Semiconductor Patents (Class 359/344)
  • Patent number: 12140824
    Abstract: A light modulator for amplifying an intensity of incident light and modulating a phase of the incident light is provided. The light modulator includes: a first distributed Bragg reflector (DBR) layer having a first reflectivity and comprising at least two first refractive index layers that have different refractive indices from each other and are repeatedly alternately stacked; a second DBR layer having a second reflectivity and comprising at least two second refractive index layers that have different refractive indices from each other and are repeatedly alternately stacked; and an active layer disposed between the first DBR layer and the second DBR layer, and comprising a quantum well structure.
    Type: Grant
    Filed: June 16, 2022
    Date of Patent: November 12, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Duhyun Lee, Changgyun Shin, Sunil Kim, Junghyun Park, Byunggil Jeong
  • Patent number: 12136951
    Abstract: An coherent transceiver includes a single silicon photonics substrate configured to integrate a laser diode chip flip-mounted and coupled with a wavelength tuning section to provide a laser output with tuned wavelengths which is split in X:Y ratio partly into a coherent receiver block as local-oscillator signals and partly into a coherent transmitter block as a light source. The coherent receiver includes a polarization-beam-splitter-rotator to split a coherent input signal to a TE-mode signal and a TM*-mode signal respectively detected by two 90-deg hybrid receivers and a flip-mounted TIA chip assisted by two local-oscillator signals from the tunable laser device.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: November 5, 2024
    Assignee: MARVELL ASIA PTE LTD
    Inventor: Radhakrishnan L. Nagarajan
  • Patent number: 12130473
    Abstract: An optical interconnect device and the method of fabricating it are described. The device includes an in-plane laser cavity transmitting a light beam along a first direction, a Franz Keldysh (FK) optical modulator transmitting the light beam along the first direction, a mode-transfer module including a tapered structure disposed after the FK optical modulator along the first direction to enlarge the spot size of the light beam to match an external optical fiber and a universal coupler controlling the light direction. The tapered structure can be made linear or non-linear along the first direction. The universal coupler passes the laser light to an in-plane external optical fiber if the fiber is placed along the first direction, or it is a vertical coupler in the case that the external optical fiber is placed perpendicularly to the substrate surface. The coupler is coated with highly reflective material.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: October 29, 2024
    Assignee: Mellanox Technologies, Ltd.
    Inventors: Jonathan Luff, Wei Qian, Dimitrios Kalavrouziotis, Elad Mentovich, Dazeng Feng
  • Patent number: 12120069
    Abstract: This application provides a full-duplex self-interference weakening method and a full-duplex self-interference weakening system. The full-duplex self-interference weakening method includes: separately receiving, by a first port of a dual-polarized receive antenna and a second port of the dual-polarized receive antenna, a signal sent by a transmit antenna; and adjusting and combining the signal received by the first port of the dual-polarized receive antenna and/or the signal received by the second port of the dual-polarized receive antenna, to weaken interference caused by the transmit antenna to the dual-polarized receive antenna. The full-duplex self-interference weakening method and the full-duplex self-interference weakening system provided in this application resolve a problem that a quantity of antennas and an antenna location are limited in an existing antenna interference cancelation method.
    Type: Grant
    Filed: September 21, 2022
    Date of Patent: October 15, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jingjing Huang, Ming Gan, Xin Zuo
  • Patent number: 11994629
    Abstract: The present disclosure is directed to light detection and ranging (LIDAR) system including a laser configured to output a beam, an amplifier, and an optical network. The amplifier may be configured to receive a plurality of optical signals that are generated based on the beam and are respectively associated with a plurality of phases. The amplifier may be configured to generate a plurality of amplified optical signals based on the plurality of optical signals. The optical network may be coupled to the amplifier. The optical network may be configured to receive the plurality of amplified optical signals. The optical network may be configured to generate an optical signal based on the plurality of amplified optical signals. An amplitude of the optical signal may correspond to a combined amplitude of the plurality of amplified optical signals.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: May 28, 2024
    Assignee: AURORA OPERATIONS, INC.
