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Optical communications

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
09/04/2014 > 12 patent applications in 9 patent subcategories.
08/28/2014 > 25 patent applications in 19 patent subcategories.

20140241712 - Large-capacity fiber optical switching device and optical transmission system: A highly reliable optical switching device and optical switching method ensure restoration of the failure in the large-capacity high density wiring of the multicore fiber with the general number of cores (7 cores, 19 cores and the like). An optical transmission system which transmits a supervisory control signal concerning a... Agent: Hitachi, Ltd.

20140241711 - Low latency data transmission network: A communications networking having reduced transmission latency and improved reliability is described. To reduce signal transmission latency, network management data is removed from a data stream to prioritize the transmission of payload data at higher transmission rates. Management data is returned to the data stream in such a way that... Agent: Aoptix Technologies, Inc.

20140241713 - Collecting status from a partner management domain: An apparatus comprising a Generic Status Portal (GSP) configured to grant access to a Managed Entity (ME) via an Optical Network Terminal (ONT) Management and Control Interface (OMCI), wherein the ME comprises status information about a non-OMCI management domain at the ONT. Also included is an apparatus comprising at least... Agent: Futurewei Technologies, Inc.

20140241715 - Method and controller for commissioning wavelength division multiplexing optical network during capacity expansion: The present invention discloses a method and a controller for commissioning a wave division multiplexing optical network during capacity expansion. The method includes: calculating, according to a preset rule, initial power of a wavelength service to be added and adding one or more wavelength services according to the initial power;... Agent: Huawei Technologies Co., Ltd.

20140241714 - Protocol system and related method of automatically switching connection: A method of automatically switching connection is disclosed in the present invention. The method is applied to connection setting between a signal transmission device and at least one signal transceiver device. The method includes outputting a detecting signal to search the signal transceiver device within an effective range of the... Agent: Pixart Imaging Inc.

20140241716 - Scene illuminator: A system is disclosed to identify authorized EO devices and unauthorized EO devices within a scene. The system hampers the operation of the unauthorized EO devices detected within the scene.... Agent:

20140241717 - Dynamic wavelength virtualization and/or on-demand flow provisioning in optical networks: A network apparatus used in an optical network is disclosed. The network apparatus includes one or more first tunable and temperature controlled (TTC) lasers, one or more transmitters each of which is connected to one of said one or more TTC lasers, one or more second TTC lasers, one or... Agent: Nec Laboratories America, Inc.

20140241718 - Optical transceiver device: An optical transceiver device is provided, including an O/E transceiver module, an optical switching module and a switching control module, for providing network communication services for a first and a second optical fiber network equipment. The O/E transceiver module is an integrated chip having multiple transceiver units integrated therein. The... Agent:

20140241719 - Wavelength path switching method, optical communication system, optical communication device, optical relay device, and network management device: At least one of a first device, a second device, and a relay device compensates for wavelength dispersion in a first optical wavelength path. The first or second device changes a wavelength dispersion compensation amount at the first or second device so that wavelength dispersion in a second optical wavelength... Agent: Fujitsu Limited

20140241720 - Latching optical switch and subsystem using bistable liquid crystal: A submarine network includes a submarine network with a branching unit BU for splitting or combining a signal between a main trunk path and a branch path for allowing signals from different paths to share a same fiber optic path, said BU and submarine network normally having a fixed and... Agent: Nec Laboratories America, Inc.

20140241721 - Optical burst switched network nodes: An optical node includes a wavelength splitter configured to split optical signals comprising multiple optical wavelengths into separate outputs, with each of the separate outputs having a different wavelength. The optical node further includes a detector configured to detect optical signals associated with packets at each of the separate outputs,... Agent: Verizon Patent And Licensing Inc.

20140241722 - Pdm-(m) ask optical systems and methods for metro network applications: An apparatus, e.g. an optical communication system, includes an optical transmitter and an optical receiver. The transmitter includes a laser configured to provide an optical signal amplitude-modulated among M different levels, e.g. in two polarizations. The receiver is configured to demodulate the optical signal to produce a received symbol constellation... Agent: Alcatel-lucent Usa Inc.

