Optical communications inventions 06/07

20070147833 - Dynamic wavelength allocation apparatus and method: A wavelength allocation method and apparatus that is capable minimizing the number of wavelength converters is provided. In a dynamic wavelength multiplexing division network structure having a limited maximum transmission distance, an optical path is established to maximally suppress activation of a 3R wavelength converter, thereby maximizing efficiency of the... Agent: Ladas & Parry LLP

20070147834 - Dynamic bandwidth allocation method with punishment mechanism in passive optical network: A dynamic bandwidth allocation method with a punishment mechanism applicable in an Ethernet passive optical network (EPON) is provided. The method utilizes GATE message, report message format, and different data types of a multipoint control protocol (MPCP) to order various queues to make the queues have priority and transmit them... Agent: Workman Nydegger (f/k/a Workman Nydegger & Seeley)

20070147835 - Device and method for controlling optical transmitters in wdm-pon system: A method for controlling optical transmitters in a Wavelength Division Multiplexed (WDM)-Passive Optical Network (PON) system includes the steps of: determining the existence of an upward optical signal to control an optical transmitter provided for each corresponding Optical Node Terminal (ONT) to be turned on/off in an Optical Line Termination... Agent: Cha & Reiter, LLC

20070147836 - Passive optical network maintenance method, an optical network unit, and an optical line terminal: The present disclosure relates to a passive optical network (PON) and provides a method for maintaining the PON, the optical network unit (ONU), and the optical line terminal (OLT) to solve the problem of the ONU being in a constant light emitting state. The method of the present disclosure allows... Agent: Conley Rose, P.C.

20070147837 - Method of increasing number of subscribers using time division duplexing technology in wavelength division multiplexing/ethernet passive optical network system: Provided is a method of increasing the number of subscribers using a time division duplexing (TDD) technology in a wavelength division multiplexing (WDM)/Ethernet passive optical network (WE-PON) system, and more particularly, a method of increasing the number of subscribers admissible per wavelength using a TDD technology. In an existing WE-PON,... Agent: Blakely Sokoloff Taylor & Zafman

20070147838 - Optical transmission apparatus and optical access network for wavelength-division multiplexing optical network with both sub-carrier multiplex and sub-carrier multiple access schemes: Provided are an optical transmission apparatus and an optical access network for a wavelength-division multiplexing optical network with sub-carrier multiplex and sub-carrier multiple access schemes. The optical transmission apparatus includes: a multiplexer and/or demultiplexer demultiplexing M forward A band optical signals having wavelengths each comprising a plurality of sub-carriers and... Agent: Blakely Sokoloff Taylor & Zafman

20070147839 - Clock strobed data over one waveguide or fiber: In some embodiments, clock strobed data over one waveguide or fiber is presented. In this regard, a transfer agent is introduced to convert one or more lanes of data and a corresponding clock strobe from electrical signals to optical signals of differing wavelengths. Other embodiments are also disclosed and claimed.... Agent: Blakely Sokoloff Taylor & Zafman

20070147840 - Variable dispersion compensator: The present invention provides: (1) a compensator that compensates a wide range of amount of dispersion of light in a wide bandwidth band; and (2) a variable dispersion slope compensator applicable to the case where a transmission path suitable for a wavelength division multiplexing transmission system produces a wavelength dispersion... Agent: Reed Smith LLP

20070147841 - Optical add/drop device: Optical add/drop nodes are used in a network having a pair of optical transmission paths for transmitting optical signals in opposite directions to each other. Each add/drop node comprises a variable split ratio optical coupler for splitting an optical signal output from a transmitter. The split ratio of the variable... Agent: Staas & Halsey LLP

20070147843 - Apparatus, system, method, and program for visible light communication: A visible light communication apparatus enables an operator to visually recognize a communication state during visual light communication. The apparatus includes a light emitting section which emits visible light and which includes a modulator, a visible light emitter, a light emitting element and an emission control section which includes a... Agent: Ostrolenk Faber Gerb & Soffen

