Optical communications inventions 02/08

20080050114 - Method of determining an optimum path in an optical telecommunications network: This invention concerns the field of telecommunication networks using optical fibres. The invention relates to a method of determining a connection path between two points in an optical network comprising several paths to connect said two points, each path comprising optical fibre spans and power amplifiers, said method comprising different... Agent: Sughrue Mion, PLLC

20080050116 - Station-side optical network terminal apparatus, subscriber-side optical network terminal apparatus, and optical communication system: While continuously providing a service in an existing optical communication system, a service at another communication speed is realized at low cost. For this reason, a station-side optical network terminal apparatus is configured so that to one light-emitting unit connected are a first processing unit that performs a process to... Agent: Young & Thompson

20080050119 - Method and system for random channel assignment in wdm based passive optical networks: A wavelength division multiplexing based passive optical network is disclosed. The network includes an optical line terminal; a power optical splitter connecting to the optical line terminal by an optical fiber; and several optical network units. Each of the optical network units connects to the power optical splitter by each... Agent: Akin Gump Strauss Hauer & Feld, LLP

20080050113 - Electrical overstress event indicator on electronic circuitry: Detecting electrical overstress events in electronic circuitry such as optical emitters. In one example embodiment, a laser includes an active area and a contact region in electrical communication with the active area. A portion of the contact region is configured to manifest a change in a visual attribute of the... Agent: Workman Nydegger

20080050115 - Optical communication system, optical communication apparatus, and optical communicaiton method thereof: An optical communication system includes a first optical communication apparatus configured to insert a wavelength control signal in a main signal to produce a modified main signal; convert the modified main signal into a first optical signal; and transmit the first optical signal, and a second optical communication apparatus configured... Agent: Young & Thompson

20080050117 - Method and apparatus for photonic resiliency of a packet switched network: A resilient photonic network includes a plurality of resilient switching nodes, each node comprising a photonic switch and one of a Layer-2/3 switch and router, and a plurality of bi-directional ports, each connected between the photonic switch the one of a Layer-2/3 switch and router, wherein at least one optical... Agent: Morgan Lewis & Bockius LLP

20080050118 - Methods and systems for bandwidths doubling in an ethernet passive optical network: Systems and methods for bandwidth doubling in an Ethernet passive optical network (EPON) enable an optical line terminal (OLT) to transmit downlink to at least one double rate optical network unit (ONU). The double rate transmission is preferably facilitated by use of single rate devices (OLT and ONU) functionally connected... Agent: Dr. Mark M. Friedman C/o Bill Polkinghorn - Discovery Dispatch

20080050120 - Cotdr arrangement for an undersea optical transmission system comprising multiple cable stations and multiple transmission segments: A land-based cable station is provided for interfacing with first and second undersea transmission segments of an undersea optical transmission system. The cable station includes optical transmission terminal equipment for receiving and transmitting optical signals that undergo opto-electric conversion therein. A first interface device is operably coupled to the terminal... Agent: Mayer & Williams PC

20080050121 - Submarine optical transmission systems having optical amplifiers of unitary design: A method for entering a market with high barriers to entry and a plurality of proprietary business elements includes converting at least one of the business elements into a universal business element that can accept a wide variety of inputs from other business elements, while converting a remaining one of... Agent: Mayer & Williams PC

20080050122 - Optical module: To provide an optical module capable of improving the workability for a circuit substrate, in the rear of a shield case (22), a pressing portion (27) for holding an FOT (6) is formed to press a back surface of a package portion (9) of the FOT (6). In the rear... Agent: Sughrue-265550

20080050123 - Integrated optical fiber and electro-optical converter: A fiber optic communications cable for providing a short range, high speed data communications link between information system units, including an optical fiber with an integral housing at each end having an electrical connector extending from the housing and adapted to mate with a corresponding electrical connector on an external... Agent: Casey Toohey

20080050124 - Optical signal processing circuit: An optical phase modulation circuit includes an optical phase modulation element, an optical bandpass filter, and an optical directional coupler, wherein control light with a wavelength of λC is coupled with probe light with a wavelength of λP using the optical directional coupler and input to the optical phase modulation... Agent: Knobbe Martens Olson & Bear LLP

