Diagnostic Testing Patents (Class 398/9)
  • Patent number: 10419108
    Abstract: An optics module sends, to a host module, a pin signal indicating that an optics module is plugged into the host module, wherein the optics module is configured to operate at at least a first data rate and a second data rate. The optics module receives, from the host module, an indication of a host data rate. The optics module determines whether there is clock and data recovery loss of lock between the first data rate and a host data rate. If it is determined that there is clock and data recovery loss of lock between the first data rate and the host data rate, the optics module initializes at the second data rate if the second data rate matches the host data rate.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: September 17, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Norman Tang, Liang Ping Peng, David Lai, Anthony Nguyen
  • Patent number: 10411807
    Abstract: An optical data transmitter in which surface-coupled reflective electro-absorption modulators are placed into different interferometer arms and operated in a manner that enables the optical data transmitter to transmit an optical output signal modulated using PAM, QPSK, or QAM modulation. In some embodiments, the optical data transmitter is configured to generate a PDM optical output signal by using two such interferometers and a quarter-wavelength plate configured to cause the output polarizations of the two interferometers to be mutually orthogonal. The electro-absorption modulators are surface-coupled in the sense that, in operation, each of these devices receives input light and outputs modulated light along a direction that is substantially orthogonal to the main plane of the device.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: September 10, 2019
    Assignee: NOKIA SOLUTIONS AND NETWORKS OY
    Inventors: Mark P. Earnshaw, Stefano Grillanda
  • Patent number: 10397629
    Abstract: A distribution system and reception apparatus, and methods thereof, are provided for broadcasting and receiving a plurality of first services from a plurality of different broadcast providers, which broadcast a plurality of second services over a plurality of different broadcast channels, on a transition broadcast channel that is different from the plurality of different broadcast channels. The system includes at least one receiver and a transmitter. The at least one receiver is configured to receive the plurality of first services from the plurality of different broadcast providers. The transmitter is configured to broadcast the plurality of first services over the transition broadcast channel.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: August 27, 2019
    Assignee: SATURN LICENSING LLC
    Inventors: Luke Fay, Lachlan Michael
  • Patent number: 10348614
    Abstract: A method is provided that includes accessing, by a debugging device associated with an external user device, (i) a serial console of a hardware network device, and (ii) a management Ethernet port of the hardware network device. The method includes providing, by the debugging device, (i) a serial console interface from the serial console of the hardware network device to the external user device, and (ii) a management Ethernet interface from the management Ethernet port of the hardware network device to the external user device. The method includes receiving, by serial console interface and the management Ethernet interface of the debugging device, user input from the external user device. The method includes sending, using a hardware bypass in the debugging device. Ethernet management traffic from the hardware network device to the external user device through an internal network, responsive to the debugging device improperly operating.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: July 9, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Edward A. Romero
  • Patent number: 10313005
    Abstract: A system for mapping a multilayer network having a server layer and a client layer is provided. The system includes a framework configured for comparing information obtained from a first traffic counter of a client port to information obtained from a second traffic counter of a server port to thereby determine if the client port and the server port are linked.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: June 4, 2019
    Assignee: SEDONASYS SYSTEMS LTD
    Inventors: Yona Shikhmanter, Ornan Alexander Gerstel, Gal Afriat, Vladimir Miliavsky
  • Patent number: 10274169
    Abstract: The present techniques are related to an apparatus for an MEMS LED zoom. The apparatus for includes an LED light source and a collimation lens. The collimation lens to collimate light from the LED light source. The apparatus is also to include an active lens. The active lens to adjust the collimated light from the collimation lens.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: April 30, 2019
    Assignee: Intel Corporation
    Inventor: Mikko Ollila
  • Patent number: 10270527
    Abstract: Methods and associated computer program products for testing optical transmitters are provided. The method includes applying a first constant current input to at least one optical transmitter of a plurality of optical transmitters supported by a substrate where each substrate is received by a socket of a testing board. The method includes monitoring a first output voltage and a first operating temperature of the optical transmitter and includes determining a first voltage pass state or a first voltage fail state of the optical transmitter. The method also includes determining a first temperature pass state or a first temperature fail state of the optical transmitter. The method includes determining a first pass state for the optical transmitter in an instance in which the first voltage pass state and the first temperature pass state are determined.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: April 23, 2019
    Assignee: MELLANOX TECHNOLOGIES, LTD.