20070147842 - Method and apparatus for coupling spatial light modulators: A method and apparatus for waveguide-based and free space based optical interconnection in integrated circuits that includes an input optical waveguide with etched end-facets, an output optical waveguide with an end-facets and modulators and detectors.... Agent: Connolly Bove Lodge & Hutz LLP

20070147844 - Bi-directional, full-duplex, one-wire communications link for use in fiber optic transceivers: An apparatus is provided that is capable of achieving bidirectional, full-duplex communication with an optical transceiver. In some instances, the communication is achieved over a single electrical connection of the transceiver and via the use of a duplexing circuit on the transceiver and a complementary duplexing circuit on a distal... Agent: Wildman Harrold Allen & Dixon LLP And The Boeing Company

20070147845 - Bi-directional parallel optical link: A system is disclosed. The system includes a first optical transceiver having a first set of transmitters and a first set of receivers and a second optical transceiver having a second set of transmitters coupled anti-symmetrically to the first set of receivers of the first optical transceiver and a second... Agent: Blakely Sokoloff Taylor & Zafman

20070147846 - Bi-directional parallel optical link: An optical communications device has light transmitters of a first wavelength that are coupled to a number of first waveguides of an optical data link, respectively. A second set of light transmitters of a second, different wavelength are coupled to another set of waveguides of the link, respectively. The light... Agent: Intel/blakely

20070147847 - Method and apparatus for transmitting a signal using a chirp managed laser (cml) and an optical spectrum reshaper (osr) before an optical receiver: A method for transmitting a signal and a fiber optic system comprising: a frequency modulated source; an optical transmission fiber positioned to receive the output of the frequency modulated source; an optical filter positioned to receive the output of the optical transmission fiber; and an optical receiver positioned to receive... Agent: Mark J. Pandiscio Pandiscio & Pandiscio, P.C.

20070147848 - Method and apparatus for reducing clipping in an optical transmitter by phase decorrelation: A method and apparatus is provided for reducing clipping arising in an optical transmitter. The method begins by generating a frequency multiplexed sub-carrier signal onto which information is modulated at a plurality of different sub-carrier frequencies. The method continues by decorrelating in phase at least some pulses that are formed... Agent: General Instrument Corporation Dba The Connected Home Solutions Business Of Motorola, Inc.

20070147849 - Channel-length modulation (clm) compensation method and apparatus: A power supply generates a supply voltage that varies from a first voltage level to a second voltage level. A first current source is coupled to the power supply and generates a current that varies due to channel-length modulation. A channel-length modulation (CLM) compensation mechanism is provided to reduce the... Agent: Agilent Technologies Inc.

20070147850 - Digital compensation for optical transmission system: A receiver for an optical transmission system, has a polarization diverse and phase diverse coherent optical receiver, and a digital adaptive equalizer for compensating for distortions in the optical signal introduced by the optical path. The entire field of the optical signal is mapped including phase and polarization information, to... Agent: Barnes & Thornburg LLP

20070140688 - Method and apparatus for detecting a fault on an optical fiber: The mode of operation in which a port is configured to operate may be selected so that the manner in which the port will interpret a loss of signal on a receive fiber may be specified. In an immediate mode, the port will interpret a loss of signal on a... Agent: John C. Gorecki, Esq.

20070140689 - Method and system for passive optical network diagnostics: A method and system for identifying faults in a passive optical network (PON), The method comprises acquiring at an optical network terminal of the PON at least one parameter indicative of at least one malfunction in at least one optical network unit of the PON, and identifying each malfunction from... Agent: Dr. Mark M. Friedman C/o Bill Polkinghorn - Discovery Dispatch

20070140690 - Integrated memory mapped controller circuit for fiber optics transceiver: Circuitry for monitoring an optoelectronic device includes memory, including one or more memory arrays for storing information related to the optoelectronic device and analog to digital conversion circuitry for: receiving a plurality of analog signals from the optoelectronic device; converting the received analog signals into digital values; and storing the... Agent: Morgan, Lewis & Bockius, LLP.

