Optical communications inventions

20090263122 - Method and apparatus for network diagnostics in a passive optical network: A method and apparatus are described for allowing diagnostics of a Passive Optical Network without significant loss of service to active customer sites. A plurality of primary transmitters operating at a first wavelength band are coupled to an optical switch of an optical network operating at a first wavelength band.... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090263123 - Fiber network monitoring: This specification describes technologies relating to optical fiber network monitoring. A monitoring system is provided. The monitoring system includes a fiber network including a plurality of branch fibers and a main station coupled to a main fiber of the fiber network to broadcast communications signals to a plurality of branch... Agent: Fish & Richardson P.C.

20090263124 - Methods of protection sharing for multi-protected optical demands in large-scale wdm mesh networks: A method and system for identifying and, optionally, managing protection resource sharing opportunities, such as within a large-scale wavelength-division multiplexing (WDM) mesh network.... Agent: Wall & Tong, LLP/ Alcatel-lucent Usa Inc.

20090263125 - Light mark, method and device for light mark modulation and demodulation: A light mark, a method and a device for light mark modulation and demodulation are disclosed. The modulation method includes: generating a mark with periodically alternating frequency and interval; and modulating the mark signal onto an optical signal. In the present disclosure, the mark with periodically alternating frequency and interval... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090263126 - Monitoring the physical layer of optoelectronic modules: Monitoring the physical layer of optoelectronic modules in a storage area network (SAN). In one example embodiment, a method for monitoring the physical layer of optoelectronic modules in a storage area network includes various acts. First, diagnostic data is gathered from a plurality of optoelectronic modules. Next, the diagnostic data... Agent: Workman Nydegger 1000 Eagle Gate Tower

20090263127 - Methods and devices for reducing power consumption in a passive optical network while maintaining service continuity: The present invention discloses methods for reducing power consumption in a PON while maintaining service continuity, the method including the steps of: providing an OLT operationally connected to at least one ONU; triggering a sleep request for at least one requesting ONU; upon receiving a sleep acknowledgement, activating a sleep... Agent: Dr. Mark M. Friedman C/o Bill Polkinghorn - Discovery Dispatch

20090263128 - Fiber optic multiplex modem: A fire alarm network fiber optic multiplex modem includes plural local interfaces, a fiber optic interface, a multiplexor, a fiber optic modem, and a demultiplexor. The multiplexor combines data received at the local interfaces into an outgoing data stream. The fiber optic modem transmits, at a first wavelength, the outgoing... Agent: Gerald M. Bluhm Tyco Safety Products

20090263129 - High-speed packet/ethernet devices, methods, systems and networks incorporating tunable pluggable optics for packet switching and routing functions, and incorporating gmps as the control plane: Devices, systems software, hardware, apparatus, networks, methods and combinations thereof for providing high speed, high capacity digital transmission over fiber-optic communications networks and systems are provided. The invention is particularly effective and useful in Ethernet systems and other communications networks. The photonic systems of the invention are adapted and arranged... Agent: Gary L. Shaffer

20090263130 - Gigabit passive optical network transmission convergence extension for next generation access: An apparatus comprising a data framer configured to frame a data stream into a plurality of frames each comprising a plurality of fields sized to align the frames with a word boundary greater than or equal to about four bytes long, and an optical transmitter coupled to the data framer... Agent: Conley Rose, P.C.

20090263131 - Method and system for transmitting ethernet data in an optical transport network: A method and a system for transmitting Ethernet data in an optical transport network (OTN), may include: filling justification byte or Ethernet service data bytes in at least two pairs of negative justification opportunity (NJO) bytes and positive justification opportunity (PJO) bytes in an overhead byte of an optical channel... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090263132 - Method of introducing an outstation into an optical network and outstation therefor: The present invention relates to the introduction of an outstation into an optical network. The optical network has a central station, and a plurality of previously introduced outstations which are optically connected to the central station. The network is operable in: a normal operating state in which data traffic is... Agent: Nixon & Vanderhye, PC

20090263133 - Optical communication network system, parent station optical communication device, and child station optical communication device: In a downstream channel communication, an individual downstream channel wavelength is allocated to each group of user nodes, and for user nodes in a same group, a central office performs a downstream-signal communication by a same communication method using the individual downstream channel wavelength. In an upstream channel communication, all... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090263134 - Dual-filter optical network interface unit and method of removing noise using same: A network interface unit includes an input for receiving downstream signals from an optical fiber, an optical pathway leading from the input, a laser connected to the optical pathway for transmitting upstream signals in a first wavelength band, and a receiver for receiving downstream signals in a second wavelength band... Agent: Commscope By Muncy, Geissler, Olds & Lowe, PLLC

