Wavelength Division Or Frequency Division (e.g., Raman, Brillouin, Etc.) Patents (Class 398/79)
  • Patent number: 10439727
    Abstract: Methods and systems for selectable parallel optical fiber and WDM operation may include an optoelectronic transceiver integrated in a silicon photonics die. The optoelectronic transceiver may, in a first communication mode, communicate continuous wave (CW) optical signals from an optical source module to a first subset of optical couplers on the die for processing signals in optical modulators in accordance with a first communications protocol, and in a second communication mode, communicate the CW optical signals to a second subset of optical couplers for processing signals in the optical modulators in accordance with a second communications protocol. Processed signals may be transmitted out of the die utilizing a third subset of the optical couplers. First or second protocol optical signals may be received from the fiber interface coupled to a fourth subset or a fifth subset, respectively, of the optical couplers.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: October 8, 2019
    Assignee: Luxtera, Inc.
    Inventors: Greg Young, Peter DeDobbelaere
  • Patent number: 10432340
    Abstract: The present application provides an optical port auto-negotiation method, including: a: selecting a downstream to-be-received wavelength; b: listening to a downstream message on the selected downstream to-be-received wavelength, performing c if a wavelength idle message is received, and returning to a if no wavelength idle message is received within a specified or fixed time, where the wavelength idle message is used to identify that the wavelength is not occupied or not allocated; c: sending a wavelength application message on an upstream wavelength, performing d if a wavelength grant message is received in a downstream direction; otherwise, going back to a or b, where the wavelength application message is used to identify a request for allocation of the wavelength, and the wavelength grant message is used to identify acknowledgment of wavelength allocation; and d: setting an optical port auto-negotiation success flag bit. The present application further provides an optical module.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: October 1, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Sulin Yang
  • Patent number: 10432311
    Abstract: This invention relates to methods and systems for optimizing network catchment areas, in particular based on completion times of the customer premises. Embodiments of the invention aggregate different customer premises to form demarcated catchment areas by minimizing the overall weighted cost function comprising the distance and completion time within each catchment area, while also considering practical constraints. Embodiments of the invention allow network planners to specify their preferences of distance against time to produce cost-effective network schemes for very large numbers of customer premises and form network catchment areas without any overlapping.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: October 1, 2019
    Assignees: Khalifa University of Science and Technology, British Telecommunications PLC, Emirates Telecommunications Corporation
    Inventors: Kin Fai Poon, Fabrice Saffre, Kaltham Saeed Khalfan Alromaithi, Anis Ouali, Beum Seuk Lee
  • Patent number: 10417176
    Abstract: The present invention provides an integrated system-on-chip device. The device is configured on a single silicon substrate member. The device has a data input/output interface provided on the substrate member. The device has an input/output block provided on the substrate member and coupled to the data input/output interface. The device has a signal processing block provided on the substrate member and coupled to the input/output block. The device has a driver module provided on the substrate member and coupled to the signal processing block. The device further includes a driver interface and coupled to the driver module and configured to be coupled to a silicon photonics device. In an example, a control block is configured to receive and send instruction(s) in a digital format to the communication block and is configured to receive and send signals in an analog format to communicate with the silicon photonics device.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: September 17, 2019
    Assignee: INPHI CORPORATION
    Inventors: Radhakrishnan L. Nagarajan, Chao Xu
  • Patent number: 10409758
    Abstract: The present invention provides an integrated system-on-chip device. The device is configured on a single silicon substrate member. The device has a data input/output interface provided on the substrate member. The device has an input/output block provided on the substrate member and coupled to the data input/output interface. The device has a signal processing block provided on the substrate member and coupled to the input/output block. The device has a driver module provided on the substrate member and coupled to the signal processing block. The device further includes a driver interface and coupled to the driver module and configured to be coupled to a silicon photonics device. In an example, a control block is configured to receive and send instruction(s) in a digital format to the communication block and is configured to receive and send signals in an analog format to communicate with the silicon photonics device.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: September 10, 2019
    Assignee: INPHI CORPORATION
    Inventors: Siddharth Sheth, Radhakrishnan L. Nagarajan
  • Patent number: 10411825
    Abstract: An apparatus for transmitting optical signals between a central unit (1) and at least one remote unit (2), said central unit comprising—at least one amplified spontaneous emission source (11, 110) of an optical signal, first means (17, 170) adapted to polarize the optical signal deriving from the amplified spontaneous emission source in a first polarization plane by forming a first polarized optical signal (POS). The apparatus comprises second means (24) configured to receive said first polarized optical signal and to polarize it in a second polarization plane, orthogonal to the first plane, by forming in said first means a second optical signal (SOS) which is orthogonally polarized with respect to the first optical signal (17).