    Inventors: Elad Mentovich, Itsik Kalifa, Kfir Margalit
  • Patent number: 10153843
    Abstract: Computer-implemented systems and methods for visually presenting spectrum usage of optical spectrum in an optical network include obtaining spectrum data which defines spectrum usage of optical spectrum associated with the optical network including a plurality of nodes interconnected by a plurality of links; and displaying a circular histogram to visually illustrate the spectrum usage based on the spectrum data, wherein each segment of the circular histogram represents an associated portion of the optical spectrum and a visual indicator in each segment represents usage of the associated portion.
    Type: Grant
    Filed: May 29, 2018
    Date of Patent: December 11, 2018
    Assignee: Ciena Corporation
    Inventors: Simon Brueckheimer, Dave Stacey, Benoît Châtelain
  • Patent number: 9973836
    Abstract: A method may include causing a signal to be transmitted that includes a plurality of wavelengths. The signal may be transmitted via an optical fiber that is associated with a particular wavelength. The particular wavelength may be included in the plurality of wavelengths. The method may include filtering the signal, based on the particular wavelength, to generate a filtered signal. The filtered signal may include the particular wavelength. The method may include detecting the filtered signal in association with the optical fiber. The method may include determining the particular wavelength based on the filtered signal. The method may include storing or providing information identifying at least one of the particular wavelength, the optical fiber, or a transmitter that transmitted the signal.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: May 15, 2018
    Assignee: Juniper Networks, Inc.
    Inventors: Massimiliano Salsi, Domenico Di Mola, Gert Grammel
  • Patent number: 9906289
    Abstract: The present invention relates to distributing and relaying a signal from two or more femtocells to several antennas by using a UTP line. That is, the present invention relates to a dual-band UTP femto distribution/relay device for combining two or more femtocells into a single signal, transmitting the signal through a UTP cable and wirelessly transmitting and receiving the signal remotely with a terminal.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: February 27, 2018
    Assignee: CONTELA, INC.
    Inventor: Min Soo Han
  • Patent number: 9866345
    Abstract: A transmission device for which a work path is established in a first degree and a protection path is established in a second degree includes: a switch equipped with a plurality of optical ports; an optical signal generator, optically connected to a first optical port, and configured to generate an optical signal that is transmitted through the work path; and a monitor light generator, optically connected to a second optical port, and configured to generate monitor light by using a wavelength tunable light source. The monitor light generator controls a wavelength of the monitor light to be substantially the same as a wavelength of the optical signal. The switch guides the optical signal that arrives at the first optical port toward the first degree and guides the monitor light that arrives at the second optical port toward the second degree.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: January 9, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Yuki Ban, Yuji Shimada
  • Patent number: 9847832
    Abstract: A test apparatus and method for testing passive optical networks is provided. The test apparatus includes an optical circuit having an optical coupler for splitting off a portion of optical traffic. During testing of a passive optical network, the optical circuit is coupled into an optical path of the passive optical network. A bit stream corresponding to an activating procedure is captured and analyzed to extract identification information of the module that sent the bit stream.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: December 19, 2017
    Assignee: VIAVI SOLUTIONS DEUTSCHLAND GMBH
    Inventor: Dominik Prause
  • Patent number: 9820007
    Abstract: Producing advanced HFC CATV cable systems while easing the burden of backward compatibility. The system improves CATV data carrying capacity by moving RF QAM modulators from the cable head end to various individually or group addressed optical fiber nodes supplying neighborhood CATV cables, and sending data from the cable head IP backbone to the nodes over optical fiber as IP data packets. For high backward compatibility, the system digitizes legacy RF waveforms, or demodulates legacy QAM waveforms to QAM symbols, also transmits these over the optical fiber as IP data packets, and then reconstitutes back to original waveforms as needed. The system is thus able to easily handle legacy NTSC, FM, QPSK waveforms and do partial (QAM symbol level) compression of legacy QAM waveforms to and from multiple nodes without requiring additional optical fiber wavelengths. The system may use non-standard upstream/downstream CATV frequency splits, filter bank receivers, and FPGA/DSP/ASIC methods.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: November 14, 2017
    Assignee: Alcatel-Lucent USA Inc.