20070140691 - Passive optical network user terminal and method of power supply control and power supply state reporting for the same: The present disclosure discloses a passive optical network (PON) user terminal comprising a passive optical network interface unit (PONIU) having access to a PON system, a service data distribution unit (SDDU) connected to the PONIU for distributing service data, a plurality of service processing units (SPUs) for receiving and accordingly... Agent: Conley Rose, P.C.

20070140692 - Method and apparatus device for initializing an end-to-end link in a fiber optic communications system: A method and apparatus for initializing an end-to-end link in a fiber optic communications system in which a pair of nodes interconnect a pair of end devices. A first node, upon initializing a device link segment with an end device to which the node is coupled, sends a signal to... Agent: William A. Kinnaman, Jr. IBM Corporation

20070140693 - Fiber-to-the-premise optical communication system: An optical communication system includes a first wavelength filter, a bidirectional amplifier, and a second wavelength filter. The first wavelength filter can receive a downstream broad-spectrum signal and output a downstream spectrum-sliced signal in response to the downstream broad-spectrum signal. The bidirectional amplifier can amplify the downstream spectrum-sliced signal. The... Agent: Xin Wen

20070140694 - Burst data reception method and apparatus in epon: A method and apparatus for receiving burst data in an OLT of an EPON are provided. The method includes the steps of: a) receiving burst data from the plurality of ONUs; b) generating a multipoint control protocol (MPCP) LOS signal for reducing a synch time of the burst data; c)... Agent: Ladas & Parry LLP

20070140695 - Demodulator: A demodulator includes: a Michelson interferometer having: a half-mirror which splits an optical signal, emits a first split light to a first optical path, and emits a second split light to a second optical path; a first reflector which reflects the first split light to the half-mirror; and a second... Agent: Sughrue-265550

20070140696 - Open fiber control and loss of light propagation in time division multiplexed inter-system channel link: A method and apparatus for transmitting signals from a plurality of input channels over a TDM optical network, where each of the input channels contains an optical data signal and an electrical control signal containing control information relating to the optical data signal. In accordance with the invention, respective optical... Agent: William A. Kinnaman, Jr. IBM Corporation

20070140697 - Remote control device: A remote control device capable of controlling a plurality of apparatuses is provided. The remote control device includes an external slit portion, an internal slit portion, a light receiving element, and a control circuit. The external slit portion and internal slit portion are arranged such that a prolonged line of... Agent: Osha Liang L.L.P.

20070140698 - Radio frequency signal device biasing circuit: A circuit including a pair of radio frequency signal devices to each of which are connected in parallel a respective input or output and a respective dc bias input device for biasing the respective radio frequency signal device; each dc bias input device including a radio frequency transistor and at... Agent: Sughrue Mion, PLLC

20070140699 - Radio-over-fiber link device using multi-mode fiber and method of setting signal band thereof: Disclosed is a method of setting a signal band of a Radio-Over-Fiber (ROF) link device using a Multi-Mode Fiber (MMF), which includes the steps of dividing a preset band of the entire frequency band of the MMF as a plurality of frequency slots to preset a transmission band in a... Agent: Cha & Reiter, LLC

20070140700 - Method and system for compensating for optical dispersion in an optical signal: A method for compensating for optical dispersion in an optical signal includes receiving an optical signal comprising a plurality of channels. The information being communicated in a first set of channels is modulated using a first modulation technique, and the information being communicated in a second set of channels is... Agent: Baker Botts L.L.P.