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: September 10, 2019
    Assignee: POLITECNICO DI MILANO
    Inventors: Mario Martinelli, Umberto Spagnolini
  • Patent number: 10404377
    Abstract: An optical transceiver includes electrical inputs that each correspond to a selected port of a number of network ports and a selected network lane of the selected port. The optical transceiver includes optical transmitters organized in groups to optically transmit data received at the inputs over a plurality of optical transmission fibers to which the groups correspond. The optical transceiver includes multiplexers corresponding to the transmission fibers. Each multiplexer is to wave-division multiplex the data transmitted by the transmitters within the group corresponding to the transmission fiber to which the multiplexer corresponds. The optical transceiver includes hardware logic to differently map the inputs to the transmitters according to a selected mode of a number of switchable modes corresponding to different data transmission bandwidths.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: September 3, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Kevin B. Leigh, David Olson
  • Patent number: 10389469
    Abstract: Systems, methods, and devices for adding an alien or native wavelength optical signal to a fiber optic line. A portion of a spectrum of the fiber optic line corresponding to the optical signal is blocked with a wavelength selective switch (WSS). The portion of the spectrum is gradually unblocked until a power of the optical signal measured after the WSS is equal to a predetermined level. If the power and characteristics of the optical signal after the WSS satisfy one or more criteria, the portion of the spectrum is further unblocked until the power of the optical signal measured at the output is equal to an operational level.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: August 20, 2019
    Assignee: Infinera Corporation
    Inventors: Omer Faruk Yilmaz, Nikhil Kumar Satyarthi, Parveen Kumar Gupta, Jaijo Jose, Saurabh Kumar, Stephane St. Laurent
  • Patent number: 10389450
    Abstract: A method of processing an optical input signal comprises transmitting the optical input signal through first and second signal paths, mixing the optical input signal with first and second local oscillator (LO) signals in the respective first and second signal paths to produce first and second electrical signals corresponding to different portions of a frequency spectrum of the optical input signal, and combining the first and second electrical signals to produce a coherent time-domain output signal.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: August 20, 2019
    Assignee: Keysight Technologies, Inc.
    Inventor: Bernd Nebendahl
  • Patent number: 10382847
    Abstract: In one embodiment, a distributed antenna system comprises: a master unit configured to receive a base station downlink radio frequency signal and to transmit a base station uplink radio frequency signal; and at least one remote antenna unit that is communicatively coupled to the master unit using at least one cable, the remote antenna unit configured to radiate a remote downlink radio frequency signal and to receive a remote uplink radio frequency signal; wherein the master unit comprises: a controller; and a respective interface to couple the controller to a first operator control panel; wherein the at least one remote antenna unit comprises: a controller; and a respective interface to couple the controller to a second operator control panel; wherein the master unit controller and the remote unit controller synchronize at least some information between the first and second operator control panels over the at least one cable.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: August 13, 2019
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Jaroslav Hoffmann, Peter Starek
  • Patent number: 10374750
    Abstract: An optical module processes first FEC (Forward Error Correction) encoded data produced by a first FEC encoder. The optical module has a second FEC encoder for further coding a subset of the first FEC encoded data to produce second FEC encoded data. The optical module also has an optical modulator for modulating, based on a combination of the second FEC encoded data and a remaining portion of the first FEC encoded data that is not further coded, an optical signal for transmission over an optical channel. The second FEC encoder is an encoder for an FEC code that has a bit-level trellis representation with a number of states in any section of the bit-level trellis representation being less than or equal to 64 states. In this manner, the second FEC encoder has relatively low complexity (e.g. relatively low transistor count) that can reduce power consumption for the optical module.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: August 6, 2019
    Assignee: INPHI CORPORATION
    Inventors: Benjamin P. Smith, Arash Farhoodfar
  • Patent number: 10333280
    Abstract: A configuration of a DFB laser-based wavelength tunable laser is well known, but long resonators have difficulty in forming uniform resonators due to production variations, thereby inducing limitation in narrowing the spectral linewidth in the DFB laser-based wavelength tunable laser as well. In the semiconductor laser device of the present invention, a semiconductor laser that oscillates in a single mode and a low-loss lightwave circuit using SiO2 glass are arranged on the common substrate. The lightwave circuit is configured such that part of output light from the semiconductor laser propagates through a certain length of an optical path, and then is reflected by a reflector and is fed back to the semiconductor laser. Output light from the semiconductor laser and an input waveguide of the lightwave circuit can also be configured to be optically connected directly to each other. The present invention can provide a compact laser device with a narrowed spectral linewidth and stable wavelength controllability.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: June 25, 2019
    Assignees: Nippon Telegraph and Telephone Corporation, Tohoku University
    Inventors: Hiroyuki Ishii, Naoki Fujiwara, Kei Watanabe, Mikitaka Itoh, Keisuke Kasai, Masataka Nakazawa
  • Patent number: 10312387
