Optical communications inventions

20080101795 - Data signal amplitude and cross-point detectors in an optical modulator control system: According to embodiments of the present invention, an optical modulator control apparatus receives a data signal and determines amplitude and cross-point of the data signal using a full wave detector. The apparatus sums the negative and positive halves of the data signal to determine the amplitude and differences the negative... Agent: Blakely Sokoloff Taylor & Zafman

20080101796 - Bidirectional optical module: A bidirectional optical module having a light-emitting device 1 for emitting transmitting signal light therefrom, an optical fiber 8 which the transmitting signal light emitted from the light-emitting device is made to enter, a light-receiving device 9 which receiving signal light made to emerge from the optical fiber is made... Agent: Kratz, Quintos & Hanson, LLP

20080101793 - Network address association recovery: Techniques for reestablishing network address associations upon recovery of a passive optical network (PON) disablement rely on storage address association information. A network node stores address association information in non-volatile memory upon detecting a network disablement. Upon recovery of the PON from the disablement, the network node associates network addresses... Agent: Shumaker & Sieffert, P. A.

20080101794 - Testing of transmitters for communication links by software simulation of reference channel and/or reference receiver: A transmitter for a communications link is tested by using a (software) simulation of a reference channel and/or a reference receiver to test the transmitter. In one embodiment for optical fiber communications links, a data test pattern is applied to the transmitter under test and the resulting optical output is... Agent: Fenwick & West LLP

20080101797 - Method and receiver to increase the spectral efficiency of dpsk modulation format: The optical DPSK demodulator converts phase into amplitude variations by delaying one path of an interferometer by one bit period. This operation includes a differentiation of the transmitted signal, which must be counteracted by applying a precoder at the TX side. By variation of the delay within the interferometer the... Agent: Sughrue Mion, PLLC

20080101798 - Communication by radio waves and optical waveguides: The invention relates to improvements to full-duplex bi-directional opto-electrical transducers, primarily for use in radio-over-fiber installations, such as remote-antenna installations for cellular radio apparatus. The transducer is of the kind based on an electroabsorption modulator, and the first improvement consists in biasing it by means of a constant-current source rather... Agent: Corning Incorporated

20080101799 - Polarization mode dispersion monitoring and fault correlation: A method and apparatus for a monitoring technique for the rate of change of polarization state and of the polarization mode dispersion is proposed. This technique is used for performance monitoring and fault correlation as well as for the verification of commitments to customers with respect to the transmission system's... Agent: Patterson & Sheridan, LLP/ Lucent Technologies, Inc

20080101800 - Dipole induced transparency drop-filter cavity-waveguide system: A normally opaque waveguide interacting with a drop-filter cavity can be switched to a transparent state when the drop filter is also coupled to a dipole. This dipole induced transparency may be obtained even when the vacuum Rabi frequency of the dipole is much less than the cavity decay rate.... Agent: Morrison Ulman Nupat, LLC

20080101801 - Small form pluggable analog optical transmitter: A pluggable small form factor optical transmitter is described. The optical transmitter can be plugged into an optical transmission unit which may hold many optical transmitters. The optical transmitter includes an analog laser for QAM transmissions, a TEC driver, pre-distortion circuitry, a microprocessor, and an automatic power control circuit and... Agent: Motorola, Inc. Law Department

20080101802 - Receiving apparatus and electronic device using the same: A photodiode receives an infrared signal transmitted from a transmitter. A current distributing unit outputs a detection current Id output from the photodiode as a first detection current Id1 and a second detection current Id2 to a subsequent first current-to-voltage conversion amplifier and a subsequent second current-to-voltage conversion amplifier respectively.... Agent: Cantor Colburn, LLP

20080101803 - High dynamic range optical receiver: An optical receiver having a photodetector, amplifier, feedback loop, and output circuit is disclosed. The photodetector generates a current between first and second nodes in response to being illuminated with light. The amplifier has an input connected to the first node and an output connected to a third node. The... Agent: Kathy Manke Avago Technologies Limited

20080095532 - Techique of identifying a defective subscriber device in a point-to-multipoint network without stopping normal subscriber devices: In a point-to-multipoint network of an optical line terminal (OLT) and multiple optical network units (ONUS) wherein each ONU is enabled to send a signal only within a time period enabled for the ONU, the OLT (or a system installed therein) identifies a defective one of the ONUs. For each... Agent: Staas & Halsey LLP