20070140701 - Optical signal polarisation control method and controller device: A polarisation control method includes the steps of feeding an optical input signal to a first polarisation transformation block for providing a corresponding first optical output signal; feeding the first optical output signal to a second for providing a corresponding second output signal; providing to the blocks, regulating signals which... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070140702 - Method and system for providing timing recovery in an optical system: The invention regards a new threshold crossing timing recovery scheme for use in high capacity optical disc systems. The timing error of a timing error detector is multiplied with a weighing function. This scheme effectively increases the robustness of the optical system against data-induced jitter, which is considered to be... Agent: Philips Intellectual Property & Standards

20070140703 - Electrical compensation of optical impairments: Optical impairments such as dispersion and fibre nonlinearity are compensated by generating a pre-distorted electrical signal at the transmitter. This signal is modulated onto a carrier signal, so that it is upconverted in frequency. This up converted signal is then used to modulate an optical source. Generally the optical signal... Agent: Barnes & Thornburg LLP

20070140704 - Optical transmitter with enhanced sbs threshold power capability: An optical transmitter (8) having enhanced stimulated Brillouin scattering (SBS) threshold power (PSBS) capability is disclosed. The transmitter includes a light source (12) adapted to emit a continuous-wave (CW) light beam (16). A phase modulator (20) is optically coupled to the light source and to a plurality n of radio-frequency... Agent: Corning Incorporated

20070140705 - Method and apparatus for pulse generation and adaptive pulse generation for optical communications: One embodiment of the invention relates to producing optical pulses for use on a transmission link. A light source is configured to produce an optical signal. A pulse generator is coupled to the light source. The pulse generator is configured to receive, for a first channel, the optical signal and... Agent: Celight, Inc.

20070140706 - Optimum sample spacing in over-sampled maximum likelihood sequence estimation receivers: In an over-sampled maximum-likelihood sequence estimation (MLSE) receiver system, the optimal sample spacing is determined for a variety of conditions. In an illustrative implementation, the system includes an optical filter for tightly filtering an incoming optical data signal with an on-off-keying (OOK) non-return-to-zero (NRZ) format, followed by an optical-to-electrical converter,... Agent: Brosemer, Kolefas & Associates, LLC - (lucent)

20070133984 - Automated acquisition of spectral data and image data: A system and method to automatically obtain spectra for samples. The method involves a two phase process including a photobleaching phase and a spectral acquisition phase. In the photobleaching phase, a series of spectral data sets of a sample are collected. A relative difference is determined between the background of... Agent: Daniel H. Golub

20070133985 - Dynamic wavelength allocation device using 3r wavelength converter having limited wavelength conversion range and method thereof: In a wavelength allocation method in a wavelength division multiplexing network, a 3R wavelength converter having a limited wavelength conversion range is disposed according to a wavelength conversion band of each node, at least one path set between transmitting/receiving nodes is selected, routing paths corresponding to the number of the... Agent: Ladas & Parry LLP

20070133986 - Physical coding sublayer apparatus and ethernet layer architecture for network-based tunable wavelength passive optical network system: Provided are a physical coding sublayer (PCS) apparatus and an Ethernet layer architecture for a network-based tunable-wavelength passive optical network (T-PON) system employing an Ethernet communications technology, and more particularly, to a PCS apparatus and an Ethernet layer architecture for supporting a series of initialization function of allocating wavelengths between... Agent: Ladas & Parry LLP

20070133987 - Triplexer transceiver using parallel signal detection: An optical triplexer transceiver that utilizes parallel signal detection for use in broadband passive optical networks (B-PONs). The triplexer transceiver includes an optical filter comprising a first port coupled to a laser for receiving upstream optical data signals, a second port for passing the upstream optical data signals to a... Agent: Nec Laboratories America, Inc.