    Inventor: Shlomo Selim Rakib
  • Patent number: 9806803
    Abstract: A frequency offset detection method in an optical spectrum measurement device, implemented by a controller, includes determining a reference optical spectrum based on expected channels and their associated spectral occupancy without extracting any information from actual received optical spectrum; obtaining a measured optical spectrum from the optical spectrum measurement device; and performing a frequency offset control loop using the reference optical spectrum and the measured optical spectrum to correct frequency offset in the optical spectrum measurement device. The optical spectrum measurement device can be an Optical Channel Monitor and the measured optical spectrum can include optical channels partially overlapping one another in Nyquist or in super-Nyquist spacing.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: October 31, 2017
    Assignee: Ciena Corporation
    Inventors: David C. Bownass, Bing Liu, Alex W. Mackay, Choudhury A. Al Sayeed
  • Patent number: 9788088
    Abstract: Example embodiments of the present invention relate to an optical signal processor comprising of at least one wavelength processing device, a plurality of optical amplifying devices, and a least one field programmable photonic device.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: October 10, 2017
    Inventors: Mark E. Boduch, Kimon Papakos
  • Patent number: 9768902
    Abstract: Systems and methods to control optical signals in a spectrally overlapped, flexible grid spectrum system include receiving measured power within a control bandwidth for an optical signal, wherein the control bandwidth is less than a spectral occupancy of the optical signal and equal to or greater than a resolution bandwidth of a measurement device configured to measure the measured power; and controlling the optical signal based on the measured power and a target power within the control bandwidth. The optical signals can include Nyquist spaced or super Nyquist spaced signals in a media-channel.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: September 19, 2017
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Edward Chen, Paul Chedore, Scott Kohlert
  • Patent number: 9756431
    Abstract: A laser-based device or sensor includes: a first laser transmitter having a first self-mix carrier frequency; a second laser transmitter having a second, different, self-mix carrier frequency; a first monitor photodiode to receive a first optical signal from the first laser transmitter, and to output a first electric signal; a second monitor photodiode to receive a first optical signal from the second laser transmitter, and to output a second electric signal; an electric connection to connect together the first electric signal and the second electric signal, forming a combined electric signal; a single laser receiver to receive the combined electric signal and to generate from it a spectrum that corresponds to both (i) optical feedback of the first laser transmitter, and (ii) optical feedback of the second laser transmitter. Alternatively, a single monitor photodiode is used, receiving optical signals from multiple laser transmitters, and outputting a single electric signal to a single laser receiver.
    Type: Grant
    Filed: January 17, 2016
    Date of Patent: September 5, 2017
    Assignee: VOCALZOOM SYSTEMS LTD.
    Inventors: Alexander Blumkin, Amir Ganani, Tal Fishman, Tal Bakish
  • Patent number: 9755755
    Abstract: A laser-based device or sensor includes: a first laser transmitter having a first self-mix carrier frequency; a second laser transmitter having a second, different, self-mix carrier frequency; a first monitor photodiode to receive a first optical signal from the first laser transmitter, and to output a first electric signal; a second monitor photodiode to receive a first optical signal from the second laser transmitter, and to output a second electric signal; an electric connection to connect together the first electric signal and the second electric signal, forming a combined electric signal; a single laser receiver to receive the combined electric signal and to generate from it a spectrum that corresponds to both (i) optical feedback of the first laser transmitter, and (ii) optical feedback of the second laser transmitter. Alternatively, a single monitor photodiode is used, receiving optical signals from multiple laser transmitters, and outputting a single electric signal to a single laser receiver.
    Type: Grant
    Filed: February 7, 2016
    Date of Patent: September 5, 2017
    Assignee: VOCALZOOM SYSTEMS LTD.
    Inventors: Alexander Blumkin, Amir Ganani, Tal Fishman, Tal Bakish
  • Patent number: 9720169
    Abstract: An integrated photonic component (1) is provided with improved centering of an optical field image of a wavelength division multiplexing, WDM, optical output signal and a common output waveguide (8). In this way an efficient power coupling of the laser diodes of the integrated photonic component to the common output waveguide is achievable. Also provided is a photonic integrated circuit, PIC, for use in a WDM optical communication system, the PIC including the integrated photonic component. A method of improving centering of an optical field image of a WDM signal and a common output waveguide of at least one of the integrated photonic component and the PIC are also described.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: August 1, 2017
    Assignee: EFFECT PHOTONICS B.V.