    Abstract: A single photon detector (SPD) includes a resonator to store probe photons at a probe wavelength and an absorber disposed in the resonator to absorb a signal photon at a signal wavelength. The absorber is also substantially transparent to the probe photons. In the absence of the signal photon, the resonator is on resonance with the probe photons, thereby confining the probe photons within the resonator. Absorption of the signal photon by the absorber disturbs the resonant condition of the resonator, causing the resonator to release multiple probe photons. A photodetector (PD) then detects these multiple probe photons to determine the presence of the signal photon.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: June 4, 2019
    Assignee: Massachusetts Institute of Technology
    Inventor: Dirk Robert Englund
  • Patent number: 10298329
    Abstract: A software-defined network multi-layer controller (SDN-MLC) may communicate with multiple layers of a telecommunication network. The SDN-MLC may have an optimization algorithm that helps manage, in near real-time, the multiple layers of the telecommunication network.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: May 21, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Gagan Choudhury, Kathleen Meier-Hellstern, Alvin Goddard, Narayan Padi, Simon Tse
  • Patent number: 10289595
    Abstract: The present invention provides an integrated system-on-chip device. The device is configured on a single silicon substrate member. The device has a data input/output interface provided on the substrate member. The device has an input/output block provided on the substrate member and coupled to the data input/output interface. The device has a signal processing block provided on the substrate member and coupled to the input/output block. The device has a driver module provided on the substrate member and coupled to the signal processing block. The device further includes a driver interface and coupled to the driver module and configured to be coupled to a silicon photonics device. In an example, a control block is configured to receive and send instruction(s) in a digital format to the communication block and is configured to receive and send signals in an analog format to communicate with the silicon photonics device.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: May 14, 2019
    Assignee: INPHI CORPORATION
    Inventors: Siddharth Sheth, Radhakrishnan L. Nagarajan
  • Patent number: 10284290
    Abstract: In some examples, a network device comprises one or more processors operably coupled to a memory, and a routing unit configured for execution by the one or more processors to route data traffic on a layer 3 network overlaying an optical transport system; receive optical supervisory channel data for an optical supervisory channel of the optical transport system; determine the optical supervisory channel data indicates an event affecting transmission or detection of a signal transported by a wavelength, the wavelength traversing an optical fiber of the optical transport system and underlying a link of the layer 3 network; and reconfigure, in response to determining the optical supervisory channel data indicates the event, a configuration of the network device to modify routing operations of the network device with respect to the data traffic on the layer 3 network.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: May 7, 2019
    Assignee: Juniper Networks, Inc.
    Inventors: Gert Grammel, Domenico Di Mola, Steven B. Alleston
  • Patent number: 10277313
    Abstract: There is provided a transmission apparatus configured to receive a frequency-division multiplexed optical signal generated by modulating carrier light based on a plurality of frequency-division multiplexed subcarrier signals, the transmission apparatus including: a processor configured to: extract a plurality of subcarrier signals of the plurality of frequency-division multiplexed subcarrier signals from the frequency-division multiplexed optical signal; calculate signal qualities of the plurality of subcarrier signals; detect a deviation of the signal qualities between the plurality of subcarrier signals; and perform a frequency control of the carrier light generated by an optical source of a transmission apparatus configured to transmit the frequency-division multiplexed optical signal, based on the deviation of the signal qualities.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: April 30, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Hisao Nakashima, Takeshi Hoshida
  • Patent number: 10277315
    Abstract: A method and an apparatus for monitoring a wavelength channel are disclosed. The method includes: performing optical-to-electrical detection on an optical signal on a wavelength channel, to obtain an electrical signal; obtaining a frequency spectrum of the electrical signal; determining a first parameter M according to an equation M=NAC, where NAC represents an alternating current component of the frequency spectrum of the electrical signal; and if M is greater than a preset first threshold, determining that the wavelength channel includes a real service signal. According to the method and apparatus, an erroneous configuration or operation of a network management system can be avoided.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: April 30, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Ning Deng, Juan Wang
  • Patent number: 10257597
    Abstract: A method for switching data signals transmitted over a transport network is disclosed. The method comprises receiving a plurality of input data signals of a first signal type wherein the plurality of data signals of the first signal type comprises data signals exchanged between a Radio Equipment and a Radio Equipment Controller and aggregating the plurality of input data signals into an aggregated first data signal. The method also comprises receiving a second data signal of a second signal type different to the first signal type, and multiplexing the first data signal with the second data signal to form a combined data signal. The method further comprises forwarding the combined data signal to the transport network. Multiplexing the first data signal with the second data signal comprises, for a frame of the combined data signal, allocating the first data signal to a portion of the frame reserved for the first data signal, and allocating the second data signal to a remaining portion of the frame.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: April 9, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Giulio Bottari, Fabio Cavaliere, Stefano Ruffini, Stefano Stracca