    Inventors: Zeb Barber, Randy R. Reibel, Emil Kadlec
  • Patent number: 11988872
    Abstract: First and second waveguide structures are coupled to a waveguide coupling structure, the first waveguide structure comprising a first guiding core structure formed on a first cladding structure, and a second cladding structure formed on the first guiding core structure. The first and second waveguide structures have respective guiding ridges. The second waveguide structure comprises a second guiding core structure formed on a third cladding structure, and a fourth cladding structure formed on the second guiding core structure. The waveguide coupling structure comprises a transition structure, a multimode interference structure between the transition structure and the second waveguide structure, and an electrode over at least a portion of the guiding ridge within the second cladding structure and over at least a portion of the transition structure.
    Type: Grant
    Filed: November 29, 2021
    Date of Patent: May 21, 2024
    Assignee: Ciena Corporation
    Inventors: Kelvin Prosyk, Ronald Richard Millett
  • Patent number: 11955975
    Abstract: A routing integrated circuit element is disclosed. The routing integrated circuit element is connected between a first and a second electronic module and includes a body, a first, and a second buffer element. A first side of the body is connected to the first electronic module. A second side is connected to the second electronic module and located on a different side from the first side. The distance between the second side and the second electronic module is shorter than the distance between the second side and the first electronic module. The first buffer element transmits an electronic signal from the first side to the second side. The second buffer element transmits the electronic signal from the second side to the first side, wherein the transmission directions of the electronic signals transmitted by the first buffer element and the second buffer element are opposite.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: April 9, 2024
    Assignee: LERAIN TECHNOLOGY CO., LTD.
    Inventors: Miaobin Gao, Chia-Chi Hu
  • Patent number: 11942759
    Abstract: The present technology can be used to control the current injection profile in the longitudinal direction of a high-power diode laser in order to optimize current densities as a function of position in the cavity to promote higher reliable output power and increase the electrical to optical conversion efficiency of the device beyond the level which can be achieved without application of this technique. This approach can be utilized, e.g., in the fabrication of semiconductor laser chips to improve the output power and wall plug efficiency for applications requiring improved performance operation.
    Type: Grant
    Filed: January 31, 2023
    Date of Patent: March 26, 2024
    Assignee: LAWRENCE LIVERMORE NATIONAL SECURITY, LLC
    Inventors: Paul O. Leisher, Robert J. Deri, Susant K. Patra
  • Patent number: 11845855
    Abstract: A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: December 19, 2023
    Assignee: UNIVATION TECHNOLOGIES LLC
    Inventors: Swapnil Chandak, Nitin Borse, Ayush A. Bafna, Yi Zhang, Timothy R. Lynn, Roger L. Kuhlman, John F. Szul
  • Patent number: 11804692
    Abstract: A laser device based on silicon photonics with an in-cavity power monitor includes a gain chip mounted on a silicon photonics substrate and configured to emit light in an active region bounded between a frontend facet with low reflectivity and a backend facet with anti-reflective characteristics. The laser device further includes a wavelength tuner formed with waveguides in the silicon photonics substrate optically coupled to the backend facet to receive light from the gain chip and configured to have a reflector with high reflectivity to reflect the light in an extended cavity formed with the frontend facet through which a laser with a tuned wavelength and amplified power is outputted. Additionally, the laser device includes a photodiode formed in the silicon photonics substrate and coupled to the waveguides in the extended cavity right in front of the reflector to measure power of light thereof.