20090263135 - Method and apparatus for transporting client signal in optical transport network: A method for transporting a client signal in an optical transport network (OTN) includes steps as follows. A byte number Cn of a client signal transported in a current OTN frame period is generated according to a client signal clock and a system clock. If the Cn of the current... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090263136 - Polarizaton diversity for optical fiber applications: At least two light beams with polarization diversity are generated that each carry a representation of the same information. Separate optic fibers carry each of the at least two beams through a region subject to vibration to a remote location where the information is recovered by an optical receiver based... Agent: Carmen Patti Law Group , LLC

20090263137 - Photonic rf down-converter based on optomechanical oscillation: An all optical radio frequency converter. The invention relates to a microtoroid optomechanical oscillator that can provide a local oscillation frequency and a mixing functionality. The microtoroid optomechanical oscillator can be fabricated from a silica-on-silicon wafer. When an input optical signal having an optical carrier frequency carrying a modulated RF... Agent: Milstein Intellectual Property Law LLC

20090263138 - Free-space optical communication system: A free-space communication system and method of operation includes a first communication device physically coupled to a substrate and having an optical transmitter for communicating information. A second communication device is physically coupled to the substrate and has an optical receiver for communicating information. An adjustable optical beam deflector is... Agent: Freescale Semiconductor, Inc. Law Department

20090263139 - Method and apparatus for increasing voice service for an optical network terminal (ont): An Optical Network Terminal (ONT) has a fixed number of voice ports. A system employing an example embodiment of the invention increases the number of voice ports without changing hardware in the ONT by employing an Analog Terminal Adaptor (ATA) expander and configuring the ATA expander through use of a... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20090263140 - Optical communication module and flexible printed circuit board: A flexible printed circuit board includes: a signal wiring pattern including: a transmission line for connecting an end of an optical device with an end of a signal generation circuit; and another transmission line for connecting another end of the optical device with another end of the signal generation circuit;... Agent: Mcdermott Will & Emery LLP

20090263141 - Dual use of test point power monitor: A channel alignment system in an optical communication network includes logic to sample power of a quadrature amplitude modulation (QAM) channel at a component downstream from a QAM modulator. The system determines if the sampled channel power has a sufficient level. The system signals power control logic of the QAM... Agent: Fsp LLC

20090263142 - Tunable optical filter: A tunable PLC optical filter having sequentially connected thermally tunable Mach-Zehnder (MZ) interferometers is described. The MZ interferometers, having free spectral ranges matching ITU frequency grid spacing, are tuned so as to have a common passband centered on the frequency of the signal being selected, while having at least one... Agent: Pequignot + Myers LLC

20090263143 - Optical communication integration: An integrated circuit die has a transistor circuitry section for implementing information handling operations. Optical circuitry is within the single semiconductor die. The optical circuitry includes a laser transmitter and is operably coupled to the transistor circuitry section. The transistor circuitry section originates information. The optical circuitry transmits the information... Agent: Freescale Semiconductor, Inc. Law Department

20090263144 - Linearized phase modulated analog optical links: A phase-modulated analog optical link that uses parallel interferometric demodulation to mitigate the dominant intermodulation distortion present in the link. A receiver for demodulating phase modulated optical signals includes a splitter dividing the phase modulated signal into parallel optical paths, each optical path having an asymmetrical interferometer, the time delays... Agent: Naval Research Laboratory Associate Counsel (patents)

20090257742 - Joint ip/optical layer restoration after a router failure: A method and system for providing joint IP/Optical Layer restoration mechanisms for the IP over Optical Layer architecture, particularly for protecting against router failure within such architecture, includes any one of plural node elements participating in the detection and restoration of the joint IP/Optical Layer architecture upon the failure of... Agent: Mr. S.h. Dworetsky At&t Corp.

20090257743 - Monitoring of optical transmission systems based on cross-correlation operation: In optical communication systems, an optical signal which is modulated with a data signal is transmitted from an optical transmitter, and is launched into a fiber-optic transmission link. The present invention provides a method and an apparatus for the measurement of the distribution of the reflectivity along an optical transmission... Agent: Oliff & Berridge, PLC

20090257744 - Transceiver system and data transmission method: A transceiver system includes a transceiver; and a transceiver control apparatus. In the transceiver, a determining circuit determines whether a reception signal group including a transmission data is in a normal state or in an abnormal state. A control circuit reads the transmission data from a buffer section when a... Agent: Nec Corporation Of America

20090257745 - Method and apparatus for testing transmitters in optical fiber networks: An eye mask is provided that is defined at least partially in terms of absolute, or non-relative, optical power level values. In essence, the eye mask of the invention is a hybrid of the traditional eye mask in that the eye mask of the invention includes power level values on... Agent: Kathy Manke Avago Technologies Limited

20090257746 - Oss support for control plane technology: The OSS provides unique and automated provisioning, activation, fallout management and monitoring of SONET and WDM networks comprising control plane mesh and traditional SONET/WDM Rings/Chains. Resource discovery and dynamic provisioning provides for increased use of network bandwidth. It is possible both all control plane networks and mixed control plane and... Agent: Telcordia Technologies, Inc.