20080095533 - Short-distance communication method and apparatus using visible light: Disclosed is a short-distance communication method and an apparatus using visible light. The apparatus scans ambient light, measures optical power of visible light, among visible light included in the ambient light, having a wavelength corresponding to a transmission wavelength used for the visible light communication, compares a minimum transmission optical... Agent: Cha & Reiter, LLC

20080095536 - Method and system for hybrid integrated 1xn dwdm transmitter: An integrated DWDM transmitter apparatus includes a silica-on-silicon substrate overlying a first support component. The silica-on-silicon substrate includes a silica layer overlying a silicon layer. A coefficient of thermal expansion of the first support component is substantially matched to a coefficient of thermal expansion of the silicon layer. An optical... Agent: Townsend And Townsend And Crew, LLP

20080095537 - Optical transmission device: An optical transmission device capable of preventing deterioration in the transmission quality of a signal beam. A wavelength-multiplexed signal beam from a transmission path is split by a splitter, and the split signal beams are input to first and second optical paths, respectively. An add/drop unit for adding/dropping a wavelength-multiplexed... Agent: Staas & Halsey LLP

20080095531 - Device and method for inspecting optical modulator: An aspect of the present invention provides a device for inspecting an optical modulator. The device can comprise: a probe card that converts an inputted control signal to a driving signal, and provide the driving signal by contacting with each driving signal input pad of an optical modulator—wherein the optical... Agent: Christensen, O'connor, Johnson, Kindness, PLLC

20080095534 - Method for operating a telecommunications access network: The invention relates to telecommunications network (10), and in particular to a Passive Optical Network (PON), and a method for operation thereof. The telecommunications network (10, 60) is capable of handling increases in bandwidth per user over the predicted lifetime of the network infrastructure. The telecommunications network (10, 60) further... Agent: Coats & Bennett, PLLC

20080095535 - System, device and method for transporting signals through passive optical network: A system for transporting signals through PON, including a device for transporting optical network signals and a device for transporting optical line signals, wherein: the device for transporting optical network signals is adapted to map upstream optical signals with a PON frame format to upstream optical channel data unit signals,... Agent: Akin Gump LLP - Silicon Valley

20080095538 - Optical transponders with reduced sensitivity to polarization mode dispersion (pmd) and chromatic dispersion (cd): Optical transponders with reduced sensitivity to PMD and CD are described. In one embodiment, an optical transponder comprises a differential group delay (DGD) mitigator integrated within the transponder and optically coupled to an optical input port of the optical transponder, an optical receiver integrated within the optical transponder and optically... Agent: Fulbright & Jaworski L.l.p

20080095539 - Apparatus for controlling channel power level in a multi channel system: The present invention allows an operator to individually control the power level of each communication channel in a network without affecting other parameters of the channels. Each optical transmitter contains a voltage controlled variable optical attenuator which is controlled by a microcontroller to attenuate the optical communication signal to a... Agent: Motorola, Inc. Law Department

20080095540 - Optical transmission device and optical transmission system: An object of the invention is to clear up factors in deterioration due to optical reflection and to provide an optical transmission apparatus and an optical transmission system in which a superior optical transmission characteristic can be obtained for analog signals even if a reflection phenomenon occurs in an optical... Agent: Pearne & Gordon LLP

20080095541 - Optical transceiver for 40 gigabit/second transmission: An optical transceiver for converting and coupling an information-containing electrical signal with an optical including a housing having an electrical connector with a plurality of XFI electrical interfaces for coupling with an external electrical cable or information system device and for transmitting and/or receiving an information-containing electrical signal having a... Agent: Emcore Corporation

20080095542 - Integrated termination for eo modulator with rf signal monitoring functionality: The invention relates to RF termination for reducing electrical signal reflections at the end of transmission line electrodes on an electro-optical (EO) optical modulator. The disclosed termination incorporates a RF tap which permits the monitoring of the RF power and reflection conditions at the EO modulator. The integrated termination/tap can... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist P.A.

20080095543 - Optical communication apparatus and optical add/drop apparatus: An apparatus comprising an optical modulator modulating a light in accordance with a modulation signal and an operating point of the optical modulator, to thereby output a modulated optical signal; and a controller controlling the operating point in accordance with a branched portion of the modulated optical signal and a... Agent: Staas & Halsey LLP

20080095544 - Optical transmitter and transmitting method for transmitting cryptogram: A dynamic range of intensity modulation is set to range from a maximum intensity Smax to a minimum intensity Smin. A difference Δ(=Smax−Smin) between the maximum intensity Smax and the minimum intensity Smin is divided by the number 2M of multilevel signals. Thus, a distance (an intensity difference) between adjacent... Agent: Wenderoth, Lind & Ponack L.L.P.