    Type: Grant
    Filed: March 3, 2021
    Date of Patent: October 31, 2023
    Assignee: MARVELL ASIA PTE LTD
    Inventors: Xiaoguang He, Radhakrishnan L. Nagarajan
  • Patent number: 11791437
    Abstract: An amplified spontaneous emission, ASE, source device combining a superluminescent light emitting diode, SLED, with a semiconductor optical amplifier, SOA, the SLED and SOA being arranged in series so that the SLED acts as a seed and the SOA acts as a broadband amplifier for the SLED output. Both SLED and SOA have a structure made up of a succession of epitaxial semiconductor layers which form a waveguide comprising a core of active region layers and surrounding cladding layers. The SLED and SOA confinement factors of the SLED and SOA, wherein confinement factor is the percentage of the optical mode power in the active region layers, is designed so that the SLED confinement factor is greater than that of the SOA by at least 20%. This allow higher power outputs, because the SLED power limits imposed by the onset of non-linear effects and catastrophic optical damage can be circumvented.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: October 17, 2023
    Assignee: EXALOS AG
    Inventors: Marcus Dülk, Nicolai Matuschek
  • Patent number: 11784688
    Abstract: A method for wireless communication in a reflective environment includes (a) receiving first wireless signals at a first antenna assembly at least partially via a first reflective environment, (b) generating a first electrical signal from a first antenna element of the first antenna assembly in response to the first wireless signals, the first antenna element having a first polarization, (c) generating a second electrical signal from a second antenna element of the first antenna assembly in response to the first wireless signals, the second antenna element having a second polarization different from the first polarization, (d) shifting phase of at least one of the first electrical signal and the second electrical signal, and (e) after shifting phase, combining at least the first electrical signal and the second electrical signal to generate a combined electrical signal.
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: October 10, 2023
    Assignee: Cable Television Laboratories, Inc.
    Inventors: John C. Bahr, Thomas J. Ellis
  • Patent number: 11705970
    Abstract: An optical receiver can implement a transimpedance amplifier (TIA) to process received light using a closed loop optical pre-amplification. The optical receiver can use an average input value of the TIA to control an semiconductor optical amplifier (SOA) or pre-amplification as received average signal varies. The optical receiver can include a gain controller for the TIA that can measure the TIA swing to adjust the gain of the SOA to pre-amplify received light in a closed loop control configuration.
    Type: Grant
    Filed: June 16, 2021
    Date of Patent: July 18, 2023
    Assignee: Juniper Networks, Inc.
    Inventors: Robert S. Guzzon, John Garcia, Theodore J. Schmidt
  • Patent number: 11671179
    Abstract: Example fiber amplifiers and gain adjustment methods for the fiber amplifiers are described. One example fiber amplifier includes a first power amplifier, a wavelength level adjuster, and a controller, where the first power amplifier is connected to the wavelength level adjuster. The controller includes a first input end and a control output end. The first input end is configured to receive an input optical signal, and the control output end is configured to output a first amplification control signal to the first power amplifier, and output an adjustment control signal to the wavelength level adjuster. The wavelength level adjuster is configured to perform power adjustment on each wavelength in a separate manner based on the adjustment control signal.
    Type: Grant
    Filed: August 20, 2021
    Date of Patent: June 6, 2023
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yuanwu Wang, Zhiwen Chang, Guodong You, Zhenqing Zhao, Fei Chen
  • Patent number: 11670907
    Abstract: A laser device includes front and back DBRs and an interferometer. The front DBR is coupled to a front DBR electrode. The front DBR forms a first tunable multi-peak lasing filter. The back DBR is coupled to a back DBR electrode. The back DBR forms a second tunable multi-peak lasing filter. The interferometer part is coupled between the front DBR and the back DBR. The interferometer part includes first and second waveguide combiners and first and second interferometer waveguides coupled therebetween. The first waveguide combiner couples the interferometer part to the back DBR. The second waveguide combiner couples the interferometer part to the front DBR. The first interferometer waveguide is coupled to an interferometer electrode. The interferometer forms a third tunable multi-peak lasing filter.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: June 6, 2023
    Assignee: II-VI DELAWARE, INC.
