demultiplexed downstream optical signals, respectively,... Agent: Cha & Reiter, LLC

20070177874 - Optical access network system: An optical access network system capable of transmitting and receiving high-speed signals and which allows the number of subscribers to be increased without increasing the number of wavelengths used is provided. An optical line terminal and an optical network unit are joined via an optical fiber transmitting line, a star... Agent: Venable LLP

20070177875 - Optical transmission network: In an optical transmission network of the present invention, an optical signal output from a CWDM unit is combined on an optical transmission path of a DWDM network via a multiplexing filter arranged on a light output terminal of a DWDM unit adjacent to the CWDM unit. Furthermore, an optical... Agent: Staas & Halsey LLP

20070177871 - Method for transmitting a burst using wavelength separation in optical burst switching system: Provided is a method for transmitting a burst using wavelength separation in an optical burst switching system, in which a plurality of nodes form a mesh network. The method includes the steps of generating, at a current node, a several hop going (SHG) burst arriving at a destination node by... Agent: The Webb Law Firm, P.C.

20070177872 - Digital overlay: A method and apparatus for performing a digital overlay in a passive optical network is disclosed. In one embodiment the method comprises sending one or more Internet Group Management Protocol (IGMP) messages to an optical network unit (ONU) in a passive optical network (PON) using a first physical interface, and... Agent: John Nielsen Randick O'dea & Tooliatos, LLP

20070177876 - Chromatic dispersion monitoring method and chromatic dispersion monitoring apparatus, and optical transmission system: A chromatic dispersion monitoring apparatus according to the present invention comprises: a photodetector which photo-electrically converts an optical signal; a low-pass filter which limits a frequency bandwidth of the photo-electrically converted electrical signal to be within a range set according to a modulation format of the optical signal and a... Agent: Staas & Halsey LLP

20070177877 - Wavelength division multiplex (wdm) transmission system: A low-cost configuration of, and at the same time to control the variable dispersion compensator at a high speed in a variable dispersion compensator for compensating the wavelength dependent accumulated dispersion resulting from the wavelength dependency of the transmission fiber and fixed dispersion compensator in a long-distance high-speed WDM transmission... Agent: Stanley P. Fisher Reed Smith LLP

20070177878 - Dispersion compensating method and dispersion compensating apparatus: A dispersion compensating method for carrying out automatic level control with the use of target output power and an ASE correction value corresponding to the number of wavelengths to multiplex and making output power of a wavelength multiplexed signal constant, comprising the steps of: switching into automatic gain control in... Agent: Staas & Halsey LLP

20070177879 - Host-independent link validation between optical communications modules: Systems and methods for validating a data link between two communication modules, such as optical transceiver modules configured for bidirectional optical communication, are disclosed. In one embodiment a method according to the invention includes a first optical transceiver module transmitting a first validation optical signal to a second optical transceiver... Agent: Workman Nydegger (f/k/a Workman Nydegger & Seeley)

20070177880 - Retromodulation-based data communication: A data communication system comprising a transceiver unit for retromodulated optical communication with at least one of a plurality of retromodulator units, the transceiver unit comprising at least one of a plurality of transceivers, the transceivers transmitting diffused radiant energy at different angles covering a predetermined three-dimensional area, wherein each... Agent: Fleit Kain Gibbons Gutman Bongini & Bianco

20070177881 - Optical communications device and optical communications system: In an optical communications device that generates picture optical signals and optical signals for data communication by wavelength division multiplexing, it is carried out to alter a signal pattern inserted between packet signals of the optical signals for data communication so that a frequency component of a modulation waveform of... Agent: Sughrue Mion, PLLC

20070177882 - Optical transmitter apparatus: An optical DQPSK modulator comprises a pair of phase modulators. Each of the pair of the phase modulators is provided with first and second driving signals. The first and second driving signals are amplified by first and second amplifiers, respectively. An RZ intensity modulator generates an optical RZ-DQPSK signal from... Agent: Staas & Halsey LLP

20070177884 - Optical receiver: There is provided an optical receiver in which, between an optical receiver sub-assembly and a pre-amplifier on a main printed circuit board, two transmission lines on a flexible printed circuit board for connecting an optical receiver module with the main printed circuit board, a balanced-type attenuator circuit composed of four... Agent: Mcdermott Will & Emery LLP

20070177883 - Optical receiver module: A semiconductor chip on which a light receiving element is mounted, a preamplifier for amplifying an output signal from the light receiving element, and an insulating carrier substrate on which the light receiving element is mounted are connected such that the output signal from the light receiving element is input... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20070177885 - Optical receiver: An optical divider divides an optical input signal into a plurality of paths. A plurality of optical-to-electrical converters respectively converts the divided optical input signals into electrical signals. A plurality of discriminators respectively outputs discrimination results by discriminating the electrical signals output from the optical-to-electrical converters based on predetermined treshholds.... Agent: Birch Stewart Kolasch & Birch