  • Patent number: 10256601
    Abstract: An optical module and a method of assembling the optical module are disclosed. The optical module comprises a laser unit, a modulator unit, and a detector unit mounted on respective thermo-electric coolers (TECs). The modulator unit, which is arranged on an optical axis of the first output port from which a modulated beam is output, modulates the continuous wave (CW) beam output from the laser unit. On the other hand, the laser unit and the detector unit are arranged on another optical axis of the second output port from which another CW beam is output. The method of assembling the optical module first aligns one of the first combination of the laser unit and the modulator unit with the first output port and the second combination of the laser unit and the detector unit, and then aligns another of the first combination and the second combination.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: April 9, 2019
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazuhiro Yamaji, Yasushi Fujimura, Toru Watanabe, Yasuyuki Yamauchi, Tomoya Saeki, Munetaka Kurokawa
  • Patent number: 10248616
    Abstract: The present invention provides an integrated system-on-chip device. The device is configured on a single silicon substrate member. The device has a data input/output interface provided on the substrate member. The device has an input/output block provided on the substrate member and coupled to the data input/output interface. The device has a signal processing block provided on the substrate member and coupled to the input/output block. The device has a driver module provided on the substrate member and coupled to the signal processing block. The device further includes a driver interface and coupled to the driver module and configured to be coupled to a silicon photonics device. In an example, a control block is configured to receive and send instruction(s) in a digital format to the communication block and is configured to receive and send signals in an analog format to communicate with the silicon photonics device.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: April 2, 2019
    Assignee: INPHI CORPORATION
    Inventors: Radhakrishnan L. Nagarajan, Chao Xu
  • Patent number: 10236992
    Abstract: An apparatus and method for mitigating wavelength drift in an optical communication network. A network node such as an OLT in a PON receives a transmission on a certain optical channel. The received signal is of course sent to a receive module for processing the data contained therein, and may be sent to an RSSI module for signal strength analysis. A portion of the received transmission, however, is directed to a wavelength control section where it is divided into at least a first path and a second path, the second path having a wavelength discriminator filter. The light propagating along each path is converted to an electrical signal and digitized for comparison by a microcontroller. The microcontroller calculates one or more power ratios and from this determines the receive signal wavelength. This wavelength is compared to the wavelength of a selected channel to determine what if any adjustments should be made.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: March 19, 2019
    Assignee: Nokia Solutions And Networks Oy
    Inventors: James J. Stiscia, Travis S Lentz
  • Patent number: 10230216
    Abstract: A tunable QCL source that utilizes a full bandwidth of a broadband THz QCL, and produces a significantly large number of frequency channels, is provided. The tunable QCL source includes a grating router configured to receive a terahertz frequency from a tunable quantum cascade laser and generate a plurality of terahertz frequencies. The tunable QCL source also includes a waveguide controller configured to receive the plurality of terahertz frequencies from the grating router, and select a desired terahertz frequency from the plurality of terahertz frequencies to be outputted by a waveguide multiplexer.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: March 12, 2019
    Assignee: The United States of America as Represented by the Admin of the National Aeronautics and Space Administration
    Inventors: Hung D. Nguyen, Rainee N. Simons, Edwin G. Wintucky
  • Patent number: 10225013
    Abstract: Particular embodiments use the segmented bandwidth in downstream channels and upstream channels to manage a narrowcast service for subscribers. Particular embodiments include a channel manager that can process the signal from the headend to down-convert and filter narrowcast services that are sent in one or more of the downstream channels. Also, in the upstream direction, the channel manager can up-convert and stack narrowcast signals for sending to the headend. Further, in one embodiment, the narrowcast service may be provided using visible light communication (e.g., Li-Fi). Using visible light communication may overcome the last connection restrictions described in the background, such as end to end optical connections may be used. Further, using visible light communication may not interfere with other Wi-Fi links in the subscriber premises, such as existing MoCA connections, and may actually enhance the service at the subscriber premises.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: March 5, 2019
    Assignee: ARRIS Enterprises LLC
    Inventors: Joaquin Beas Bujanos, Carlos Dominguez Jimenez, Jose Luis Lopez
  • Patent number: 10218615
    Abstract: A network system, a network control method and a control apparatus are provided that solve virtual network function deployment on a network. An apparatus (10) for controlling a network including a plurality of nodes and servers stores first information related to links and nodes on the network (20) and second information related to computing resources of servers (SV) on which virtual network functions (VNF) can be deployed and, when at least one virtual network function (VNF) is required, collectively performs deployment of the required virtual network function (VNF) on a server (SV) and configuration of a path (P) on the network connecting to the deployment-target server, based on the first and second information.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: February 26, 2019
    Assignee: NEC Corporation
    Inventor: Hayato Itsumi