    Inventors: Jan-Olof Wesström, Per Granestrand
  • Patent number: 11658253
    Abstract: A high absorption photovoltaic material and method of making the material for use in a solar cell are disclosed. The photovoltaic material includes a surface modified with a layer of repeating photonic crystal structures. The photonic crystal structures are approximately inverse conically shaped and have a curved sidewall that has an approximately Gaussian shape. The photonic crystal structures generally have a high vertical depth and sidewall angle. The structures also have a gradient refractive index profile and exhibit the parallel-to-interface refraction light trapping effect. An anti-reflective coating is disposed over the photonic crystal structure layer. The photovoltaic material exhibits near unity light absorption over a broad range of visible and near infrared wavelengths and incidence angles, even at reduced thicknesses.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: May 23, 2023
    Assignee: Rensselaer Polytechnic Institute
    Inventors: Ping Kuang, Shawn Yu Lin, Anthony Post, Sajeev Oommen John, Sergey Leonidovich Eyderman, Mei-Li Hsieh
  • Patent number: 11658460
    Abstract: The present technology can be used to control the current injection profile in the longitudinal direction of a high-power diode laser in order to optimize current densities as a function of position in the cavity to promote higher reliable output power and increase the electrical to optical conversion efficiency of the device beyond the level which can be achieved without application of this technique. This approach can be utilized, e.g., in the fabrication of semiconductor laser chips to improve the output power and wall plug efficiency for applications requiring improved performance operation.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: May 23, 2023
    Assignee: LAWRENCE LIVERMORE NATIONAL SECURITY, LLC
    Inventors: Paul O. Leisher, Robert J. Deri, Susant K. Patra
  • Patent number: 11646802
    Abstract: Systems and methods are provided for receiving an optical signal from an optical fiber, including: coupling via an optical coupler the optical signal from an optical fiber into first and second waveguides, wherein the optical signal comprises TE and TM polarized optical signals and the optical coupler couples the TE polarized optical signal into the first waveguide and the TM polarized optical signal into the second waveguide; equalizing the TE and TM polarized optical signals from the coupler to equalize optical power levels of the TE and TM polarized optical signals; optically combining the equalized TE and TM polarized optical signals; and transmitting the combined optical signal to a photodetector.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: May 9, 2023
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Di Liang, Zhihong Huang
  • Patent number: 11606149
    Abstract: An optical transmitter based on optical time division multiplexing is disclosed, which may solve the issues of complex structure and operation of a multilevel-OTDM-based optical transmitter while using a multilevel signal modulation format and OTDM technology that may increase the transmission rate of an optical transmitter with limited bandwidth.
    Type: Grant
    Filed: December 8, 2021
    Date of Patent: March 14, 2023
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sanghwa Yoo, Joon Young Huh, Sae-Kyoung Kang, Joon Ki Lee
  • Patent number: 11567206
    Abstract: A LiDAR system including a laser amplification system is disclosed. The laser amplification system includes a laser source and an optical amplifier. The laser source has a laser cavity and is configured to output electromagnetic radiation. The optical amplifier includes quantum dots and is positioned outside the laser cavity to receive the electromagnetic radiation output from the laser source. The optical amplifier amplifies the received electromagnetic radiation using the quantum dots and outputs the amplified electromagnetic radiation.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: January 31, 2023
    Assignee: INSIGHT LIDAR, INC.
    Inventors: Jason Ensher, Christopher Wood
  • Patent number: 11563493
    Abstract: A MIMO system comprises a remote radio unit (RRU) and central unit. The RRU comprises: a binary phase shift keying (BPSK) modulator, configured to modulate a BPSK waveform by a local oscillator (LO) signal to generate a stimulus signal, wherein the LO signal is derived from a downlink optical signal received via downlink radio over fiber (DL-ROF) from a central unit (CU); and an optical signal generator, in particular a laser, configured to generate an uplink optical signal based on the stimulus signal for transmission via uplink radio over fiber (UL-ROF) to the CU.
    Type: Grant
    Filed: April 23, 2021
    Date of Patent: January 24, 2023
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Ganghua Yang, Ramin Khayatzadeh, Zhipeng Zhao, Hongqiang Bao
  • Patent number: 11483121
    Abstract: This application provides a full-duplex self-interference weakening method and a full-duplex self-interference weakening system. The full-duplex self-interference weakening method includes: separately receiving, by a first port of a dual-polarized receive antenna and a second port of the dual-polarized receive antenna, a signal sent by a transmit antenna and adjusting and combining the signal received by the first port of the dual-polarized receive antenna and/or the signal received by the second port of the dual-polarized receive antenna, to weaken interference caused by the transmit antenna to the dual-polarized receive antenna. The full-duplex self-interference weakening method and the full-duplex self-interference weakening system provided in this application resolve a problem that a quantity of antennas and an antenna location are limited in an existing antenna interference cancelation method.