20080050125 - Intra-channel nonlinearity compensation for optical data communications: An arrangement is described for compensating intra-channel nonlinearities in an optical communications system which combines optical dispersion compensation with electronic pre-distortion (EPD). EPD with moderate lookup table size can effectively suppress intra-channel nonlinearities over optical transmission links incorporating optical dispersion compensation. The arrangement can be implemented for a variety of... Agent: Brosemer, Kolefas & Associates, LLC - (lucent)

20080050127 - Dual beam splitter optical micro-components and systems and methods employing same: A micro-optic dual beam-splitter assembly comprises at least two beam-splitter optical filters and at least one photoreceptor. Each of the beam-splitter optical filters comprises an optical substrate having at least a coated or uncoated optical tap surface and a filter surface carrying a thin-film optical filter. The thin-film optical filters... Agent: Banner & Witcoff, Ltd.

20080050128 - Remote control receiver and electronic equipment including the same: At least a plurality of light-receiving regions for receiving remote control signals, respectively, in a form of incident light and performing photoelectric conversion of the signals are provided in one common mold package. The remote control receiver includes a first signal processing circuit for adding up signals outputted by the... Agent: Birch Stewart Kolasch & Birch

20080050126 - Selecting optical waves: A control module is configured to receive one or more input signals. An optical selection network includes a plurality of optical input ports configured to receive respective optical waves at an operative wavelength, and at least one optical output port configured to provide an optical wave at the optical wavelength.... Agent: Fish & Richardson PC

20080044176 - Method for implementing distribution of link state information in an optical network: A method for implementing distribution of link state information in an optical network includes: determining information of each link protection attribute section included in a Traffic Engineering (TE) link; carrying the information of each link protection attribute section in a customized TLV, respectively; distributing the TLV in the optical network... Agent: Townsend And Townsend And Crew, LLP

20080044177 - Method for detecting upstream timeslot conflict in passive optical network and optical line terminal therein: Embodiments of the present invention disclose a method for detecting an upstream timeslot conflict in a Passive Optical Network (PON). An Optical Line Terminal (OLT) detects a timeslot conflict in an upstream timeslot. An OLT is provided also, including an optical receiver, an optical transmitter, a control unit and a... Agent: Leydig Voit & Mayer, Ltd

20080044179 - Method and apparatus for monitoring the security of an optical cable link during installation: A method and apparatus is provided for installing an optical cable link between first and second communication access points is provided. The method begins by securing a first end of an optical cable to the first communication access point to establish optical connectivity therebetween. A second end of the optical... Agent: Motorola, Inc. Law Department

20080044180 - Transponder-less verification of the configuration of an optical network node: A method, apparatus, and program, for evaluating an optical network node. The method comprises providing at least one communication path of the node with a capability by which lasing can occur in the communication path, and detecting whether lasing has been established in the communication path to determine whether the... Agent: Fitzpatrick Cella Harper & Scinto

20080044181 - Multi-chassis router with multiplexed optical interconnects: A multi-chassis network device includes a plurality of nodes that operate as a single device within the network and a switch fabric that forwards data plane packets between the plurality of nodes. The switch fabric includes a set of multiplexed optical interconnects coupling the nodes. For example, a multi-chassis router... Agent: Shumaker & Sieffert, P.a

20080044185 - Optical network unit of ethernet passive optical network and control method thereof: An optical network unit (ONU) of an Ethernet passive optical network (EPON) and a control method thereof eliminates or substantially reduces instances of an ONU transmitting in time slots other than its allocated time slot. The ONU includes: a medium access controller for accessing a medium without temporal overlapping in... Agent: Cha & Reiter, LLC

20080044178 - Laser safety system: A laser safety system providing a system for checking the presence, focus and integrity of a laser beam focusing lens is disclosed. The laser safety system checks the focusing lens properties by capturing an image of a target by viewing the target through the focusing lens from along the laser... Agent: Pillsbury Winthrop Shaw Pittman LLP