  • Patent number: 10205554
    Abstract: In an electronic component mounting device, a first multiplexing device of a head section which is attachable to and detachable from a Y-axis slider is connected to a second multiplexing device through an electric communication cable. The first multiplexing device, from which the cable is likely to be removed, is connected through the electric communication cable for which the communication failure due to dust or the like is relatively unlikely to occur. Second and third multiplexing devices, from which cables are less likely to be removed, are connected through the optical communication cable. The second multiplexing device separates data directed to the input and output device, among frame data received from the third multiplexing device, multiplexes only data directed to the first multiplexing device from the second multiplexing device, and transfers the multiplexed data to the first multiplexing device by the electric communication cable.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: February 12, 2019
    Assignee: FUJI CORPORATION
    Inventors: Hidekazu Kanai, Nobuo Nagasaka, Shigemoto Hirota
  • Patent number: 10187146
    Abstract: A light converter apparatus can receive a first light beam originated from a first Li-Fi device with a first wavelength. The first light beam may have data encoded therein. The light converter apparatus can receive the first light beam and convert the first wavelength to a second wavelength, and transmit a second light beam with the second wavelength to a second Li-Fi device.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: January 22, 2019
    Assignee: DISH Technologies L.L.C.
    Inventors: Swapnil Anil Tilaye, Nicholas Brandon Newell
  • Patent number: 10171171
    Abstract: Methods and systems for selectable parallel optical fiber and WDM operation may include an optoelectronic transceiver integrated in a silicon photonics die. The optoelectronic transceiver may, in a first communication mode, communicate continuous wave (CW) optical signals from an optical source module to a first subset of optical couplers on the die for processing signals in optical modulators in accordance with a first communications protocol, and in a second communication mode, communicate the CW optical signals to a second subset of optical couplers for processing signals in the optical modulators in accordance with a second communications protocol. Processed signals may be transmitted out of the die utilizing a third subset of the optical couplers. First or second protocol optical signals may be received from the fiber interface coupled to a fourth subset or a fifth subset, respectively, of the optical couplers.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: January 1, 2019
    Assignee: Luxtera, Inc.
    Inventors: Greg Young, Peter DeDobbelaere
  • Patent number: 10158429
    Abstract: In order to suppress the deterioration of receiving characteristics, even in cases where a receiving band of an optical receiver is insufficient with respect to a bit rate of a received signal, an optical receiving apparatus 10 according to the present invention comprises an optical equalizer 20 that provides a light spectrum shaping for spreading an effective band width of an inputted optical signal and an optical receiver 30 that electrically converts and receives the optical signal provided with the light spectrum shaping.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: December 18, 2018
    Assignee: NEC Corporation
    Inventor: Kohei Nakamura
  • Patent number: 10154322
    Abstract: An optical system is provided that converts optical signals received over an optical trunk from a first optical switch to client optical signals intended for a second optical switch. The first and second optical switches operate in accordance with a Fiber Channel (FC) protocol. An interruption of the optical signals on the optical trunk is detected. Responsive to the interruption, a Not Operational State (NOS) message sent to the second optical switch is delayed so as to delay triggering of an FC link initialization in the second optical switch. While the NOS message is delayed, idle messages are sent to the second optical switch.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: December 11, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Giovanni Tandi, Gilberto Loprieno
  • Patent number: 10148386
    Abstract: A communication system includes first and second devices. The first device includes a first transmitter and a first receiver. The first transmitter transmits one data of a first type using one or more first channels over a first communication link to the second device. The first receiver receives one data of a second type, from the second device, using one or more second channels over the first communication link. The second device includes a second transmitter and a second receiver. The second receiver receives the one data of the first type using the one or more first channels over the first communication link, and to generate the one data of the second type based on the one data of the first type. The second transmitter transmits the one data of the second type using one or more second channels over the first communication link to the first device.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: December 4, 2018
    Assignee: International Business Machines Corporation
    Inventors: Alan F. Benner, Douglas M. Freimuth, Benjamin G. Lee, Fabrizio Petrini, Laurent Schares, Clint L. Schow, Mehmet Soyuer
  • Patent number: 10148057
    Abstract: The invention relates to a microchip laser having a monolithic resonator (1) which has a birefringent laser crystal (2), wherein a laser beam (9) decoupled from the resonator, (1) which has a laser wavelength, exits the resonator (1) along a laser beam axis (12) and the length (L) of the resonator (1) is less than 150 ?m based on a direction of the laser beam axis (12). The laser crystal (2) has a thickness (D) based on the direction of the laser beam axis (12) such that, in the case of a light beam (16) having the laser wavelength occurring in the direction of the laser beam axis (12) being incident on the laser crystal (2) between the ordinary and extraordinary beam (17, 19), in which the light beam (16) is divided in the laser crystal (2), a phase shift in the range of ?/2+/??/4 occurs in a single pass through the laser crystal (2).