20140241723 - Bandwidth distribution based on prior granting cycles: An apparatus comprises a receiver configured to receive a reported queue depth for a current granting cycle, and a processor coupled to the receiver and configured to determine accumulated bandwidth credits from at least one granting cycle prior to the current granting cycle. An apparatus comprises a transmitter configured to... Agent: Futurewei Technologies, Inc.

20140241724 - Transmission prioritization based on polling time: An apparatus comprises a receiver configured to receive a plurality of instructions, a plurality of first messages, and a plurality of second messages, a processor coupled to the receiver and configured to process the instructions, the first messages, and the second messages, and a transmitter coupled to the processor and... Agent: Futurewei Technologies, Inc.

20140241725 - Wavelength assignment for multiple operator support: An apparatus comprising a plurality of optical line terminals (OLTs) corresponding to different providers that share an optical distribution network (ODN), a plurality of optical network units (ONUs) coupled to the OLTs via the same ODN and configured to communicate with the different OLTs using different corresponding pairs of upstream... Agent: Futurewei Technologies, Inc.

20140241726 - Temperature controlled multi-channel transmitter optical subassembly and optical transceiver module including same: A temperature controlled multi-channel transmitter optical subassembly (TOSA) may be used in a multi-channel optical transceiver. The temperature controlled multi-channel TOSA generally includes an array of lasers optically coupled to an optical multiplexer, such as an arrayed waveguide grating (AWG), to combine multiple optical signals at different channel wavelengths. The... Agent: Applied Optoelectronics, Inc.

20140241727 - Communication between transceivers using in-band subcarrier tones: The invention relates to a system and method of communication between optical transceivers in an optical WDM network, wherein a broad-band modulation of optical signals in a primary frequency band is utilized for transmitting primary high-speed data, while a plurality of relatively low-frequency in-band subcarriers is used to modulate the... Agent:

20140241728 - Method and system for receiving an optical-duo-binary signal: The invention inter alia relates to a method of receiving an optical-duo-binary, ODB, signal (S), which has a predefined ODB-transmission bit-rate (B), using a photoreceiver, said method comprising the step of filtering the ODB signal using a filter (10) which provides a frequency peak in the photoreceiver's frequency response located... Agent:

20140241729 - Optical communications system: An optical communications system is disclosed. In the optical communications system, a received light source is modulated in accordance with an electrical signal using an acousto-optic modulator. The acousto-optic modulator modulates an amplitude of the received light source in accordance with an amplitude of the electrical signal. Furthermore, an angle... Agent: Loki Systems LLC

20140241730 - Method and apparatus for power-efficient joint dimming and visible light communication: A method, an apparatus, and a computer program product for communication are provided. The apparatus obtains a message for communication using visible light communication (VLC) through a light emitting diode (LED) luminary device and formats the message using a synchronization signal followed by one or more data signals. The synchronization... Agent: Qualcomm Incorporated

20140241731 - System and method for free space optical communication beam acquisition: A free space optical communication system (10) including first and second mono-static transceivers (20a, 20b). Each transceiver (20a, 20b) includes a reflective assembly (40) defining a reflective surface (44) about a receiving end of a respective optical fiber (32) and configured to reflect optical signals (26) within a field of... Agent: Harris Corporation

20140241732 - Transmitter, receiver, and method: A feature of the present invention pertains to a transmitter for transmitting data by video, the transmitter including a transmission data control unit that distributes the data to multiple colors constituting the video, and a display unit that converts the distributed data into a sequence of a predetermined color value... Agent: Ntt Docomo, Inc.

20140241733 - Optical communication apparatus: An optical communication apparatus includes a substrate having a through hole; an optical element which includes a light terminal for receiving or sending light and is mounted on a surface of the substrate so that the light terminal faces an opening of the through hole; a light guide member which... Agent: Fujitsu Component Limited

20140241734 - Light emitting device, manufacturing method thereof, and optical transceiver: The light emitting device includes an active layer formed on a semiconductor substrate for emitting light, a semiconductor layer of a first conductivity type electrically connected to one end of the active layer, a semiconductor layer of a second conductivity type electrically connected to the other end of the active... Agent: Hitachi, Ltd.