20080044182 - Method and device of transmitting sdh services in passive optical network: A method of carrying SDH services in PON is provided, in which tributary units carrying SDH service data are mapped into payload part of GEM frames, thereby implementing transmission of SDH services in GPON. De-capsulation is performed in reverse process at receiving end. A device of receiving or transmitting SDH... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20080044183 - Optical transmission network with asynchronous mapping and demapping and digital wrapper frame for the same: An optical transmission network is inherently asynchronous due to the utilization of a variable overhead ratio (V-OHR). The network architecture makes extensive use of OEO regeneration, i.e., deals with any electronic reconditioning to correct for transmission impairments, such as, for example, FEC encoding, decoding and re-encoding, signal reshaping, retiming as... Agent: North Weber & Baugh LLP Carothers, W. Douglas

20080044184 - Balanced bypass circulators and folded universally-balanced interferometers: The invention generally relates, in one aspect, to an interferometer system. The interferometer system includes a splitter/combiner element (SCE), a first bi-directional optical path, and a second bi-directional optical path.... Agent: Goodwin Procter LLP Patent Administrator

20080044186 - Radio-over-fiber transponder with a dual-band patch antenna system: The radio-over-fiber (RoF) transponder includes a converter unit adapted to convert RF electrical signals into optical signals and vice versa, and an antenna system electrically coupled to the converter unit. The antenna system includes first and second Z-shaped patch antenna elements formed on an antenna substrate. These patches are adapted... Agent: Corning Cable Systems LLC

20080044187 - Mobile communications system: A communications system for wireless transceiving of information, comprising an optical array subsystem for transceiving optical signals and a millimeter wave subsystem for transceiving millimeter wave signals, and a beam steering controller for controlling the direction of the optical and millimeter wave signals. The communication system may be on a... Agent: The Johns Hopkins Universityapplied Physics Labora Office Of Patent Counsel

20080044188 - Information-processing system using free-space optical communication and free-space optical communication system: In a system for data communication between an information terminal to be operated by a user and remote communication nodes, the present invention intends to suppress the power consumption of the information terminal. For that purpose, communication nodes 2, 3 and 4 each emit diffuse light carrying a pilot signal... Agent: Oliff & Berridge, PLC

20080037981 - Optical communition system with n + 1 redundancy: An optical communication system has two or more active interfaces, each controlling the transmission and reception of optical signals between a communication network and one or more subscriber terminals according to control information pertaining to the individual subscriber terminals. The control information used by all the active interfaces is stored... Agent: Rabin & Berdo, PC

20080037985 - Method and apparatus for managing and transmitting fine granularity services: Embodiments of the present invention provide a method and an apparatus for managing and transmitting fine granularity services. The method includes: increasing the bandwidth of an existing LSP which controls a fine granularity service with the same granularity as that of a new fine granularity service to be established, upon... Agent: Baker & Hostetler LLP

20080037986 - Optical network terminal management and control interface (omci) containing a description of the omci: A network component is disclosed that includes a memory comprising a data structure comprising an optical network terminal management and control interface (OMCI) comprising a plurality of managed entities (MEs), wherein one of the MEs is a description of the OMCI. Also disclosed is a network component comprising a processor... Agent: Conley Rose, P.C.

20080037989 - Method and apparatus for handling data and aircraft employing same: These teachings present triple data transport redundancy in the form of three data bus interfaces that are each designed and manufactured independently from one another and compatible with a common data handling protocol. This protocol can be one that includes no error correction. These interfaces can each couple to a... Agent: Fitch Even Tabin And Flannery

20080037990 - Asymmetrical pon with multiple return channels: A passive optical network (PON) system comprising a plurality of optical network units (ONUs) having one downstream receiver and one upstream transmitter, an optical line terminal (OLT) having a downstream transmitter and a plurality of upstream receivers, wherein each upstream receiver is associated with a subset of the ONUs, and... Agent: Conley Rose, P.C.