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: December 4, 2018
    Inventor: Daniel Kopf
  • Patent number: 10142033
    Abstract: Disclosed is a communication apparatus including a synchronization signal detector configured to detect a synchronization signal received from other communication apparatus coupled to the communication apparatus, wherein the other communication apparatus sends a quantum signal generated by a first light source to the communication apparatus, and a second light source configured to generate a decoy signal to be added to a quantum signal that is to be sent to the other communication apparatus according to a result of the detection of the synchronization signal.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: November 27, 2018
    Assignee: Korea Institute of Science and Technology
    Inventors: Sang Wook Han, Sung Wook Moon, Yong Su Kim, Min Ki Woo
  • Patent number: 10142047
    Abstract: An optical transmission apparatus includes a receiver configured to receive a wavelength division multiplexing optical signal including a first optical signal modulated based on a first modulation system and a second optical signal modulated based on a second modulation system with a higher multi-level degree than the first modulation system; a wavelength selective switch configured to attenuate power of the first optical signal to a first level and attenuate power of the second optical signal to a second level lower than the first level; an optical amplifier configured to amplify the wavelength division multiplexing optical signal including the first optical signal and the second optical signal output from the wavelength selective switch; and a transmitter configured to transmit the wavelength division multiplexing optical signal amplified by the optical amplifier.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: November 27, 2018
    Assignee: FUJITSU LIMITED
    Inventor: Yusaku Yamamoto
  • Patent number: 10128941
    Abstract: A method of dimming control for orthogonal frequency division multiplexing (OFDM)-based visible light communication (VLC). The method includes transmitting, by an optical communication device, an optical signal using OFDM with all active sub-carriers when a first dimming level is observed, transmitting, by the optical communication device, the optical signal using OFDM with a first subset of active sub-carriers and without sub-carrier index modulation (SIM) when a second dimming level is observed, wherein the second dimming level is less than the first dimming level; and transmitting, by the optical communication device, the optical signal using OFDM with a second subset of active sub-carriers and with SIM when a third dimming level is observed, wherein the second subset of the active sub-carriers is smaller than the first subset of the active sub-carriers, and wherein the third dimming level is less than the second dimming level.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: November 13, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Dong Wei, Shun Lou, Chen Gong, Nan Wu, Zhengyuan Xu
  • Patent number: 10103813
    Abstract: A system for transmitting data, images, and audio to and from an aerially moved payload, the system having one or more media converters for converting coax signals to fiber signals and at least two wave division multiplexers, one for combining two or more distinct fiber signals into a single fiber signal and one for splitting the two or more combined fiber signals back into two distinct fiber signals. The system also includes at least one line along which one or more of data, images, and audio may be transmitted to and from the aerially moved payload.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: October 16, 2018
    Assignee: CABLECAM, LLC
    Inventor: Stephen Wharton
  • Patent number: 10090641
    Abstract: Described herein are methods, systems, and apparatuses to utilize a semiconductor optical amplifier (SOA) comprising a silicon layer including a silicon waveguide, a non-silicon layer disposed on the silicon layer and including a non-silicon waveguide, first and second mode transition region comprising tapers in the silicon waveguide and/or the non-silicon waveguide for exchanging light between the waveguide, and a plurality of regions disposed between the first and second mode transition regions comprising different cross-sectional areas of the silicon waveguide and the non-silicon waveguide such that confinement factors for the non-silicon waveguide in each of the plurality of regions differ.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: October 2, 2018
    Assignee: Juniper Networks, Inc.