    Inventor: Boudewijn Docter
  • Patent number: 9684192
    Abstract: A semiconductor device that includes an optical resonator spaced from a waveguide structure to provide for evanescent-wave optical coupling therebetween. The optical resonator includes a closed loop waveguide defined by a vertical thyristor structure. In one embodiment, the vertical thyristor structure is formed by an epitaxial layer structure including complementary (both an n-type and a p-type) modulation doped quantum well interfaces formed between an N+ region and a P+ region.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: June 20, 2017
    Assignees: Opel Solar, Inc., THE UNIVERSITY OF CONNECTICUT
    Inventor: Geoff W. Taylor
  • Patent number: 9654850
    Abstract: To provide a wavelength multiplexing device and the like that can effectively identify whether impairment occurs at a location before or after a separation and switching module, a wavelength multiplexing device (100) is connected to one or more optical fiber line systems and to one or more optical transceiver systems and is disposed between the optical fiber lines and optical transceivers so as to input and output optical signals, and is provided with the following: first optical switches (12a-12c) that output an optical signal input from an optical line to an optical transceiver; second optical switches (12d-12f) that output an optical signal input from an optical transceiver to an optical fiber line; and a local optical loopback circuit (13) that feeds back and outputs an optical signal input from an optical transceiver (21-23) to that optical transceiver.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: May 16, 2017
    Assignee: NEC CORPORATION
    Inventor: Yoshiaki Aono
  • Patent number: 9635056
    Abstract: A cable management system includes a cable that transmits data between information handling systems (IHSs). The cable includes a first end and a second end that is opposite the cable from the first end. A first connector is located on the first end of the cable and couples the cable to a first IHS. A second connector is located on the second end of the cable and couples the cable to a second IHS. A first communication system is located adjacent the first end of the cable. The first communication system receives and stores first IHS information about the first IHS when the first connector is coupled to the first IHS and second IHS information about the second IHS when the second connector is coupled to the second IHS. The first communication system may then provide the first and second IHS information to a management device.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: April 25, 2017
    Assignee: Dell Products L.P.
    Inventor: David Matthew Warden
  • Patent number: 9602219
    Abstract: An optical system includes an optical transmitter configured to modulate an optical signal to carry data, associated with an optical channel, via multiple sub-carriers in a quantity greater than four. The optical system further includes an optical receiver configured to demodulate the optical signal to recover the data from the multiple sub-carriers.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: March 21, 2017
    Assignee: Infinera Corporation
    Inventors: Han H. Sun, Yuejian Wu, Kuang-Tsan Wu
  • Patent number: 9577749
    Abstract: A test apparatus and method for testing passive optical networks is provided. The test apparatus includes an optical circuit having an optical coupler for splitting off a portion of optical traffic. During testing of a passive optical network, the optical circuit is coupled into an optical path of the passive optical network. A bit stream corresponding to an activating procedure is captured and analyzed to extract identification information of the module that sent the bit stream.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: February 21, 2017
    Assignee: VIAVI SOLUTIONS DEUTSCHLAND GMBH
    Inventor: Dominik Prause
  • Patent number: 9571198
    Abstract: An optical transceiver comprises a transmitter configured to transmit a first signal, and a receiver coupled to the transmitter and configured to receive a first compensation, wherein the first compensation is based on a pattern-dependent analysis of the first signal, and provide the first compensation to the transmitter, wherein the transmitter is further configured to compensate a second signal based on the first compensation to form a first compensated signal, and transmit the first compensated signal. An optical transmitter comprises a digital signal processor (DSP) comprising a compensator, a digital-to-analog converter (DAC) coupled to the DSP, a radio frequency amplifier (RFA) coupled to the DAC, and an electrical-to-optical converter (EOC) coupled to the RFA. An optical receiver comprises an optical-to-electrical converter (OEC), an analog-to-digital converter (ADC) coupled to the OEC, and a digital signal processor (DSP) coupled to the ADC and comprising a calibrator.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: February 14, 2017
    Assignee: Futurewei Technologies, Inc.