20080037991 - Optical wavelength multiplex transmission apparatus, control method thereof and optical wavelength multiplex transmission system: An optical wavelength multiplex transmission apparatus includes a demultiplexer (12) that divides a wavelength-multiplexed optical signal into optical signals of individual wavelengths, an optical attenuation control portion (13) that performs an optical attenuation control so that levels of the optical signals of individual wavelengths become constant, a multiplexer (16) that... Agent: Staas & Halsey LLP

20080037982 - Path establishment: A method of establishing a path through an optical communications network is disclosed. Previously known method for establishing a path through an optical communications network include checking the viability of an end-to-end path once the complete end-to-end path has been selected. However, additional (and hence wasted) processing may be expended... Agent: Nixon & Vanderhye, PC

20080037983 - Channel power pre-emphasis in wavelength division multiplex optical communication systems: An iterative method for power pre-emphasis of N optical channels in a Wavelength Division Multiplex (WDM) signal in an optical communication systems in accordance with which representative Xi characteristics are defined for the channels with among the characteristics there being included at least one characteristic that is a function of... Agent: Coats & Bennett, PLLC

20080037984 - Optical transmission network with asynchronous mapping and demapping and digital wrapper frame for the same: An optical transmission network is inherently asynchronous due to the utilization of a variable overhead ratio (V-OHR). The network architecture makes extensive use of OEO regeneration, i.e., deals with any electronic reconditioning to correct for transmission impairments, such as, for example, FEC encoding, decoding and re-encoding, signal reshaping, retiming as... Agent: North Weber & Baugh LLP Carothers, W. Douglas

20080037987 - Communication/power network having out-of-band time and control signaling: The systems and methods provide an out-of-band time and control signal distribution network that may be employed in conjunction with a large scale area network. The network is capable of installation on the seafloor and comprises a plurality of network nodes being interconnected by fiber optic cable, and each having... Agent: Ropes & Gray LLP Patent Docketing 39/41

20080037988 - Method and apparatus for providing integrated symmetric and asymmetric network capacity on an optical network: A symmetrical capacity network may be adapted to accommodate asymmetrical network traffic patterns by deploying Protected Dedicated Wavelengths (PDWs) between one or more head-end nodes and the access nodes on a ring-based topology network. The PDWs include pairs of wavelengths extending in opposite directions around the fibers forming the original... Agent: John C. Gorecki, Esq.

20080037992 - Interactive optical cards and other hand-held devices with increased connectivity: A system for deriving benefits from the reception and processing of composite video signals by a hand-held device, such as a smart card. Video signals are modulated with auxiliary data creating composite video signals. The composite video signals are then transmitted to and received by a hand-held device. The auxiliary... Agent: Schwegman, Lundberg & Woessner, P.A.

20080037993 - Impedance matching circuit with simultaneous shielding of parasitic effects for transceiver modules: An RF device includes a signal layer disposed over a ground plane having radio frequency (RF) transmission lines configured and dimensioned to provide impedance matching along the RF lines. A shield is formed as a part of the RF lines and disposed below the RF choke of a DC current... Agent: James J. Bitetto, Esq. Keusey, Tutunjian & Bitetto, P.C.

20080037994 - Method, apparatus, and system for using an optical link with electrical link receiver detection: A method, apparatus, and system for implementing optical interconnects between high speed electrical interconnects by determining if an optical link exists between two optical transceivers, and if so, connecting input termination on the transmit input portion of each optical transceiver.... Agent: Trop Pruner & Hu, PC

20080037995 - Flexible substrate for routing fibers in an optical transceiver: An optical transceiver for converting and coupling an information-containing electrical signal with an optical fiber including a housing, an electro-optical subassembly in the housing for converting between an information-containing electrical signal and a modulated optical signal corresponding to the electrical signal from which at least two optical fibers extends; and... Agent: Casey Toohey Emcore Corporation

20080037996 - Compact systems for generating polarization-entangled photons: Various embodiments of the present invention are directed to compact systems for generating polarization-entangled photons. In one embodiment of the present invention, a non-degenerate, polarization-entangled photon source comprises a half-wave plate that outputs both a first pump beam and a second pump beam, and a first beam displacer that directs... Agent: Hewlett Packard Company

20080037997 - Optical sending apparatus and optical transmission system: The invention provides an optical sending apparatus which improves the characteristics near zero dispersion without sacrificing the characteristics at high dispersion in an optical duo binary scheme. The apparatus comprises an optical modulation sending unit, a driving signal processing unit, and a modulation operation switch-over unit for switching over the... Agent: Bingham Mccutchen LLP