20140241735 - Visible light communication with increased signal-to-noise ratio: A method of increasing modulation of a visible light signal. The method can include receiving a signal that corresponds to the visible light signal, where the visible light signal has a magnitude. The method can also include adjusting, by a controller and based on the signal, a dimmer level of... Agent:

08/21/2014 > 29 patent applications in 23 patent subcategories.

20140233938 - System for interconnecting nodes attached to a passive optical network: A system for interconnecting one or more leaf nodes attached to the leaves of an optical distribution network (ODN), comprising: A first and a second optical distribution network respectively comprising a remote node for distributing signals from a central office and/or an optical line terminal to a plurality of leaf... Agent: Ntt Docomo, Inc.

20140233939 - Systems and methods of communicating path status in optical networks: The present disclosure may include a method to be performed by an electronic device in an optical network. The method may include generating a message associated with a slot and at least one connection identification (ID) corresponding to the slot. The message may include a slot counter region configured to... Agent: Fujitsu Network Communications, Inc.

20140233940 - System, method & apparatus for a rogue optics network unit: A device is provided that mitigates the effects of an optical network unit (ONU) that is in a rogue state. A main processor is arranged as part of a monolithic semiconductor chip, the main processor configured to process signals from an optical telecommunication connection. A laser driver controls a laser... Agent: Lantiq Deutschland Gmbh

20140233941 - Method for identifying the optical network unit power off reason: A passive optical network (PON) component comprising a power switch, a detector configured to monitor the power switch, and a processor configured to receive an interrupt from the detector and transmit a message comprising a first indicator that the PON component has powered down, and a second indicator giving a... Agent: Futurewei Technologies, Inc.

20140233942 - System and method for measuring the phase of a modulated optical signal: The invention is related to phase detection in lidar systems using single photon detectors (SPDs). The frequency at which the SPDs are time gated is related to but not an integer multiple of the frequency of the transmitted optical pulses. Each return optical pulse arrives with a particular temporal position... Agent: Nucrypt LLC

20140233944 - Optical network terminal (ont) wavelength tuning and correpsonding calibration procedure: Tuning an optical network unit (ONU) to an appropriate communication wavelength may be performed by initiating an activation procedure responsive to receiving a wavelength configuration message, and identifying an instruction in the wavelength configuration message to modify a present wavelength used by the network unit to a different wavelength. The... Agent:

20140233943 - Optical transmission device and optical transmission device control method: Each optical transmission device includes a detecting unit, a notifying unit, and a control unit. The detecting unit detects a value of the optical power of each of multiple wavelengths. The notifying unit notifies an optical transmission device at the upstream side of a control frame that includes the value... Agent: Fujitsu Limited

20140233945 - Wavelength division multiplexing optical transmitting apparatus and operating method of the same: Provided is a wavelength division multiplexing (WDM) optical transmitting apparatus including first to n-th optical transmitters configured to output first to n-th optical signals having different wavelengths, respectively; a wavelength multiplexer configured to multiplex the first to n-th optical signals and generate an output optical signal; a tap coupler configured... Agent: Electronics And Telecommunications Research Institute

20140233947 - Integrated assembly for switching optical signals: An integrated assembly for switching optical signals. The integrated assembly includes two subassemblies. For instance, the subassemblies might be a shelf assembly and the integrated assembly might be a rack assembly in which the shelf assemblies are connected. Each of the subassemblies includes optical interfaces configured to support communication of... Agent: Xtera Communications, Inc.

20140233946 - Replacing an existing network communications path with a new path using some exclusive physical resources of the existing path: In one embodiment, a replacement network communications path is determined using dedicated resources of an existing path. One or more network elements in a network determines a new communications path between a first network node and a second network node in the network while an existing communications path is currently... Agent:

20140233948 - Method and device for sending upstream transfer frame in passive optical network: The present invention relates to the Passive Optical Network (PON) technology, and a method for sending an upstream transfer frame in a PON is provided. The method includes: after success of link, sending a preamble according to an allocated time slot, sending a burst synchronization delimiter, and then sending successively... Agent: Huawei Technologies Co., Ltd.