20070133988 - Gpon system and method for bandwidth allocation in gpon system: In a gigabit-capable passive optical network (GPON) and a method for bandwidth allocation in the GPON system, when an optical network unit (ONU) requests a bandwidth less than its preset minimum bandwidth, the requested bandwidth is allocated to the ONU. When there are traffic-container (T-CONT) classes of ONUs not allocated... Agent: Robert E. Bushnell

20070133989 - Gpon system and method for bandwidth allocation in gpon system: In a gigabit-capable passive optical network (GPON) system and in a method for bandwidth allocation in a passive optical network (PON) system, a minimum bandwidth is allocated to optical network units (ONUs) for minimal transmission assurance dependent on a traffic characteristic of each ONU, and when there is a traffic-container... Agent: Robert E. Bushnell

20070133990 - Reflective semiconductor optical amplifier (rsoa), rsoa module having the same, and passive optical network using the same: A Reflective Semiconductor Optical Amplifier (RSOA) for compensating for light loss in an optical link, an RSOA module for improving polarization dependency using the RSOA, and a Passive Optical Network (PON) for increasing economical efficiency and practical use of a bandwidth using the RSOA are provided. The PON includes a... Agent: Ladas & Parry LLP

20070133991 - Encoder/decoder for ocdma and method thereof: Provided are an encoder and/or decoder for an OCDMA (optical code division multiple access) and a method thereof. The encoder and/or decoder includes: a demultiplexer outputting multi-wavelength optical signals through paths varying with a wavelength using a plurality of first fused couplers having different coupling coefficients; and a multiplexer selecting... Agent: Blakely Sokoloff Taylor & Zafman

20070133992 - Optical add/drop multiplexer, control method therefor and control program therefor: The present invention provides an optical add/drop multiplexer including an optical power control unit for performing a control of an optical power by the unit of each signal light included in the wavelength multiplexed light, wherein the optical power control unit includes control logic for implementing a first control mode... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20070133993 - 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.

20070133994 - Automatic frequency hopping remote controller: An automatic frequency hopping remote controller automatically switches its channel when the transmission of a remote control signal is interfered. The remote controller includes a transmitting end and a corresponding receiving end; the transmitting end includes a first signal transceiver capable of transmitting signals through several channels and an input... Agent: Hdsl

20070133995 - Remote access unit and radio-over-fiber network using same: A remote access unit (RAU) apparatus, coupled to a central station (CS) of an RoF network through at least one optical fiber, and which RAU apparatus includes at least one antenna, includes: first and second antenna ports coupled to the at least one antenna; first and second optical fiber ports... Agent: Cha & Reiter, LLC

20070133996 - Transmitter: A transmitter transmits digital terrestrial wave information related to a digital terrestrial broadcast by using a communication system of Wave Division Multiplexing (WDM). The transmitter calculates a synchronizing difference, which is a difference between a reference signal and a synchronizing signal synchronizing with the lead of each image picture contained... Agent: Bingham Mccutchen LLP

20070133997 - Effective control algorithm for optical polarization mode dispersion compensators: The present invention includes apparatus and method of a variable step size dithering control algorithm for polarization mode dispersion controllers (PMDCs). The dithering step size of the PCs is adjusted according to the feedback signal including degree of polarization (DOP).... Agent: Patterson & Sheridan, LLP/ Lucent Technologies, Inc

20070133999 - Low emission signal generator and distribution system: A low emission signal manipulating circuit for reducing emission of a given signal. This is accomplished by manupulating the signal and recovering the original signal. The inventive device includes a transmitter which modifies a given signal, a divider that resides in transmitter which divides the incoming signal, a pulse shaping... Agent: Gokalp Bayramoglu

20070133998 - Network with sourceless clients: A first node receives a first phase modulated optical signal at a first wavelength from a master node. The first node also transmits a first amplitude modulated optical signal to the master node at the first wavelength using a portion of the first phase modulated optical signal as a light... Agent: Verizon Patent Management Group

20070134002 - Passive mode-locked semiconductor laser diode, and optical clock signal extracting device: To provide an optical clock signal extracting device with a simple configuration, by which an optical clock signal may be extracted without depending on the polarization direction of an input optical signal. A current is injected to a gain region 30 through an n-type common electrode 12 and a p-type... Agent: Venable LLP

