Patents Examined by Agustin Bello
  • Patent number: 11032737
    Abstract: Methods and apparatus for reducing and/or canceling signal interference between receiver and transmitter components of a wireless communications device are described. The methods and apparatus are well suited for use in a wide range of devices including user equipment devices such as cell phones as well as in network equipment such a base stations. Opto-mechanical devices are used in some embodiments as part of an apparatus which performs interference cancelation on RF (Radio Frequency) signals.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: June 8, 2021
    Assignee: GenXComm, Inc.
    Inventors: Hardik Jain, Che-Chun Lin
  • Patent number: 11032003
    Abstract: Devices, computer-readable media and methods are disclosed for determining reachability for a wavelength connection in a telecommunication network. For example, a processor deployed in a telecommunication network may calculate a fiber loss on a link in the telecommunication network using optical power measurements and determine that a destination node of a wavelength connection is not reachable via a path that includes the link based upon the fiber loss of the link that is calculated. In one example, the determining is based upon a number of links in the path, an effective fiber loss for each link in the path, a penalty for nodes in the path, and an acceptable loss value. The processor may further perform a remedial action in response to determining that the destination node of the wavelength connection is not reachable via the path.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: June 8, 2021
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Sheryl Woodward, Kathleen Tse, Martin Birk, Angela Chiu, Balagangadhar Bathula
  • Patent number: 11022767
    Abstract: The present disclosure provides a TO-CAN cap. The TO-CAN cap includes a casing, the casing has a hollow cylindrical structure, and an inner wall of the casing has a protrusion portion at a first end portion in an axial direction of the casing; and an optical lens, the optical lens has an optical portion for refracting light and a rib portion at a periphery of the optical portion, a side surface of the rib portion having a concave portion complementary to the protrusion portion, where the casing and the optical lens are connected to each other through the protrusion portion and the concave portion.
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: June 1, 2021
    Assignee: Zhejiang Sunny Optical Co., Ltd
    Inventors: Qing Zhao, Lingwei Chen, Litong Song, Yinfang Jin
  • Patent number: 11025344
    Abstract: An injection locked transmitter for an optical communication network includes a master seed laser source input substantially confined to a single longitudinal mode, an input data stream, and a laser injected modulator including at least one slave laser having a resonator frequency that is injection locked to a frequency of the single longitudinal mode of the master seed laser source. The laser injected modulator is configured to receive the master seed laser source input and the input data stream, and output a laser modulated data stream.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: June 1, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle
  • Patent number: 11016253
    Abstract: An optical coupler comprises an adiabatic waveguide structure having a proximal end and a distal end, with the adiabatic waveguide structure comprising: a first waveguide comprising an input section at the proximal end; a first coupling section contiguous with the input section and extending toward the distal end; and a first laterally displaced section contiguous with the first coupling section. The first waveguide narrows along the first coupling section, from the input section to the first laterally displaced section. A second waveguide is separate from the first waveguide and comprises a second laterally displaced section adjacent to the proximal end; a second coupling section contiguous with the second laterally displaced section and extending toward the distal end; and an output section contiguous with the second coupling section. The second waveguide widens along the second coupling section, from the second laterally displaced section to the output section.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: May 25, 2021
    Assignee: Honeywell International Inc.
    Inventors: Matthew Wade Puckett, Neil A. Krueger
  • Patent number: 11005573
    Abstract: A system and method for controlling optical receiver operation in response to a received optic signal power level that includes providing an optic signal receiver having operation determined by one or more system settings. During operation, the optic signal is received and converted to an electrical signal. The electrical signal is evaluated to determine a power level of the electrical signal. Responsive to the power level of the electrical signal exceeding a first predetermined threshold, adjusting a first system setting and responsive to the power level of the received electrical signal decreasing below a second predetermined threshold, adjusting the first system setting. Then, responsive to the power level of the received electrical signal exceeding a third predetermined threshold, adjusting a second system setting and responsive to the power level of the received electrical signal decreasing below a fourth predetermined threshold, adjusting the second system setting.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: May 11, 2021
    Assignee: MACOM Technology Solutions Holdings, Inc.
    Inventors: Vasilis Papanikolaou, Jeffrey Allen
  • Patent number: 10999656
    Abstract: This disclosure describes devices and methods related to multiplexing optical data signals. A method may be disclosed for multiplexing one or more optical data signals. The method may comprise receiving, by a dense wave division multiplexer (DWDM), one or more optical data signals. The method may comprise combining, by the DWDM, the one or more optical data signals. The method may comprise outputting, by the DWDM, the combined one or more optical data signals to one or more wave division multiplexer (WDM). The method may comprise combining, by the one or more WDM, the combined one or more optical data signals and one or more second optical data signals, and outputting an egress optical data signal comprising the combined one or more optical data signals and one or more second optical data signals.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: May 4, 2021
    Assignee: Cox Communications, Inc.