    Inventors: Clarence Kan, Fei Zhu, Zhihong Li
  • Patent number: 9571187
    Abstract: A wavelength-division multiplexing optical communication system and a method for measuring optical performance of an output signal for the system. The optical communication system includes: a service-provider device; a local node; and a plurality of subscriber devices. The service-provider device includes: a plurality of first optical transceivers; a first optical multiplexer/demultiplexer (OD/OM) connected to the plurality of first optical transceivers; and a seed-light source providing seed light. Each subscriber device includes a second optical transceiver. The local node connects the service-provider device and the plurality of subscriber devices to each other using a DWDM link comprising: a second multiplexer/demultiplexer (OD/OM); and a single-mode optical fiber for transmission. Here, the optical intensity of an output signal of the second optical transceiver is determined by compensating for the value of the loss caused when the output signal passes through the second OD/OM of the local node.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: February 14, 2017
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Han-Hyub Lee, Jie-Hyun Lee, Eon-Sang Kim, Sang-Soo Lee
  • Patent number: 9497517
    Abstract: A scalable AWGR-based optical switching fabric and its scheduling method are presented. The switching fabric consists of three stages: two stages (first and third) of AWGRs interconnected by a second stage of optical space switches. The optical switching system is named ASA for the technologies used to construct the three stages: AWGR, Space switching, and AWGR. The first stage and third stage portions of the switching fabric comprise up to N N×N AWGRs (N inputs and N outputs) and the middle stage N N×N optical space switches, wherein N is an odd integer. This makes the switch's total port count N2. Each port can transmit up to N packets of different wavelengths simultaneously. Thus the total capacity of the switch is around (N3×bandwidth of one wavelength channel).
    Type: Grant
    Filed: November 1, 2014
    Date of Patent: November 15, 2016
    Inventor: Chin-Tau Lea
  • Patent number: 9444572
    Abstract: A transmission device includes: optical transmitters configured to transmit optical signals of different wavelengths; optical couplers configured to multiplexing the optical signals transmitted from the optical transmitters; and a wavelength selective switch configured to multiplex multiplexed optical signals obtained by multiplexing by the couplers, wherein optical signals, a wavelength interval between which is less than a predetermined value, are transmitted to separate optical couplers of the optical couplers, among the optical signals.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: September 13, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Tomohiro Kaneoka, Norifumi Shukunami, Hiroki Oi
  • Patent number: 9389949
    Abstract: A system and method are disclosed for measurement and reporting of signal quality in an optical data link in terms of Bit Error Rate (BER). The system and method of optical fiber signal quality measurement is highly accurate in early determination of signal degradation, is computationally simple in implementation, and is immune to instability with variable temperature and other environmental factors. Counting a number of error free Cyclic Redundancy Checks (CRC) of a plurality of video signals, the computationally simple method limits the data analysis required to determine a link OK, a link degraded and a link fault status of the optical data link.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: July 12, 2016
    Assignee: Rockwell Collins, Inc.
    Inventor: Thomas B. Campbell
  • Patent number: 9288558
    Abstract: A control module for an optical switch node, comprising a TIM having a plurality of operating modes in which a first mode is identified by a first byte sequence; a communication interface unit transmitting a second byte sequence for placing the TIM in the first mode, the first byte sequence different from the second byte sequence, and a gate array receiving the second byte sequence, storing a list of predetermined unique values, each value indicative of a particular operating mode command, receiving at least a portion of the second byte sequence and receiving instructions to apply an algorithm to at least a portion of the second byte sequence to transform the portion into a checksum value, comparing the checksum value to the list to determine the operating mode command, and transmitting the first byte sequence to the TIM to place the TIM into the first mode.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: March 15, 2016
    Assignee: Infinera Corporation
    Inventors: Soven Kumar Dana, Chander Prakash Singh Dogra, Sandeep Kumar, Eric Heistermann
  • Patent number: 9240666
    Abstract: An optical amplification device includes: an optical module that outputs an amplified light; and a controller that makes the optical module emit a light when an emission command is input into the controller, wherein the controller cancels an inputting of the emission command until a predetermined time passes, when a protection for forbidding a light emission of the optical module is canceled.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: January 19, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Mitsuya Kawashita, Jinlin Zhang, Eiji Maeda, Shota Mori
  • Patent number: 9179204
    Abstract: A normal system OSU, a redundancy system OSU, an optical switch, a concentration switch, and a controller which detects a command input by operation control and performs control according to the command are provided, and in such a state that the controller detects a redundancy system switching command indicating that the normal system OSU is switched to the redundancy system OSU, the controller induces the concentration switch to change a storage destination of a down signal, instructs the normal system OSU which is the switching source OSU to stop transmission of a transmission permission message, instructs the optical switch to switch a path after receiving remaining data processing completion notifications from the concentration switch and the normal system OSU which is the switching source OSU, writes accumulated information about the normal system OSU, which is the switching source OSU, in the redundancy system OSU, and notifies the concentration switch of completion of switching, whereby a down signal i
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: November 3, 2015
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takashi Mitsui, Youichi Fukada, Takeshi Sakamoto, Naoto Yoshimoto
  • Patent number: 9158072
    Abstract: An optical switch configured to switch optical beams between one or more first ports and two or more second ports includes a wavelength independent beam splitter that simultaneously splits the optical beams from each of the first ports into a plurality of separate sub beams. A reflective wavelength independent switching unit selectively reflectively direct each the sub beam along respective predetermined trajectories such that predetermined sub beams are coupled between the first and second ports. The switching unit includes one independently switchable reflective element corresponding to each second port where each switchable reflective element is switchable between a plurality of preselected switching states and each switching state defines a trajectory of each of the sub beam. The beam splitter and the switching unit are configured to direct the sub beams along substantially free space trajectories unconfined to waveguides.