20080089681 - Monitoring system, optical transmitting/receiving device and monitoring level setting method: A monitoring system according to an exemplary aspect of the invention is a monitoring system for use in an optical transmission system that monitors an input level of an optical amplifier and issues an alarm if the input level gets out of a predetermined range, wherein a threshold value for... Agent: Sughrue Mion, PLLC

20080089685 - Apparatus of adjusting optical signal transmission timing: In a light reception element such as an APD (Avalanche Photo Diode) used for receiving a high-speed and weak optical signal, it is possible to prevent the phenomenon of distortion of a signal inputted after a large-level light is received. A PON (Passive Optical Network) system includes an OLT (Optical... Agent: Mcdermott Will & Emery LLP

20080089686 - Passive optical network system and ranging system thereof: A station-side communication device connected to subscriber-side communication devices via an optical combining device; sending, to the subscriber-side communication devices, a distance measurement request signal; computing transmission delay times of optical signals from the individual subscriber-side communication devices by receiving distance measurement signals, and including: a threshold control part identifying... Agent: Mcdermott Will & Emery LLP

20080089687 - Wavelength division multiplexing passive optical network having multiple branches of optical distribution: Various methods and apparatuses are described for a wavelength division multiplexing passive optical network (WDM-PON) that performs bi-directional communication. The WDM-PON may include two or more remote distribution nodes in between a central office and the most distant optical network unit. Each remote distribution node is located in a physically... Agent: Blakely Sokoloff Taylor & Zafman

20080089688 - Method and system for integrated dwdm receivers: An integrated DWDM receiver apparatus includes a support component and a silica-on-silicon substrate overlying the support component. The substrate includes a silica layer overlying a silicon layer and includes a first surface region and a second surface region. An optical demultiplexer is disposed within the silica layer under the first... Agent: Townsend And Townsend And Crew, LLP

20080089682 - Automated testing and analysis of dense wave division multiplexing (dwdm) switching devices: The introduction of automation of testing configuration and the extensive use of protocol adaptation to provide a consistent user interface for a test apparatus across multiple vendor implementations through the use of programmable adapter modules facilitates systematic and efficient testing. Proper functionality of a given optical switch implementation, quantification of... Agent: Verizon Patent Management Group

20080089684 - Dwdm and cwdm hybrid pon system and method: A passive optical network (PON) comprises an Optical Line Termination (OLT), an Optical Distribution Network (ODN), and a plurality of Optical Network Terminations (ONTs), wherein the OLT includes an OLT Dense Wavelength Division Multiplexing (DWDM) multiplexer, an OLT CWDM demultiplexer, and a Wavelength Division Multiplexing (WDM) filter, wherein the OLT... Agent: Alcatel Lucent Intellectual Property & Standards

20080089683 - Transport frame architecture for multi-rate service, multiplexing apparatus for processing the transport frame and method for transmitting it: The present research relates to s a transmission frame structure supporting a data service and a circuit service of diverse bands in a Synchronous Optical Network (SONET)/Synchronous Digital Hierarchy (SDH) network. This research provides a transmission frame structure including a sync period, an async period, and a control period and... Agent: Lahive & Cockfield, LLP

20080089690 - Isolating radio frequency components of a wireless device: Radio frequency components may be optically isolated from lower frequency components of a transceiver to improve the sensitivity and transmission efficiency in some embodiments. In one embodiment, an optical waveguide may be utilized to isolate the low noise amplifier from other components downstream in the received path. Similarly, an optical... Agent: Trop Pruner & Hu, PC

20080089689 - Line bypass system using vendor specific area of common public radio interface (cpri): To provide means for taking action against a fault of a CPRI link of a radio base station in which a CPRI is used as an internal interface between a radio control unit and a radio unit at a low cost, a communication device for directly connecting a plurality of... Agent: Bingham Mccutchen LLP

20080089691 - Embedded parametric monitoring of optoelectronic modules: 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 electrical cable or information system device and for transmitting and receiving information-containing electrical signals over such input, and a fiber optic connector adapted... Agent: Casey Toohey Emcore Corporation