    Inventors: Harjinder S. Ghuman, Jeffrey L. Finkelstein, David Job, Robert Kuse, Christopher Palmquist
  • Patent number: 10979141
    Abstract: An optical line terminal receives a sequence of optical power test transmissions from an optical network unit, wherein the sequence of optical power test transmissions includes a first plurality of consecutive optical transmissions, a second plurality of consecutive optical transmissions, and a third plurality of consecutive optical transmissions. The optical line terminal decides whether the optical network unit is malfunctioning based on an extinction ratio and an average transmit power, wherein the extinction ratio is based on the first plurality of consecutive optical transmissions and the second plurality of consecutive optical transmissions, and the average transmit power is based on the third plurality of consecutive optical transmissions.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: April 13, 2021
    Assignee: Nokia Technologies Oy
    Inventors: Joseph Smith, Roy Tebbe
  • Patent number: 10965378
    Abstract: Techniques are described for implementing an out-of-band communication channel used to exchange control channel information in sub-carrier-based optical communication systems. In an example implementation, an apparatus includes an optical tap coupled to an optical communication path carrying a modulated optical signal carrying a plurality of optical subcarriers. The optical tap has a first output configured to supply a first portion of the modulated optical signal and a second output configured to supply a second portion of the modulated optical signal. The plurality of optical subcarriers are amplitude modulated based on control data at a first frequency, and each of the plurality of optical subcarriers is modulated to carry user data at a second frequency greater than the first frequency. The apparatus is configured to supply the control based on the first portion of the modulated optical signal.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: March 30, 2021
    Assignee: Infinera Corporation
    Inventors: Amir Jafari, Steven J. Hand, Mohamed Osman
  • Patent number: 10958371
    Abstract: An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength signal.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: March 23, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle
  • Patent number: 10958341
    Abstract: The present invention provides systems and methods for providing geolocation services in a mobile-based crowdsourcing platform. More specifically, the system of the present invention includes a plurality of remote mobile devices and a visible light communication (VLC) enabled lighting system configured to communicate and exchange data with a cloud-based service, such as a crowdsourcing platform. The crowdsourcing platform generally provides a geolocation service based on the crowdsourcing, or polling, of users of the mobile devices, in addition to VLC data captured by the VLC-enabled lighting system, so as to determine location and movement of the users within a specific environment. The system is further configured to automatically render a floor plan or layout of a location based on the user data and VLC data.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: March 23, 2021
    Inventors: Abdullah Daoud, B. Eric Graham
  • Patent number: 10951003
    Abstract: A light source based on integrated silicon photonics includes a die of a silicon substrate having at least one chip site configured with a surface region, a trench region, and a first stopper region located separately between the surface region and the trench region. The trench region is configured to be a depth lower than the surface region. The light source includes a laser diode chip having a p-side facing the chip site and a n-side being distal to the chip site. The p-side includes a gain region bonded to the trench region, an electrode region bonded to the surface region, and an isolation region engaged with the stopper region to isolate the gain region from the electrode region. The light source also includes a conductor layer in the die configured to connect the gain region to an anode electrode and separately connect the electrode region to a cathode electrode.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: March 16, 2021
    Assignee: INPHI CORPORATION
    Inventors: Xiaoguang He, Radhakrishnan L. Nagarajan
  • Patent number: 10930992
    Abstract: Aspects of the subject disclosure may include, a system for receiving electromagnetic waves that propagate along a transmission medium, generating, according to the electromagnetic waves, first signals and second signals, wirelessly providing, via a short-range dielectric antenna of the waveguide system, the first signals to a base station device, and wirelessly providing, via an array of dielectric antennas of the waveguide system, the second signals to a communication device remotely located from the waveguide system. Other embodiments are disclosed.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: February 23, 2021
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Farhad Barzegar, Paul Shala Henry, Giovanni Vannucci, Peter Wolniansky, Thomas M. Willis, III, Robert Bennett, Irwin Gerszberg, Donald J. Barnickel
  • Patent number: 10917179
    Abstract: An optical system for responding to distortions in incident light in a free space optical communication system includes a machine learning output storing at least an indication of multiple images and corresponding positioning or orientation attributes for one or more optical elements; a sensor configured to generate an image; and a component configured to adjust the one or more optical elements based on the generated image. Various other methods, systems, and apparatuses are also disclosed.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: February 9, 2021
    Assignee: Facebook, Inc.