20140233949 - Optical communication based on polarization dependent coherent optical nyquist frequency division multiplexing: An optical transmitter transmits a dual polarization optical Nyquist frequency domain multiplexed signal. The signal includes a first polarization component and a second polarization component. Each component comprises multiple subchannels, possibly having different subchannel bandwidths and different modulation schemes. An optical receiver receives the signal and recovers transmitted data.... Agent:

20140233950 - Downstream burst transmission in passive optical networks: An OLT comprising a processor configured to calculate a downstream bandwidth map that indicates an active period of time when the OLT is scheduled to transmit a data frame to an ONU, and generate a message comprising the downstream bandwidth map, and a transmitter coupled to the processor and configured... Agent: Futurewei Technologies, Inc.

20140233951 - Antenna system and methods for wireless optical network termination: Optical network termination systems, devices and methods including an optical network terminal (ONT) having a processor in communication with an external optical fiber. The ONT processors further in communication with a wireless access point and at least one electrically conductive internal transport medium, both providing for the communication of telecommunication... Agent: Centurylink Intellectual Property LLC

20140233952 - Methods and systems for delivery of multiple passive optical network services: A system for delivering multiple passive optical network services is disclosed. The system includes a first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers. The system further includes a second optical transmission service comprising a plurality of unique wavelength... Agent: Adc Telecommunications, Inc.

20140233953 - Passive optical network optical network terminal apparatus and configuration method: A method of configuring an optical network terminal, ONT, of a wavelength division multiplexed passive optical network, WDM PON. Sequentially setting a transmission wavelength of a tunable optical filter at the ONT to one or more wavelengths of a pre-selected plurality of transmission wavelengths until a wavelength is identified for... Agent: Telefonaktiebolaget L M Ericsson (publ)

20140233954 - Link establishment method for multi-wavelength passive optical network system: Provided is a method of establishing a link between service provider equipment and subscriber equipment in a multi-wavelength passive optical network system. The method of establishing a link includes acquiring information about a wavelength plan of allocated wavelengths in the MW PON system; transmitting a first signal wavelength initialization request... Agent: Electronics And Telecommunications Research Institute

20140233955 - Passive optical network system: A system for providing bi-directional RF services over a point-to-multipoint Passive Optical Network (PON). A system that can transport upstream RF signals generated by devices such as a set top box or a cable modem, through a passive Optical Network while simultaneously supporting downstream RF video and bi-directional base-band services... Agent:

20140233956 - Allocation of spectral capacity in a wavelength-division multiplexing optical network: A method for allocating spectral capacity in a WDM optical network comprising: —providing (4) a group of connection demands, —defining a group of candidate lightpaths that are adapted to carry an optical signal transparently, —defining a highest admissible spectral efficiency for each candidate lightpath, —computing (6) a respective spatial path... Agent:

20140233957 - Optical signal processing apparatus, transmission apparatus, and optical signal processing method: An optical signal processing apparatus includes: an optical frequency comb generation unit configured to generate an optical frequency comb; an extraction unit configured to extract a plurality of optical components having a certain frequency interval between the optical components from the optical frequency comb; and an optical carrier generation unit... Agent: Fujitsu Limited

20140233958 - Uni-fiber lasercom terminal design: A method, system, and apparatus for a uni-fiber laser communications (lasercom) terminal are disclosed herein. The apparatus includes an oscillator to generate a first signal having a first wavelength, and a modulator to modulate the first signal. The apparatus further includes a circulator to circulate the first signal, and a... Agent: The Boeing Company

20140233959 - Passenger services system for an aircraft: A passenger services system of an aircraft includes a cabin services system of a passenger service unit in the aircraft. The passenger service unit is associated with a passenger seat of the aircraft. The passenger services system further includes an infrared transmitting unit associated with the passenger seat. The infrared... Agent: The Boeing Company