20080089692 - Mutual wavelength locking in wdm-pons: Methods and apparatuses to provide wavelength locked WDM Passive Optical Networks (“PONs”) are described. A first transceiver transmits a set of optical signals in a first direction along a wavelength channel. A second transceiver transmits another set of optical signals along the same wavelength channel in another direction. The wavelength... Agent: Blakely Sokoloff Taylor & Zafman

20080089693 - Systems and methods for the integration of framing, oam&p, and forward error correction in pluggable optical transceiver devices: The present invention provides integrated framing in pluggable optical transceivers to extend the OTN framework into metro, regional, and core applications. Additionally, the present invention provides integrated FEC and optical layer OAM&P features into pluggable optical transceivers. This integration is done with existing pluggable transceivers defined by MSAs such as,... Agent: Clements Bernard Miller

20080089694 - Infrared light emitting and receiving system: An infrared light emitting and receiving system (10) includes an infrared light emitting device (100), and an infrared light receiving device (200). The infrared light emitting device including a heat sink (102), at least a heat pipe (104), a metallic plate (106), and at least an infrared light source (108)... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang Jeffrey T. Knapp

20080089695 - Chromatic dispersion compensation control method and apparatus: A chromatic dispersion compensation control method for compensating the chromatic dispersion of an optical transmission path with a variable dispersion compensator inserted in the optical transmission path is disclosed. The method includes a transmitter inserting a fixed data sequence in the rewritable area of a transmission data sequence to be... Agent: Staas & Halsey LLP

20080089696 - Quantum communication system, quantum repeater apparatus, quantum repeater method, and computer program product: A quantum repeater apparatus performs an entanglement swapping (ES) process for sharing an EPR pair with another node, and performs an entanglement purification protocol (EPP) process with the node with which the EPR pair is shared. The quantum repeater apparatus selects, when performing a last EPP process, a classical channel... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080089697 - Method and system for grating taps for monitoring a dwdm transmitter array integrated on a plc platform: An integrated DWDM transmitter apparatus includes a silica-on-silicon substrate which includes a silica layer and a silicon layer. A plurality of input waveguides and a plurality of gratings are provided within the silica layer. Each of the plurality of gratings is coupled to a corresponding one of the input waveguides.... Agent: Townsend And Townsend And Crew, LLP

20080089698 - Optical arbitrary waveform generation and processing using spectral line-by-line pulse shaping: An apparatus and method is disclosed for producing arbitrary optical and electrical waveforms. The apparatus includes a means for accepting or generating a comb-like optical spectrum, and an optical pulse shaper. The optical pulse shaper includes a spatial dispersion means, and a spatial modulating means having the capability to substantially... Agent: Brinks Hofer Gilson & Lione

20080089699 - Methods for automatic tuning optical communication system: A method for remotely tuning a transmitter in an optical communication system includes sending a control signal from a first location to a temperature controller at a second location and setting a first transmitter at the second location to a first temperature by the temperature controller in response to the... Agent: Xin Wen

20080089700 - Receiving apparatus, transmitting apparatus, receiving method, and transmitting method for optical signal dispersion compensation: Prior to data communication, an optical signal at a predetermined bit rate and an optical signal at a bit rate different from the predetermined bit rate are received from a transmitting apparatus. In a compensation amount controller, incremental amounts by which a compensation amount is changed are set corresponding to... Agent: Staas & Halsey LLP

20080085114 - Optical transmission line monitoring device, optical transmission line monitoring method, and computer program: In an optical transmission line monitoring device, an input unit is manipulated by a user, and inputs selection command data indicating that alarm data displayed on a screen is selected an alarm data that will not be output. A exclusion data processing unit adds, to detection data stored in a... Agent: Sughrue Mion, Pllc

20080085115 - Testing optically amplified links with time-division multiplexed test signals: A time division multiplexed measurement technique is used for spectral measurements in active wavelength division multiplexed loaded optical links, and offers instantaneous real-time correlation of performance and spectral parameters of the link, which is important for dynamic characterization of link performance during transient effects or polarization mode dispersion fluctuations.... Agent: Allen, Dyer, Doppelt, Milbrath & Gilchrist P.a.