    Inventors: Konstantin Kudinov, Amy Zhang, Tobias Gerard Tiecke, Kevin Michael Birnbaum
  • Patent number: 10917172
    Abstract: A light source outputs a light. A branching unit branches the light output from the light source into a first branched light and a local oscillation light. A modulator modulates the first branched light to output an optical signal. A receiver causes the local oscillation light to interfere with an optical signal to receive the optical signal. An EDFA amplifies the optical signal output from the modulator. An excitation light source outputs an excitation light exciting the EDFA to the EDFA. An optical attenuator attenuates optical power of the optical signal amplified by the EDFA. A control unit controls attenuation of the optical signal in the optical attenuator. The control unit adjusts the attenuation of the optical signal and adjusts an output of the excitation light from the excitation light source.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: February 9, 2021
    Assignee: NEC Corporation
    Inventor: Isao Tomita
  • Patent number: 10917173
    Abstract: Communication bottlenecks, particularly in the downlink direction, are a common problem for many CubeSat developers. As described herein, a CubeSat module for a CubeSat comprises an optical transmitter to transmit data to a remote terminal, a receiver to acquire an optical beacon from a remote terminal, and a fine-pointing module operably and directly coupleable to a coarse-pointing module of the CubeSat. The fine-pointing module is configured to point the optical transmitter toward the remote terminal with an accuracy range that overlaps with an accuracy range of the coarse-pointing module of the CubeSat so as to establish a communications link between the CubeSat and the remote terminal over a low-Earth-orbit (LEO) distance.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: February 9, 2021
    Assignee: Massachusetts Institute of Technology
    Inventors: Ryan Wallace Kingsbury, Kathleen Michelle Riesing, Kerri Cahoy, Tam Nguyen Thuc Nguyen, David O. Caplan
  • Patent number: 10911093
    Abstract: Embodiments described and shown provide a signal transmission method, a signal receiving method, a related device, and a system. The signal transmission method includes: generating a single-wavelength optical carrier; splitting the single-wavelength optical carrier into N subcarriers having a same wavelength; generating a spreading code corresponding to each of the subcarriers to obtain N spreading codes, where a bandwidth of each of the spreading codes is less than or equal to a preset threshold; deserializing a to-be-transmitted data signal into N sub-data signals; modulating the N subcarriers based on the N sub-data signals and the N spreading codes, to obtain N modulation signals; and combining the N modulation signals into one combined signal, and outputting the combined signal.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: February 2, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Yi Yu, Yuanda Huang, Liangchuan Li
  • Patent number: 10911153
    Abstract: To provide a photodetector which enables reception of massively parallel optical communication, and with which a large volume of data for multi-mode transmission or multi-core transmission can be received instantaneously at once. A photodetector comprising a two-dimensional photodetector array in which a plurality of photodetectors 9 are arranged in a two-dimensional array, and which includes a wire 12 having a width of not more than 4 ?m between the plurality of photodetectors. Each of the photodetectors has a light reception area with a side measuring not more than 100 ?m. The plurality of photodetectors arranged in a two-dimensional array are spaced apart from each other by not less than 20 ?m.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: February 2, 2021
    Assignee: National Institute of Information and Communications Technology
    Inventors: Toshimasa Umezawa, Takahide Sakamoto, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi
  • Patent number: 10904647
    Abstract: An optical access network includes an optical hub having at least one processor. The network further includes a plurality of optical distribution centers connected to the optical hub by a plurality of optical fiber segments, respectively, and a plurality of geographic fiber node serving areas. Each fiber node serving area of the plurality of fiber node serving areas includes at least one optical distribution center of the plurality of optical distribution centers. The network further includes a plurality of end points. Each end point of the plurality of end points is in operable communication with at least one optical distribution center. The network further includes a point-to-point network provisioning system configured to (i) evaluate each potential communication path over the plurality of optical fiber segments between a first end point and a second end point, and (ii) select an optimum fiber path based on predetermined path selection criteria.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: January 26, 2021
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Luis Alberto Campos, Zhensheng Jia, Carmela Stuart
  • Patent number: 10897312
    Abstract: A data transmission method, device, and system includes, when a preset condition is met, determining a quantity N of first symbols included in one first symbol group and a quantity K of bits transmitted in the first symbol group, where the preset condition is ? log2 mN?>N·? log2 m?, K=? log2 mN?, m?2, N?2, and K?3; obtaining X data blocks, where each of the first X?1 data blocks includes K bits, the last data block includes Y bits, X?1, and K?Y?1; and processing each of the X data blocks into N first symbols to obtain NX first symbols, and sending the NX first symbols.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: January 19, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Tong Jiang, Pengfei Luo