20070134000 - Polarization division multiplexed optical transmission system: Provided is a polarization division multiplexed optical transmission system including a transmitter and a receiver. The transmitter includes a first light source generating an optical signal having a linear polarization state; a second light source generating an optical signal having a horizontal polarization state; a first signal generator receiving a... Agent: Mayer, Brown, Rowe & Maw LLP

20070134001 - Polarization division multiplexed optical transmission system: Provided is a polarization division multiplexed optical transmission system including a transmitter and a receiver. The transmitter includes a first light source generating an optical signal having a linear polarization state; a second light source generating an optical signal having a horizontal polarization state; a first signal generator receiving a... Agent: Mayer, Brown, Rowe & Maw LLP

20070134003 - Optical transceiver case: An optical transceiver case is provided. The optical transceiver case has an optical transmission/reception device and a PCB that operates the optical transmission/reception device. The optical transceiver case includes a lower plate and an upper plate. The lower plate supports the optical transmission/reception device and the printed circuit board, and... Agent: Ladas & Parry LLP

20070134004 - Optical modulating circuit and optical modulating method: An optical modulating circuit realizing a PPM is constituted by circuit parts having a frequency band equal to a data rate to provide a technique which increase the data rate. A first light source generates a first single wavelength signal serving as a continuous light having a first wavelength λ1... Agent: Venable LLP

20070134005 - Apparatus and method for generating return-to-zero signal: Provided are an apparatus and a method for generating a return-to-zero (RZ) signal, including: a first modulator receiving a first signal having a predetermined frequency to modulate, compensate for and output a first laser beam; a second modulator receiving a second signal complementary to the first signal to modulate, compensate... Agent: Blakely Sokoloff Taylor & Zafman

20070134006 - Method for adjusting bias in optical transmitter with external modulator: A method for operating an optical transmitter for transmission of an optical signal over a dispersive fiber optic media to a remote receiver. The method includes the steps of providing a respective bias level of a first RF signal and a second RF signal input to an optical modulator that... Agent: Casey Toohey Emcore Corporation

20070127917 - Node device, optical communication network, optical path reserve method and computer-readable medium comprising a program: The present invention suppresses an increase of processing time caused by the expansion of network scale, and decreases the probability of occurrence of blocking by reserving optical paths based on the distributed control method, and decreases time to complete the reservation of optical paths. When an optical path is set... Agent: Venable LLP

20070127918 - Fault sensor for a laser driver circuit: An apparatus and method is provided for sensing which faults have occurred in a laser control system, as well as trapping and identifying the first fault occurrence. The apparatus includes an integrated circuit in which a mask register is set by means of a micro-controller or a host system to... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist P.A.

20070127920 - Method and system for speed negotiation for twisted pair links in fibre channel systems: Certain aspects of a method and system for speed negotiation for twisted pair links in fibre channel systems are disclosed. Aspects of a method may include communicating data between fibre channel host devices communicatively coupled via a twisted pair link based on a common speed negotiated between the fibre channel... Agent: Mcandrews Held & Malloy, Ltd

20070127919 - Temperature compensation for transmission between nodes coupled by a unidirectional fiber ring: Transmissions over a unidirectional optical fiber coupling multiple nodes are compensated for temperature-induced effects. A round-trip delay time is determined for a signal sent from a first node to travel around the unidirectional optical fiber loop and be received back at the first node. That measured round-trip delay time is... Agent: Ericsson Inc.