20140233960 - Dynamic packet redundancy for a free space optical communication link: System (100) and methods (1100) for improving packet loss due to fast optical power fades in an FSO communication link (136). The methods involve: obtaining Channel Fade Statistics (“CFSs”) for the FSO communication link; and analyzing CFSs to determine if Redundant Packet Transmission (“RPT”) is required to mitigate fast optical... Agent: Harris Corporation

20140233961 - Optical communication module including optical-electrical signal converters and optical signal generators: An optical communication module includes a substrate, an optical signal receiving unit, an optical signal emitting unit and a coupler. The substrate includes a first surface and a second surface. The substrate defines through holes passing through the first and second surfaces. The optical signal receiving unit includes optical-electrical signal... Agent: Hon Hai Precision Industry Co., Ltd.

20140233962 - Optical modulator module and modulation method for optical signal: An optical modulator module includes an optical modulator including an optical waveguide which conducts an inputted optical signal, and m modulator regions on the optical waveguide; and m discrete driving circuits serially connected to one another. The discrete driving circuits include a driving circuit which outputs a signal obtained from... Agent: Nec Corporation

20140233963 - Optical output device and method for contorolling an optical transmitter: Since it is difficult to emit a control a IQ modulator emitting modulated lightwave according to QAM format without signal degradation of said emitted signal due to low frequency dither used for the control of said modulator, a method for controlling an optical transmitter according to an exemplary aspect of... Agent: Nec Corporation

20140233964 - Method for generating an optimized return-to-zero pulse shape against aggressive optical filtering and an optical transmitter implementing the method: An optical transmitter comprises: first and second sets of optical in-phase and quadrature modulators; an integrable tunable laser assembly; a first polarization beam splitter that is configured to divide the continuous-waveform optical signal into a x-polarized tributary and a y-polarized tributary, each of the x-polarized tributary and the y-polarized tributary... Agent: Zte (usa) Inc.

20140233965 - System and method for monitoring and control of an optical modulator for an m-qam transmitter: A system includes an optical power meter operable to generate an optical power signal corresponding to the optical power of a received output signal generated by an optical IQ-modulator. The system further includes a processor operable to receive the optical power signal and determine, based on a minimization algorithm and... Agent: Fujitsu Limited

20140233966 - Recovering data from quadrature phase shift keying modulated optical signals: Systems, devices and techniques for processing received QPSK modulated optical signals include sampling the received signal at twice the baud rate, thereby producing samples that are then processed as 9-QAM symbols using a decision directed least squares optimization method. Data bits are then recovered from the resulting symbol estimates. The... Agent: Zte (usa) Inc.

08/14/2014 > 28 patent applications in 18 patent subcategories.

20140226967 - Demand advertisement method for shared mesh protection path computation: A method includes the steps of: (1) generating, by circuitry of a first node, an advertising message including (a) a working path bandwidth demand; (b) an identification of at least two communication links in a shared risk link group of the working path; and (c) at least one protecting path... Agent:

20140226966 - Network and method for providing redundancy in an optical distribution network: Disclosed herein are optical distribution networks and corresponding methods for providing physical-layer redundancy. Example embodiments include a head-end passive optical splitter-combiner (OSC) to split optical signals from an Optical Line Terminal (OLT) onto primary and secondary optical paths for redundant distribution to optical network terminal(s) (ONTs), a passive access OSC... Agent: Tellabs Bedford, Inc.