    Type: Grant
    Filed: October 27, 2012
    Date of Patent: October 13, 2015
    Assignee: Finisar Corporation
    Inventors: Steven James Frisken, Thomas Killin
  • Patent number: 9152441
    Abstract: Systems and methods for virtual machine host isolation are disclosed. According to one implementation, an illustrative system may include a first compute node configured to be operatively coupled to a second compute node via a first application server, and to a third compute node via a second application server. In operation, the first compute node may be configured to receive an instruction from the second compute node via the first server to define a virtual machine, and send an instruction to the third compute node via the second server to define the virtual machine.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: October 6, 2015
    Assignee: Virtustream Canada Holdings, Inc.
    Inventor: Derek Anderson
  • Patent number: 9148676
    Abstract: A distribution system and reception apparatus, and methods thereof, are provided for broadcasting and receiving a plurality of first services from a plurality of different broadcast providers, which broadcast a plurality of second services over a plurality of different broadcast channels, on a transition broadcast channel that is different from the plurality of different broadcast channels. The system includes at least one receiver and a transmitter. The at least one receiver is configured to receive the plurality of first services from the plurality of different broadcast providers. The transmitter is configured to broadcast the plurality of first services over the transition broadcast channel.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: September 29, 2015
    Assignee: SONY CORPORATION
    Inventors: Luke Fay, Lachlan Michael
  • Patent number: 9143228
    Abstract: A small form factor pluggable (SFP) device has an embedded optical time domain reflectometer (OTDR) for detecting anomalies along an optical fiber. The SFP device has a plurality of optical subassemblies (OSAs) that are used to transmit an optical data signal at a first wavelength, transmit an optical OTDR signal at a second wavelength, and receive an optical data signal at a third wavelength. The OTDR signal is effectively isolated from the data signals based on wavelength, and samples of returns of the OTDR signal are analyzed to detect at least one anomaly along the optical fiber.
    Type: Grant
    Filed: March 6, 2013
    Date of Patent: September 22, 2015
    Assignee: ADTRAN, Inc.
    Inventor: Leif J. Sandstrom
  • Patent number: 9118388
    Abstract: A network element comprising a phase matched or phase controlled interconnect configured to receive a data signal sample, a Raman equalization transmitter, and a Raman crosstalk equalization conditioning circuit configured to generate a Raman mitigation signal using the data signal sample to be transmitted by the Raman equalization transmitter. Included is a method comprising multiplexing incoherent data signals with a video signal and a Raman mitigation signal to be co-propagated on a single optical fiber, wherein the Raman mitigation signal is selected to destructively interfere with Raman crosstalk noise induced on the video signal. Also included is a system comprising a video signal component configured to transmit a video signal, data stream signal components configured to transmit a data stream signals, a Raman crosstalk equalization system configured to transmit a Raman mitigation signal, and an optical multiplexer configured to multiplex the signals for co-propagation onto a single transmission fiber.
    Type: Grant
    Filed: April 13, 2013
    Date of Patent: August 25, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventors: Frank Effenberger, Kerry I. Litvin
  • Patent number: 9042723
    Abstract: An apparatus and method for fault indication and localization in a Passive Optical Network (PON) comprising a multistage power splitter (100, 200, 300) with at least one 1:N splitter (120, 221, 222, 321, 322) followed by N items of 2:M splitters (131, 132, 231-233, 331-336), wherein N and M are integers greater than 1. The apparatus also comprises an Optical Time Domain Reflectometry (OTDR) device (110, 210, 310) capable of inserting an OTDR signal into the power splitter (100, 200, 300), and adapted to insert the OTDR signal between the first stage of the at least one 1:N splitter (120, 221, 222, 321, 322) and the second N items of 2:M splitters (131, 132, 231-233, 331-336).