    Inventors: Erik Norberg, Brian R. Koch, Gregory Alan Fish
  • Patent number: 10090960
    Abstract: The prevent invention relates to a method, an apparatus, and a system for processing a flexible-rate signal. The method includes encapsulating a signal from a client side to n optical channel data unit ODU signals, and encapsulating the n ODU signals to a flexible optical channel transport unit OTU signal, where a nominal bit rate of the flexible OTU signal varies according to a value of n and the n is an integer greater than or equal to 1.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: October 2, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Shiyi Cao
  • Patent number: 10070209
    Abstract: The invention relates to an optoelectronic transceiver device comprising a first optical connector (OC1) capable of connection to a first bidirectional optical fiber (OF1), and a second optical connector (OC2) capable of connection to a second bidirectional optical fiber (OF2), the device further comprising: an insertion-extraction module (ADM) capable of: extracting a wavelength (?Rx) from a plurality of wavelengths constituting a first optical signal received by the first optical connector (OC1) and transmitting the first optical signal without the extracted wavelength to the second optical connector (OC2); inserting a wavelength (?Tx) into a second optical signal received by the second optical connector (OC2) and transmitting the second optical signal with the inserted wavelength to the first optical connector (OC1); an electric-optical conversion module (EC1) capable of providing the insertion-extraction module with the wavelength (?Tx) inserted into the second optical signal from an incoming electric sig
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: September 4, 2018
    Assignee: Orange
    Inventor: Philippe Chanclou
  • Patent number: 10069568
    Abstract: A communications system may include an optical source configured to generate an optical carrier signal, a first electro-optic (EO) modulator coupled to the optical source and configured to modulate the optical carrier signal based upon a radio frequency (RF) input, and photonic mixers associated with different respective frequencies across a frequency spectrum and coupled to the optical source and the first EO modulator. The system may further include at least one first opto-electronic (OE) detector coupled to the photonic mixers, and an analog-to-digital converter (ADC) coupled to the at least one OE detector and configured to generate a digital output signal based upon receiving an RF signal via the RF input.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: September 4, 2018
    Assignee: HARRIS CORPORATION
    Inventors: Charles F. Middleton, John R. Desalvo
  • Patent number: 10069585
    Abstract: A transmission device of a signal transmission system multiplexing and transmitting a plurality of 8B10B-coded information sequences, which includes: conversion units the number of which is identical to the number of the information sequences, to perform 8B10B-decoding of each of the information sequences, receive one of the information sequences after the decoding, scramble the received information sequence, and add a synchronous pattern indicating a head of a frame to the scrambled information sequence; and a multiplexing unit to multiplex the information sequence outputted from each of the conversion units.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: September 4, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshiaki Konishi, Kazuo Kubo
  • Patent number: 10063946
    Abstract: A transponder includes a multiplexing section, optical transmitters, optical receivers, an extracting section, and a warning monitor section, wherein the extracting section includes a first signal extracting unit for extracting reception data, a second signal extracting unit for extracting reception data, and a reception signal switching section. When carrier signals are in a link-establishable state, the reception signal switching section supplies reception electric signals generated by the optical receivers to the first signal extracting unit and outputs the reception data. When a carrier signal is in a non-link-establishable state, the reception signal switching section supplies a reception electric signal generated by an optical receiver using a carrier signal in the link-establishable state to the second signal extracting unit and outputs the reception data extracted by the second signal extracting unit.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: August 28, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventor: Mamiko Tanaka
  • Patent number: 10055375
    Abstract: The present invention provides an integrated system-on-chip device. The device is configured on a single silicon substrate member. The device has a data input/output interface provided on the substrate member. The device has an input/output block provided on the substrate member and coupled to the data input/output interface. The device has a signal processing block provided on the substrate member and coupled to the input/output block. The device has a driver module provided on the substrate member and coupled to the signal processing block. The device further includes a driver interface and coupled to the driver module and configured to be coupled to a silicon photonics device. In an example, a control block is configured to receive and send instruction(s) in a digital format to the communication block and is configured to receive and send signals in an analog format to communicate with the silicon photonics device.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: August 21, 2018
    Assignee: INPHI CORPORATION
    Inventors: Siddharth Sheth, Radhakrishnan L. Nagarajan
  • Patent number: 10057668