20090257747 - Testing a fiber link in a communication system without interrupting service: There is provided a method for testing an optical fiber link. The method includes employing a wavelength division multiplexer (WDM) to receive a signal via a port of the WDM and multiplex the signal onto the optical fiber link. The signal is used in a test of the optical fiber... Agent: Verizon Patent Management Group

20090257748 - Optical transmission apparatus and optical transmission method: An optical transmission apparatus that performs optical transmission by wavelength multiplexing includes a receiving unit that receives a first optical signal transmitted from a transmitting device; a wavelength determining unit that determines wavelength of the first optical signal received by the receiving unit; a transmitting unit that transmits a second... Agent: Staas & Halsey LLP

20090257749 - Upgradeable passive optical network: A passive optical network is upgraded by a subsystem PON2 for additional high speed communication. The additional subsystem PON2 enables independent high speed communication between a new type of optical network terminations with second downstream time division multiplex signals and second upstream multiplex burst signals via additional upstream and downstream... Agent: Lerner Greenberg Stemer LLP

20090257750 - Optical code division multiplex communication method, system, and module: An optical communication system uses superstructured fiber Bragg gratings (SSFBGs) to encode and decode an optical pulse signal transmitted between two optical communication devices. Each SSFBG has uniformly spaced fiber Bragg gratings, producing a chip pulse train with a uniform phase difference between chips. The phase difference defines a code.... Agent: Rabin & Berdo, PC

20090257751 - Aggregating optical network device: A method and apparatus for an electrically switched optically protecting network device is described. One embodiment of the invention established pairs of optical circuits between different electrically switched optically protecting network devices acting as access nodes of an optically switched network. The network device communicates different add/drop traffic flows between... Agent: Blakely Sokoloff Taylor & Zafman LLP

20090257752 - Network media selecting method and device thereof: A method for operating a network device is provided. The method comprises steps of providing a first transceiver to establish a first link via a first medium; providing a second transceiver to establish a second link via a second medium; and enabling one of the first and the second transceivers... Agent: Volpe And Koenig, P.C.

20090257753 - Electroacoustic transducer: An acoustoelectric transducer comprising a laser source A and a light receiver H, wherein a soundfield S is provided by which the propagation velocity of the laser beam may be modulated according to the sound pressure while it traverses the soundfield S.... Agent: Nxp, B.v. Nxp Intellectual Property & Licensing

20090257754 - Form factor adapter module: Various example embodiments are disclosed. According to one example embodiment, a form factor adapter module may include a small form factor (SFF) host connector, an X2 or XENPAK edge finger connector, and a serial to XAUI transceiver. The SFF host connector may be configured receive a small form factor pluggable... Agent: Brake Hughes Bellermann LLP

20090257755 - Modulation scheme with increased number of states of polarization: A modulation method for optical communication comprises the step of generating an optical signal modulated between a plurality of different states of polarization and between different phase states. The plurality of states of polarization comprises first states of polarization. The first states of polarization define a single great circle on... Agent: Carmen Patti Law Group, LLC

20090257756 - Optical receiver and optical phase control method thereof: An optical receiver includes: delay interferometers respectively provided in at least two branches that branch a reception signal; a phase shift amount control device that controls a phase shift amount of the delay interferometer in accordance with an optical phase control value; a balanced optical detecting section that respectively photoelectrically... Agent: Staas & Halsey LLP

20090257757 - Signal identification in optical communications networks: Signals in an optical communications network, such as optical channels in an optical WDM network for example, are each identified by at least two low frequency dither tones with which the signal is modulated. The dither tones alternate with a predetermined periodicity to produce a cyclically repeated sequence of dither... Agent: Victoria Donnelly

20090257758 - Optical receiving apparatus: In an optical receiving apparatus for receiving an optical DQPSK signal, a phase difference between both arms of an optical interferometer is controlled to an optimum value. The optical DQPSK signal is incident on two optical interferometers in each which a delay-time difference between two arms is set to be... Agent: Mattingly & Malur, P.C.