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: May 26, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Stefan Dahlfort
  • Patent number: 9014551
    Abstract: The method and apparatus as disclosed herein allows the user to input conditions for a communications link, set characteristic values of a photon-counting detector array, simulate the resulting link, observe a summary analysis of the simulated detector and link activity, and extract a record of the detector activity (e.g. each photon counted) making it available for further analysis.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: April 21, 2015
    Assignee: The United States of America as Represented by the Secretary of the Air Force
    Inventor: Adam M. Stooke
  • Patent number: 9002203
    Abstract: A method for data processing of an optical network element is provided, wherein a configuration information is received at the optical network element and a light signal is adjusted to a wavelength or wavelength range indicated by said configuration information; wherein an incoming optical signal is demodulated via the light signal and mixed as an electrical demodulated signal with a signal of an oscillator; wherein the signal of the oscillator is tuned to improve a reception of the incoming signal at the optical network element; and wherein the light signal is used for upstream modulation to provide a modulated optical upstream signal. Furthermore, an according device and a communication system are suggested including at least one such device.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: April 7, 2015
    Assignee: Xieon Networks S.a.r.l.
    Inventors: Thomas Treyer, Karl Kloppe, Harald Rohde
  • Patent number: 8995828
    Abstract: An optical transmission device includes an extractor that extracts respective optical signals from optical signals multiplexed from a plurality of optical signals of different wavelengths, a detector that detects wavelengths of the extracted respective optical signals, a storage that stores the wavelengths of the detected respective optical signals, and a processor that is operative to derive trends in wavelength variation of the respective optical signals based on the detected respective optical signals and the respective optical signals stored in the storage, and determines that either one or both of the extractor and the detector cause the wavelengths to be varied when the trends in wavelength variation of two or more wavelengths are the same.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: March 31, 2015
    Assignee: Fujitsu Limited
    Inventors: Yuichi Suzuki, Toshihiro Ohtani
  • Patent number: 8989587
    Abstract: Methods, algorithms, architectures, circuits, and/or systems for determining the status of parameters associated with optical transceiver operation are disclosed. The method can include (a) accessing and/or monitoring parametric data for each of a plurality of parameters that are related to operation of the optical transceiver; (b) storing the parametric data in one or more memories; (c) comparing the parametric data for each of the plurality of parameters against at least one of a corresponding plurality of predetermined thresholds; and (d) generating one or more states indicating whether the parametric data for a unique one of the parameters has crossed one or more of the corresponding plurality of predetermined thresholds. The invention also relates to an optical triplexer, comprising the described optical transceiver.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: March 24, 2015
    Assignee: Source Photonics, Inc.
    Inventors: Todd Rope, Mark Heimbuch
  • Patent number: 8983298
    Abstract: An optical channel monitor includes: a first optical device to include first, second and third optical ports, light input through the first optical port being led to the second optical port, light input through the second optical port being led at least to the third optical port; a second optical device to include fourth, fifth and sixth optical ports, light input through the fourth optical port being led to the fifth optical port, light input through the fifth optical port being led at least to the sixth optical port; an optical filter to include seventh and eighth optical ports optically connected to the second and fifth optical ports, respectively, a specified wavelength being transmitted between the seventh and eighth optical ports; a first photo detector to detect light output from the sixth optical port; and a second photo detector to detect light output from the third optical port.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: March 17, 2015
    Assignee: Fujitsu Limited
    Inventor: Norifumi Shukunami
  • Patent number: 8983287
    Abstract: A personnel monitoring system. The personnel monitoring system includes a host node having an optical source for generating optical signals, and an optical receiver. The personnel monitoring system also includes a plurality of fiber optic sensors for converting at least one of vibrational and acoustical energy to optical intensity information, each of the fiber optic sensors having: (1) at least one length of optical fiber configured to sense at least one of vibrational and acoustical energy; (2) a reflector at an end of the at least one length of optical fiber; and (3) a field node for receiving optical signals from the host node, the field node transmitting optical signals along the at least one length of optical fiber, receiving optical signals back from the at least one length of optical fiber, and transmitting optical signals to the optical receiver of the host node.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: March 17, 2015
    Assignee: US Seismic Systems, Inc.