20140226968 - Multiple access point laser communications terminal: A laser communications terminal configured for simultaneous two-way stabilized communications links to multiple ground sites. One example of such a laser communications terminal includes a plurality of laser channels, each including a channel transceiver configured to transmit and receive an optical signal, an afocal telescope optically coupled to each of... Agent: Raytheon Company

20140226969 - Method and apparatus for detecting a fault on an optical fiber: Mechanisms for operating a network element in an optical network are disclosed. A network element has a plurality of ports, each port including a respective receive input for receiving an optical signal from another network element and a respective transmit output for transmitting an optical signal to the other network... Agent: Rockstar Consortium US Lp

20140226970 - Pon supervision using otdr measurements: A Wavelength Adaptation Module and a method therein for adapting an Optical Time Domain Reflectometry, OTDR, signal for supervision of Optical Network Terminals, ONTs, in a Passive Optical Network, PON, are provided. The wavelength of the OTDR signal is adapted to have a selected wavelength to enable a splitter in... Agent: Telefonaktiebolaget L M Ericsson (publ)

20140226975 - Method and apparatus for boosting data intensive processing through optical circuit switching: A method is provided for improving performance of a distributed computing task being executed by computing devices interconnected by an optical switching fabric. Traffic flows between a plurality of nodes of a MapReduce application using an interconnected optical switching fabric are monitored. One or more optimizations for the interconnected optical... Agent: Sodero Networks, Inc.

20140226976 - Optical/radio local access network: A system that incorporates teachings of the subject disclosure may include, for example, a central controller that executes instructions facilitating performance of operations including monitoring multiple network nodes, at least some of the network nodes being in communication with others through respective point-to-point links. Each point-to-point link includes a respective... Agent: At&t Intellectual Property Ii, Lp

20140226972 - Propagating link status across a network: An access network comprises a first network interface device coupled to a customer network and configured to provide an interface between the access network and the customer network. The access network also comprises a second network interface device coupled to a core network and configured to provide an interface between... Agent: Calix, Inc.

20140226971 - System and method for compensating signal degradation in dual polarization optical systems: A method for adjusting an optical signal includes determining a polarization dependent loss (PDL) value associated with the optical signal, determining an angle between the optical signal and one or more axes of PDL, determining an amount of nonlinear phase noise due to PDL and nonlinear effects upon the optical... Agent: Fujitsu Limited

20140226974 - System and method for filtering an optical signal to avoid fading and to optimize linearity: A system for transmitting an optical signal over a fiber optic includes a terminal for generating the optical signal. Due to its modulation, the optical signal includes a carrier having a wavelength “λ”, with an upper sideband and a lower sideband. A tuner is connected with the terminal to adjust... Agent:

20140226973 - System and method for isolating rf signals for transmission over multiple channels on a single transmission path: A system for regulating the signal strengths of a plurality of Radio Frequency (RF) signals to reduce signal degradation includes a plurality of controllers. Each controller is operably positioned upstream of an electrical-to-optical converter which generates an optical signal for transmission over a fiber optic transmission path. Each controller functions... Agent:

20140226978 - Measuring signal to noise ratio of a wdm optical signal: A WDM optical signal is transmitted through a tunable optical filter and is polarization-nulled to find optical signal to noise ratio of individual WDM channels. The polarization nulling can be performed using a heuristic multipoint extrema search method, such as Nelder-Mead method. A plurality of checkpoints can be included in... Agent:

20140226977 - Methods and apparatus for efficient joint power line and visible light communication: A hybrid communications system implements different communication technologies to communicate data and information for particular communications directions in different portions of the system. Power line communications (PLC) signaling is used to deliver data and information from a gateway device to a light access point. Visible light communications (VLC) signaling is... Agent: Qualcomm Incorporated

20140226979 - Dwdm fast lightpath setup using network status information: Techniques are presented herein to setup a wavelength on a path from a source node to a destination node. Cross-talk margin information already computed for one or more installed wavelengths is obtained between the source node and destination node. A total margin as a function of the cross-talk margin information... Agent: Cisco Technology, Inc.