20080037998 - Polarization-controlled encoding method, encoder, and quantum key distribution system: The invention relates to a polarization-controlled encoding method, encoder and quantum key distribution system, which is characterized in that polarization maintaining light path or 90 degree rotation Faraday mirror are used inside the encoder to keep the polarization of the output pulses same, and that in the quantum key distribution... Agent: Mcdermott, Will & Emery LLP

20080037999 - Wideband modulated signal generating device: The present invention provides a wideband modulated signal generating device capable of realizing an always stable operation and obtaining an intended wideband modulated signal in spite of a shift in the optimal bias voltage due to DC drift occurring in an optical intensity modulation section. In the wideband modulated signal... Agent: Wenderoth, Lind & Ponack L.L.P.

20080038000 - Monitoring and in-line compensation of polarization dependent loss for lightwave systems: A multi-wavelength optical signal copropagates through a fiber-optic communication link with a continuous-wave ancillary wavelength having an unknown state of polarization (SOP), which is scrambled periodically in time. The instantaneous value of polarization dependent loss (PDL) in the ancillary wavelength is monitored in real time, and is used as an... Agent: Fulbright & Jaworski L.l.p

20080038001 - Feedback-controlled coherent optical receiver with electrical compensation/equalization: An optical coherent receiver in one embodiment has a heterodyne configuration, and in another embodiment has a homodyne configuration, in each configuration employs multiple feedback signaling and analog/digital processing to optimize response to a modulated optical input signal, the provision of both individual RF I and RF Q channel outputs.... Agent: Kenneth Watov Watov & Kipnes, P.C.

20080031620 - Wireless monitoring of optoelectronic modules and network components: An optoelectronic module for converting and coupling an information-containing electrical signal with an optical fiber including a housing having an electrical input for coupling with an external cable or information system device and for transmitting and receiving information-containing electrical signals over such input, and a fiber optic connector adapted for... Agent: Casey Toohey

20080031623 - Providing optical signal regeneration information at the control plane: According to one embodiment, providing optical signal regeneration information for an optical path includes sending a path message through the optical path. The optical path comprises a sequence of nodes of a communication network, where the sequence of nodes comprises an initiating node, a set of intermediate nodes, and a... Agent: Baker Botts L.L.P.

20080031624 - Passive optical network optical time-domain reflectometry: Optical Time-Domain Reflectometer (OTDR) troubleshooting of a passive optical network (PON) can be enhanced by deploying cascaded splitters, at least some of which have multiple inputs. That is, at least some of the splitters in the PON have not only a first input coupleable to the optical line terminator (OLT)... Agent: James S. Halsey, Jr. Staas & Halsey

20080031627 - Optical communication system: An optical communication system having nodes that include add/drop units. The add/drop unit includes: a network input port for receiving optical energy having a plurality of different wavelengths from other nodes in the network; a network output port for coupling to destination nodes in the network; an add port for... Agent: Raytheon Company C/o Daly, Crowley, Mofford & Durkee, LLP

20080031619 - Method and device for recovering from inter-domain link failure: A method for recovering from an inter-domain link failure includes: initiating a local recovery, by an upstream node of a failed inter-domain link, a local recovery from the link failure; performing the local recovery from the link failure with the upstream node of the failed inter-domain link as a source... Agent: Ladas & Parry

20080031621 - Controlling optical signal transmission to reduce optical signal degradation: An optical transmission system and method may control optical signal transmission in an optical network, such as a passive optical network (PON), to reduce degradation of one or more optical signals traveling over the same optical waveguide. In particular, optical signal transmission may be controlled to reduce carrier to noise... Agent: Applied Optoelectronics, Inc.

20080031622 - Bidirectional router and a method of bidirectional amplification: The invention relates to a router which may be used for amplification of a bidirectional optical signal using a single optical amplifier. An advantageous embodiment of the invention comprises two 3 dB couplers which are serially connected via a delay element. According to the embodiment, the delay element comprises a... Agent: Baker Botts L.L.P.