20090252491 - Sensing a disturbance: The present invention relates to a system for sensing of a disturbance on an optical link. Data traffic from an optical source with a short coherence length is transmitted along the link to a receiver station on one or more of a plurality of time-division-multiplexed channels. One of the channels... Agent: Nixon & Vanderhye, PC

20090252492 - Optical communication system , and optical communication method and communication unit therefor: A communication unit inhibits delay and jitter during network communication, improving the communication quality. For this purpose, the communication unit includes: a first terminator that terminates a communication channel in the first optical communication scheme established between the communication unit and another communication unit; a second terminator that terminates a... Agent: Staas & Halsey LLP

20090252493 - Network node, buffer device, and scheduling method: A buffer device includes at least one internal switching unit and at least one basic buffer unit. The internal switching unit includes at least two inputs and at least two outputs. The internal switching unit and the basic buffer unit form a closed connection by alternating with each other via... Agent: Leydig, Voit & Mayer, Ltd (for Huawei Technologies Co., Ltd)

20090252494 - Method for transmitting data packets with different precedence through a passive optical network: A method of transmitting data packets through a passive optical network. The method includes: receiving a first data packet from a first interface of the passive optical network, the first data packet including precedence information; encapsulating the first data packet in a second data packet at the first interface; and... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20090252495 - Method and apparatus for demultiplexing optical signals in a passive optical network: Methods and structures are disclosed demultiplexing optical signals transmitted over an optical fiber into a silicon substrate and to multiple detectors. The silicon substrate has two spaced-apart surfaces and a diffractive element disposed adjacent to one of the surfaces. Each of the optical signals corresponds to one of multiple wavelengths.... Agent: Townsend And Townsend And Crew LLP

20090252496 - Communication network using code division multiplexing technology: A communication network which can use communication bandwidth effectively. Spreading codes of a first and a second code length are assigned for every communication terminal interfaces connected to the same communication network. The spreading codes of the first code length are used for data communications. The spreading codes of the... Agent: Venable LLP

20090252497 - Method and apparatus for compensating for polarization mode dispersion (pmd): Current optical networks are engineered to handle amplifier noise and chromatic dispersion. Polarization mode dispersion occurs in optical networks due splitting of the light energy of a pulse propagating in a fiber into two modes. Compensating for polarization mode dispersion is a difficult and expensive task and hence only few... Agent: Hamilton, Brook, Smith & Reynolds, P.C.

20090252498 - Optical routing and transport acceleration (orta): Conversions between digital, parallel-electronic and digital, serial-optic words are presented, specifically for interconnection networks with optical communication links.... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

20090252499 - Apparatus and method for sending and receiving free space optical signals: A free space optical communication system incorporates a kinematic sensor, such as an accelerometer, proximate an optical signal generator or emitter, such as a laser. Kinematic information generated using an output signal from the kinematic sensor is encoded along with a time signal and transmitted from the sending node to... Agent: Townsend And Townsend And Crew, LLP

20090252500 - Optical modulator: It is an object of the invention to provide an optical modulator in which a connection substrate or a terminal substrate is disposed outside an optical modulation element and which can maintain at a proper voltage amplitude value a modulation signal applied to an optical modulation element. An optical modulator... Agent: Chapman And Cutler

20090252501 - Device and method for transmitting optical data signals: Disclosed are a device and a method for transmitting an optical data signal over an optical transmission channel, comprising a differential phase shift keying unit for differential phase shift keying of at least one serial data stream to generate a differential phase shift keying coded data stream; an amplitude shift... Agent: Jenkins, Wilson, Taylor & Hunt, P. A.

20090252502 - Methods and systems for optical communication: An optical communication system includes an optical carrier signal source that provides an optical carrier signal and one or more optical modulators coupled to the optical carrier signal source. The optical modulators modulate the optical carrier signal to produce a continuous wave optical signal in response to one or more... Agent: Townsend And Townsend And Crew, LLP

20090252503 - Optical transmission module and optical transmission system: An optical transmission module includes one or more transmission optical devices for transmitting an optical signal L1, one or more reception optical devices for receiving another optical signal L2, and an optical member for converting optical paths for one or more optical signals L1 and one or more optical signals... Agent: Mattingly & Malur, P.C.

20090252504 - Optical receiver: The optical receiver includes: a light receiving element 1 for outputting a current in response to a light receiving level of an optical signal; a preamplifier 2 whose gain is controlled in a variable manner based upon a control voltage, for converting the current signal outputted from the light receiving... Agent: Birch Stewart Kolasch & Birch

20090252505 - Phase-modulated signal receiving device: A monitor circuit detects the average light receiving current of a photoelectric conversion device for receiving a positive-phase intensity-modulated signal and outputs the detected current value to a control unit. The control unit adjusts the heater current of a phase adjustment heater in such a way as to maximize or... Agent: Staas & Halsey LLP