20140226980 - Low latency multiplexing for optical transport networks: Techniques for multiplexing and demultiplexing signals for optical transport networks are presented. A network component comprises a multiplexer component that multiplexes a plurality of signals having a first signal format to produce a multiplexed signal in accordance with a second signal format, while maintaining error correction code (ECC) of such... Agent: Applied Micro Circuits Corporation

20140226981 - Transmission method, transmission equipment and transmission system: A transmission method that transmits an optical signal via a plurality of virtual lanes in dual polarization or multi-level modulation includes: receiving a first frame signal of a first frequency and a second frame signal of a second frequency, and storing the first and second frame signals on a memory;... Agent: Fujitsu Limited

20140226982 - Distributed outdoor network apparatus and methods: Novel tools and techniques providing for the robust wire-based plus wireless distribution of communications signals from a provider to multiple customer premises. Certain embodiments comprise one or more modular communications apparatuses which are located near to customer premises. The modular communications apparatuses features an enclosure which is, at least in... Agent: Centurylink Intellectual Property LLC

20140226983 - In-flight li-fi media distribution system: A media distribution system for aircraft comprises a processor, an optical encoder/decoder, and an optical backbone. The processor is configured to retrieve digital media from an in-flight media node. The optical encoder/decoder is configured to optically encode the digital media. The optical backbone is configured to carry the encoded digital... Agent: Teac Aerospace Technologies, Inc.

20140226984 - Transparent clock for precision timing distribution: One or more devices of a network having asymmetric delay are configured to participate in time synchronization protocol sessions in which a client device synchronizes its local clock to a master device. In one example, a system includes an optical line terminal configured to receive a time synchronization protocol packet... Agent: Calix, Inc.

20140226985 - Virtual networking embedding procedure in an optical wavelength division multiplexing (wdm) network: e

20140226986 - Network fragmentation measurement in an optical wavelength division multiplexing (wdm) network: A method implemented in a network apparatus used in a wavelength division multiplexing (WDM) optical network is disclosed. The method includes (a) finding K-shortest routes between each node pair (s, d), where s, d∈V and |V|≦K, where V is a set of reconfigurable optical add-drop multiplexer (ROADM) nodes, (b) selecting... Agent: Nec Laboratories America, Inc.

20140226987 - Protected optical single-fiber wdm system: The invention relates to a protected optical single-fiber WDM system. A first (3) and a second (5) head-end terminal and at least one optical add/drop filter device (11) are connected to form a chain-like transmission path, each of the first and second head-end terminals (3, 5) being connected, at a... Agent:

20140226988 - Bidirectional optical data communications module having reflective lens: An optical transceiver module includes at least one light source configured to emit an optical transmit signal having a transmit wavelength, at least one light detector configured to detect an optical receive signal having a receive wavelength, and an optical coupling system having at least one reflective-and-focusing (RAF) lens and... Agent: Avago Technologies GeneralIP(singapore) Pte. Ltd

20140226989 - Node device, and control method and control program thereof: Provided is a node device in an optical communication system in which a plurality of node devices are connected by a plurality of optical fibers, including: at least a first optical transceiver that consumes a first power consumption amount during standby; at least a second optical transceiver that consumes a... Agent: Nec Corporation

20140226991 - Dual-wavelength bidirectional optical communication system and method for communicating optical signals: A bidirectional optical communication system includes first and second transceivers arranged at opposed ends of an optical medium. Opto-electronic devices within the transceivers are arranged on respective mounting surfaces of planar substrates. First and second optical assemblies couple the respective transceivers to the optical medium. The optical assemblies include first... Agent: Avago Technologies GeneralIP(singapore) Pte. Ltd .

20140226990 - Optical communication systems and methods for minimizing reflective feedback: An optical communication system includes a transceiver with a light source, a transition lens and an optical medium. Each of the light source, the transition lens and the optical medium define a corresponding axis. The light source defines a normal launch axis. The transition lens defines an optical axis. The... Agent:

20140226992 - Subscriber-side device and optical transmission system: An object of the present invention is to provide a subscriber-side device, which can generate accurate time information and can synchronize a time with other device even if a power supply of a portion that receives a downlink signal is in an OFF state, and to provide an optical transmission... Agent: Mitsubishi Electric Corporation

20140226993 - Optical line terminal transmitting device for next generation optical access networks: An Optical Line Terminal (OLT) transmitting device is provided, the device comprising an IQ modulator having a first input, a second input and an output, a first digital analog converter (DAC) directly coupled to the first input of the IQ modulator, a second digital analog converter (DAC) directly coupled to... Agent: Xieon Networks S.a.r.l.

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