20080031625 - Wdm hybrid splitter module: A downlink signal and WDM-PON signal from an OLT 1 are separated by an optical filter part 11, and a downlink signal is split by a power splitter part 12. A WDM-PON signal is also split in each wavelength by a demultiplexer part 13, and a downlink signal and a... Agent: Smith Patent Office

20080031626 - Photonic integrated circuit (pic) chips: A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated... Agent: North Weber & Baugh LLP Carothers, W. Douglas

20080031628 - Wireless/optical transceiver devices: An optical/wireless transceiver device is operable to convert an input optical signal to an outgoing radio frequency signal, and to convert an incoming radio frequency signal to an output optical signal.... Agent: Welsh & Katz, Ltd

20080031629 - Optical transceiver module having an active linear optoelectronic device: An optoelectronic transceiver comprises an active linear TOSA circuit mounted on a header. The active linear TOSA circuit includes input nodes for receiving a differential signal pair, a first bipolar transistor, a second bipolar transistor and an electro-optical transducer. A base terminal of the first bipolar transistor is coupled to... Agent: Workman Nydegger

20080031630 - Optical transmitter and optical transmission system: An optical SSB-SC modulation section 13 subjects an optical signal fa outputted from an optical source 11 to an optical SSB-SC modulation based on the amplitude of an external electric signal fc to thereby output an optical intensity-modulated signal. An optical phase modulation section 14 subjects the optical signal fa... Agent: Wenderoth, Lind & Ponack L.L.P.

20080031631 - Dustproof transceiver: A dustproof transceiver includes a transceiver body, a first dustproof cover and a second dustproof cover. The transceiver body has an opening to receive an optical fiber connector. The first dustproof cover is pivotally connected on the transceiver body to swivel and shelter a part of the opening. The second... Agent: Pai Patent & Trademark Law Firm

20080031632 - Electronic device with reflection structure for reflecting optical signal to receiver thereof: The electronic device includes a device housing, an emitter, a receiver, and a reflection structure. The emitter is separated from the device housing and emits an optical signal. The receiver is disposed on the device housing for receiving the optical signal. The reflection structure is formed on the device housing... Agent: North America Intellectual Property Corporation

20080031633 - Multi-level modulation receiving device: A multi-level modulation receiving device for adaptively compensating for chromatic dispersion and polarization mode dispersion with high precision. Each equalizing filter has at least one variable parameter as a weight therefor and equalizes the waveform of a corresponding channel signal in accordance with an averaged variable parameter value. A signal... Agent: Staas & Halsey LLP

20080031634 - Linear amplifier for use with laser driver signal: An active linear amplifier circuit mounted in an optoelectronic package includes input nodes for receiving a differential signal pair, a first bipolar transistor, a second bipolar transistor, an electro-optical transducer and a decoupling circuit. A base terminal of the first bipolar transistor is coupled to the two input nodes and... Agent: Workman Nydegger

20080031635 - Optical transmitter: An object of the present invention is to provide an optical transmitter that can suppress degradation of distortion characteristic and RIN characteristic caused by relaxation oscillation at high temperature by controlling average driving current of a light emitting element so that the average optical output power of the light emitting... Agent: Pearne & Gordon LLP

20080031636 - Chirp managed laser (cml) transmitter: A fiber optic communication system comprising: an optical signal source adapted to receive a binary base signal having a bit period T, and generate a first signal, wherein the first signal is frequency modulated; and an optical spectrum reshaper (OSR) adapted to reshape the first signal into a second signal,... Agent: Mark J. Pandiscio Pandiscio & Pandiscio, P. C.

20080031637 - Equipment for optical communications: For conventional cipher communications based on the principles of quantum mechanics, the photon number per signal has needed to be controlled below 1 or to a mesoscopic level in order to make quantum-mechanical properties remarkable. This invention is intended to provide a quantum-mechanical communications' method that is practical even in... Agent: Stanley P. Fisher Reed Smith LLP

20080031638 - Optical reception circuit and identification level controlling method for the same: An optical reception circuit and an identification level controlling method for an optical reception circuit are disclosed wherein reception sensitivity degradation arising from transmission waveform degradation by chromatic dispersion can be suppressed. The optical reception circuit includes a photoelectric converter for converting reception light into an electric signal, a pre-amplifying... Agent: Staas & Halsey LLP