20070127921 - Average time extraction by multiplication: A method involving: in a signal distribution system including a first line and a second line both of which extend from the first end to the second end of the signal distribution system, introducing a first global clock signal into the first line so that the first global clock signal... Agent: Wilmer Cutler Pickering Hale And Dorr LLP

20070127922 - Eliminating clock skew by using bidirectional signaling: A clock signal distribution circuit including: a signal transmission system having first and second signal transmission lines, each extending from the first end to the second end of the signal transmission system, the first signal transmission line for carrying a first periodic signal from the first end to the second... Agent: Wilmer Cutler Pickering Hale And Dorr LLP

20070127923 - Adaptive preamble adjustment for burst-mode optical systems: In an optical data network, such as a passive optical network (PON), an optical line terminator (OLT) measures the strengths of one or more signals received from the optical network units (ONUs) and generates a message containing an indication responsive to the measured signal strength. The OLT transmits the message... Agent: Alcatel Usa Intellectual Property Department

20070127924 - Wavelength service providing apparatus in all-optical network: An optical signal is transmitted via a WDM device 4 including a transponder 13, an all-optical node 1, and a wavelength multiplexing and demultiplexing optical filter 38. A route and wavelength selecting functional part 32 transmits a band varying request and a wavelength varying request to the transponder 13 based... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20070127925 - Optical disk player: When an optical disk player is switched on, a main controller 15 firstly obtains information of audio channels that an appliance connected to the optical disc player supports through an HDMI cable (step #1). Then, when a command for starting reproduction of the optical disc is inputted through the remote... Agent: Crowell & Moring LLP Intellectual Property Group

20070127927 - Communication optical system and free-space optics communication apparatus: A communication optical system in accordance with an aspect comprises a light source; a light-receiving element; a first and a second prisms, which are cemented to each other; and a beam-splitting member, which performs one of transmission and reflection towards an incident and emergent port, of a first light beam... Agent: Morgan & Finnegan, LLP

20070127926 - Free space optical conditioner: An optical communications terminal, comprising: an optical telescope (e.g. a dual mirror Ritchie-Chretien telescope); a transmitter unit including at least one transmitter coupled to source of optical signals; a receiver unit for receiving optical signals; an optical system defining a transmit optical path between the optical telescope and the transmitter... Agent: NeifeldIPLaw, PC

20070127928 - Large field of view modulating retro reflector (mrr) for free space optical communication: A modulating retro-reflector (MRR) can be configured to provide a large field of view. The MRR can include a solid corner cube reflector (CCR) manufactured of a material having a high index of refraction at the desired operating wavelength. CCRs made from high index materials such as InP or Si,... Agent: Townsend And Townsend And Crew, LLP

20070127929 - Signal regeneration device, optical receiver, and signal processing method: A signal regeneration device which makes an extracted clock signal highly accurate while maintaining superior receiving sensitivity. To this end, a device of the present invention is configured to have a branch section for branching an input electrical signal which has been demodulated from a differential phase-shift modulated state; a... Agent: Edward A. Pennington Bingham Mccutchen LLP

20070127930 - Skew correction system eliminating phase ambiguity by using reference multiplication: A system for generating a local clock signal, the system including: a skew correction circuit for receiving first and second periodic signals that have associated skews, wherein the skew correction circuit is configured to use the received first and second periodic signals to generate a third periodic signal that has... Agent: Wilmer Cutler Pickering Hale And Dorr LLP

20070127931 - Optical transceiver module: Disclosed is an optical transceiver module for modulating a binary signal into an optical signal and outputting the optical signal. In one aspect, the optical transceiver module comprises a tap for dividing a binary signal into first and second binary signals, a laser source for frequency-modulating the first binary signal... Agent: Cha & Reiter, LLC

20070127932 - Method, system and apparatus for optical phase modulation based on frequency shift: The present invention provides an optical phase modulation method using optical frequency shift devices. By accurately controlling the frequency shift, the phase delay experienced by the light signal through an optical medium (fibre, free space, vacuum, or other) can be controlled with high resolution. Hence, phase change can be achieved... Agent: Miller Thompson, LLP

20070127933 - Optical dqpsk receiver apparatus: A first interferometer comprises a first delay element and a first phase shift element, and a second interferometer comprises a second delay element and a second phase shift element. The amounts of phase shift in the first and second phase shift element are zero and π/2, respectively. A first photo... Agent: Bingham Mccutchen LLP