    Abstract: A network interface device (NID) demarcates an access network and a premises network. The NID receives a broadband signal via an access network and transmits optical device signals to pieces of premises equipment. The broadband signal may be a single-mode fiber (SMF) optical signal transmitted over an SMF cable. In these embodiments, the NID may include a transponder including a first stage to convert the SMF signal to an intermediate electrical signal and a second stage to convert the intermediate electrical signal to a premises optical signal. In other embodiments, the broadband signal may be a very high bit rate digital subscriber line (VDSL) or other type of electrical signal and the NID's transponder may convert the VDSL signal to the premises optical signal. The NID may further include a multiplexer to multiplex the premises optical signal into the optical device signals for delivery to premises devices via corresponding premises device ports and plastic optical fiber cables.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: August 21, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: William E. Rollins, Eric S. Forbes, Arvind Ramdas Mallya
  • Patent number: 10038301
    Abstract: A hybrid laser structure (comprising III-V gain material and a silicon-based photonic integrated circuit) is configured to control the number of generated mode-locked wavelengths by including an optical wavelength filter within the photonic integrated circuit portion of the laser cavity. The optical wavelength filter is used to control the number of comb lines that are supported by the laser cavity, filtering out a set of non-selected mode-locked wavelengths to control the generated number. The optical filter may be passive or active, and the number of generated comb lines may be fixed or adjustable, as desired.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: July 31, 2018
    Assignee: Nokia of America Corporation
    Inventors: Michael S. Eggleston, Guilhem de Valicourt
  • Patent number: 10033466
    Abstract: A signal processing circuit generates first to fourth drive signals to which first to fourth fixed pattern are respectively added. An optical modulators generate a first polarization multiplexed optical signal of a first wavelength from the first and second drive signals and a second polarization multiplexed optical signal of a second wavelength from the third and fourth drive signals. The first to third fixed patterns are the same as one another, and a value of each bit of the fourth fixed pattern is inverted with respect to a value of a corresponding bit of the third fixed pattern. The signal processing circuit generates the first to fourth drive signals such that the first to fourth fixed patterns are transmitted at the same or approximately the same time by the first polarization multiplexed optical signal and the second polarization multiplexed optical signal.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: July 24, 2018
    Assignee: FUJITSU LIMITED
    Inventor: Hiroyuki Irie
  • Patent number: 10020908
    Abstract: In some embodiments, an apparatus includes a first optical transceiver. The first optical transceiver includes a set of optical transmitters, an optical multiplexer operatively coupled to the set of optical transmitters, and a variable optical attenuator operatively coupled to the optical multiplexer. The variable optical attenuator is configured to receive a control signal from a controller of the first optical transceiver and modulate a signal representing control information with an output from the optical multiplexer. The control information is associated with the control signal and for a second optical transceiver operatively coupled to the first optical transceiver.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: July 10, 2018
    Assignee: Juniper Networks, Inc.
    Inventors: Roberto Marcoccia, Theodore J. Schmidt, George R. Sosnowski, Christian Malouin
  • Patent number: 9992160
    Abstract: An optical Internet Protocol (IP) router serves a cell-site over an optical communication network. The optical IP router transmits a network attach request having an optical node name over a control optical wavelength. The optical communication node receives an assignment of a data optical wavelength, a cell-site mode, and an Internet Protocol (IP) address over the control optical wavelength based on the optical node name. The optical communication node operates in the cell-site mode and responsively exchanges cell-site data having the IP address over the data optical wavelength.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: June 5, 2018
    Assignee: Sprint Communications Company, L.P.
    Inventors: Robert Keith Butler, William Alexander James, Lyle T. Bertz
  • Patent number: 9979676
    Abstract: A method for enabling communication between a network element (NE) operating at a bit rate R1 and a NE operating at a bit rate R2 is disclosed. A ratio of R2 to R1 is represented by a ratio M:N, where M and N are positive integers and M>N. Information is received that is associated with distribution of electrical lanes of at least one of a number of M×K NEs operating at bit rate R1. A distribution of the electrical lanes of the at least one M×K NE based on the received information is determined. The electrical lanes of the at least one M×K NE are interconnected with lane ports of at least one M:N electrical interface of N×K transceivers based on the determined distribution. An indication is transmitted identifying the distribution to the at least one M×K NE.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: May 22, 2018
    Assignee: III HOLDINGS 2, LLC
    Inventor: Doron Handelman
  • Patent number: 9977192
    Abstract: An optical receiver including a photodetector and a waveguide is provided. The photodetector includes a plurality of photosensitive regions arranged in an array. The waveguide is disposed on the photodetector and includes a plurality of gratings, a plurality of optical channels, and a plurality of light-deflection elements. The gratings are respectively adapted to collect light beams incident on the waveguide at different angles. The optical channels are adapted to propagate the light beams collected by the gratings. The light-deflection elements are disposed on transmission paths of the light beams propagating in the optical channels and are located above the photosensitive regions. The light-deflection elements are adapted to propagate the light beams propagating in the optical channels to the photosensitive regions. An optical transceiver is also provided.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: May 22, 2018
    Assignee: Industrial Technology Research Institute
    Inventors: Chia-Hsin Chao, Yen-Hsiang Fang, Chun-Hsing Lee, Kai-Ning Ku