20080085116 - Traffic signal node cross scheduling method and system: A traffic signal node cross scheduling method includes: decomposing a multi-wavelength signal into multiple first single-wavelength signals; decomposing a first single-wavelength signal into multiple small-granularity wavelength signals; scheduling the multiple small-granularity wavelength signals; and converging the multiple small-granularity wavelength signals after scheduled into a second single-wavelength signal. A traffic signal... Agent: Leydig Voit & Mayer, Ltd

20080085118 - High capacity optical frequency division multiple access passive optical network: A passive optical network (PON) component comprising a first coupler, a second coupler in communication with the first coupler via a plurality of communication paths, a delay module located on one of the communication paths, and a balanced detector in communication with the second coupler. The disclosure includes a method... Agent: Conley Rose, P.c.

20080085119 - Compact high-resolution tunable optical filter using optical diffraction element and a mirror: At least one diffraction element is used to diffract light of multiple wavelengths into different wavelength components. Instead of moving the diffraction element as in certain prior filters, light from the at least one element is reflected back towards the at least one element so that light is diffracted at... Agent: Davis Wright Tremaine LLP

20080085117 - System and method for communicating optical signals between a data service provider and subscribers: An optical fiber network can include an outdoor laser transceiver node that can be positioned in close proximity to the subscribers of an optical fiber network. The outdoor laser transceiver node does not require active cooling and heating devices that control the temperature surrounding the laser transceiver node. The laser... Agent: Steven P. Wigmore, Esq. King & Spalding LLP

20080085120 - Optical transceiver integratable with silicon vlsi: A modulator for an optical transceiver is disclosed. The modulator has two quarter-wave stack mirrors composed of alternating dielectric layers with an optically absorbing layer sandwiched in between to form the vertical resonant cavity. The optically absorbing layer is made of semiconductor nanocrystals embedded in a dialectic material. The device... Agent: John P. O'banion O'banion & Ritchey LLP

20080085121 - Optical transponder for secure optical communications and optical quadrature-measuring instrument: Regardless of a transmission basis, a phase of a signal light with reference to a phase of local light is measured, and an output light from an antisqueezed light source in a transponder device is modulated in accordance with the measured phase. Since information obtainable in the transponder device is... Agent: Stanley P. Fisher Reed Smith Hazel & Thomas LLP

20080085122 - Optical data transmission, optical data transceivers and method of manufacturing and packaging thereof: An optical data transceiver (100) comprises an integrated circuit (101), having provided on one side thereof a light sensing emitting means (104). A reflecting and receiving means (102), is mounted on the same surface of integrated circuit (101) as the light sensing or emitting means (104). The reflector means is... Agent: Townsend And Townsend And Crew, LLP

20080085123 - Optical switch based on parametric interaction: A method and apparatus for switching at least one wavelength component of an optical signal beam from a first state to a second state. The phase characterizing the optical signal component is incremented by interaction with one or more escort beams in a non-linear medium thereby switching the state of... Agent: Bromberg & Sunstein LLP

20080085124 - Clock generation with minimum number of crystals in a multimedia system: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to present a transport stream having (i) audio/video data, (ii) video presentation time stamps, and (iii) audio presentation time stamps. The second circuit may have one or more phase locked loop circuits and a... Agent: Lsi Corporation

20080085125 - All-optical regenerator and optical network incorporating same: The present invention provides an optical networking device for re-amplifying, re-shaping, and re-timing an optical signal, as well as providing distortion compensation and performance monitoring of the optical signal. The optical networking device includes an all-optical regenerator device for one or more of re-amplifying, re-shaping, and re-timing the optical signal;... Agent: Clements Bernard Miller

20080085126 - Optical signal shutoff mechanism and associated system: A mechanism for adjusting or shutting off an optical signal within a network system is provided. The system may include a generating element for providing an optical signal and a bi-directional coupler for transmitting the optical signal to downstream components and fiber links and for transmitting a reflected optical signal... Agent: Verizon Patent Management Group

20080085127 - Optical transmitter and optical transmission system: An optical transmitter of the invention phase modulates an output light from a light source according to data using a phase modulator, and then supplies it to an intensity modulator. The intensity modulator performs pulse carving of the output light from the phase modulator in accordance with a clock signal... Agent: Staas & Halsey LLP

20080085128 - Multi-stage method and system for coherent diffractive beam combining: A system or method coherently combines a large number of light beams at a single wavelength in multiple stages to form a high-power diffraction limited output beam. A two-stage system, or method based thereon, includes a master oscillator transmitting a light beam to a first phase modulation stage, which splits... Agent: Snell & Wilmer L.l.p. (grumman)