    Inventors: Eric Lee Goldner, Gerald Robert Baker, James Kengo Andersen, Agop Hygasov Cherbettchian, Jeffrey Carl Buchholz
  • Patent number: 8971704
    Abstract: An optical network (1) comprising an optical network element (10) comprising a first optical transmitter (14), a first controller (16), a first optical receiver and a second optical receiver and a second optical network element (12). There is provided a transmission path (30) between said first optical network element and said second optical network element. Said first optical transmitter is arranged to generate and transmit a first optical signal. Said first controller is arranged to control said first optical transmitter to generate and transmit said first optical signal at a wavelength selected from a predetermined plurality of wavelengths. Said first optical receiver is arranged to detect a backscatter portion of said first optical signal returned to said first optical network element along said transmission path by distributing scattering.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: March 3, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Fabio Cavaliere, Luca Giorgi, Renato Grosso, Ernesto Ciaramella
  • Patent number: 8965200
    Abstract: A method, an apparatus and a system for detecting a connection status of an optical fiber jumper are provided in the embodiments of the present invention. The method for detecting a connection status of an optical fiber jumper includes: judging a connection status of a second port and a first port according to whether an optical signal sent by the first port to the second port through a first optical fiber is received, wherein the first optical fiber is connected to two ends of an optical fiber jumper, and the two ends of the optical fiber jumper are connected to the first port and the second port respectively; and obtaining a port identification corresponding to the first port according to the optical signal if the optical signal is received.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: February 24, 2015
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yunsheng Wen, Jun Zhao, Bo Wang, Xiaolei Shan
  • Patent number: 8948586
    Abstract: There are disclosed systems and methods for detecting whether an Optical Network Unit (ONU) in a network may be causing a communications interference due to laser overlap. In one embodiment, an Optical Line Terminal (OLT) selects a pair of ONUs suspected of possibly causing laser overlap. The OLT then grants a first window to a first ONU for transmitting a first message, and grants to another ONU different from the pair of ONUs a second window for transmitting a second message. If the first message is not received by the OLT, then the OLT indicates that the first ONU may be causing laser overlap. In another embodiment, the OLT grants to an ONU a window for transmitting a message to the OLT. If the message is not received by the OLT when expected, then the OLT indicates that the ONU may be causing laser overlap. Other embodiments are disclosed.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: February 3, 2015
    Assignee: Cortina Access, Inc.
    Inventors: Dongsheng Zhang, Eugene W. Lee, Wei Yao
  • Patent number: 8948005
    Abstract: Techniques are described for determining the topology of an optical network. A computing device receives a message on a data communication network after a first device in an optical network receives an optical pulse pattern on an optical fiber in the optical network. The computing device generates topology data using the message. The topology data indicates that a second device is physically connected in the optical network to the first device when the received optical pulse pattern matches an optical pulse pattern sent by the second device.
    Type: Grant
    Filed: November 3, 2011
    Date of Patent: February 3, 2015
    Assignee: Juniper Networks, Inc.
    Inventor: Grammel Gert
  • Patent number: 8934769
    Abstract: An optical transport network signal (OTM) comprising at least one optical channel is received at a first network equipment. The optical transport network signal (OTM) is processed to extract optical data units (ODUk) for each optical channel (OCh). There is detection for defects during the processing. The optical data units are retransmitted within optical transport units (OTUk) towards a second network equipment. When a defect has been detected, the retransmitting comprises inserting an optical channel transport unit alarm indication signal (OTUk-AIS) in an optical channel transport unit (OTUk) containing optical channel data units (ODUk) that are affected by the detected defect.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: January 13, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Orazio Toscano, Sergio Lanzone
  • Patent number: 8929731
    Abstract: An apparatus for measuring performance of a coherent optical receiver includes a beam splitter splitting light into first and second paths, a first optical modulator modulating the first path light, a variable optical attenuator controlling an optical power of the first optical modulator, a first polarization controller transmitting a signal controlling polarization of an output of the variable optical attenuator to the coherent optical receiver, a second optical modulator modulating the second path light, a variable optical delay line delaying time of an output of the second optical modulator, a second polarization controller transmitting a signal controlling polarization of an output of the variable optical delay line to the coherent optical receiver, a network analyzer measuring performance of the coherent optical receiver and controlling the optical modulators, and a controller transmitting a control signal to the optical modulators.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: January 6, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Chun Ju Youn, Joong-Seon Choe, Jong-Hoi Kim, Duk Jun Kim, Yong-Hwan Kwon, Eun Soo Nam