    Type: Grant
    Filed: October 16, 2020
    Date of Patent: October 25, 2022
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jingjing Huang, Ming Gan, Xin Zuo
  • Patent number: 11467265
    Abstract: In one embodiment, a lidar system includes a light source configured to emit (i) local-oscillator light and (ii) pulses of light, where each emitted pulse of light is coherent with a corresponding portion of the local-oscillator light. The light source includes a seed laser configured to produce seed light and the local-oscillator light. The light source also includes a pulsed optical amplifier configured to amplify temporal portions of the seed light to produce the emitted pulses of light, where each amplified temporal portion of the seed light corresponds to one of the emitted pulses of light. The lidar system also includes a receiver configured to detect the local-oscillator light and a received pulse of light, the received pulse of light including light from one of the emitted pulses of light that is scattered by a target located a distance from the lidar system.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: October 11, 2022
    Assignee: Luminar, LLC
    Inventors: Joseph G. LaChapelle, Jason M. Eichenholz, Alex Michael Sincore
  • Patent number: 11409032
    Abstract: A method for reducing nonlinear frequency shifts and suppressing stimulated Brillouin scattering (SBS) in a fiber laser amplifier system. The method includes providing a seed beam having a certain wavelength and frequency modulating the seed beam with an RF waveform to spectrally broadening the seed beam, where the RF waveform is a relatively slow-speed waveform having a large modulation depth. The method also includes amplifying the frequency modulated seed beam with an amplifier having a large nonlinear phase shift and exhibiting frequency modulation (FM) to amplitude modulation (AM) conversion, where the modulation depth is much larger than the nonlinear phase shift of the amplifier.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: August 9, 2022
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventor: Gregory D. Goodno
  • Patent number: 11404846
    Abstract: A laser device (1) includes: a branch waveguide (23) configured to split light propagating from an optical amplifier (10) into a plurality of light beams and output the plurality of light beams; a multi-core waveguide (27) including a plurality of waveguide cores (24 to 26) configured to carry the plurality of light beams input from the branch waveguide (23); and a light reflector (31) optically coupled to a light input/output end of the multi-core waveguide (27). The waveguide cores (24 to 26) are configured to extend along the same direction, and placed in proximity to one another to enable optical coupling between adjacent waveguide cores of the waveguide cores (24 to 26).
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: August 2, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Tadashi Murao
  • Patent number: 11296416
    Abstract: In various embodiments, a metamaterial structure antenna may comprise: a feed line for feeding a signal; a ground plane comprising a cross-shaped aperture forming circular polarization on the basis of a magnetic field induced by the fed signal; and a patch plane formed parallel to the ground plane which emits electromagnetic waves on the basis of the circular polarization.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: April 5, 2022
    Inventors: Jae-Seok Park, Jeong-Hae Lee, Jae-Hyun Park, Kwi-Seob Um, Young-Ho Ryu, Chang-Hyun Lee, Sang-Wook Kwon, Sung-Bum Park, Jae-Gon Lee, Sang-Wook Chi
  • Patent number: 11177632
    Abstract: A device and a method to produce an augmented-laser (ATLAS) comprising a bi-stable resistive system (BRS) integrated in series with a semiconductor laser. The laser exhibits reduction/inhibition of the Spontaneous Emission (SE) below lasing threshold by leveraging the abrupt resistance switch of the BRS. The laser system comprises a semiconductor laser and a BRS operating as a reversible switch. The BRS operates in a high resistive state in which a semiconductor laser is below a lasing threshold and emitting in a reduced spontaneous emission regime, and a low resistive state in which a semiconductor laser is above or equal to a lasing threshold and emitting in a stimulated emission regime. The BRS operating as a reversible switch is electrically connected in series across two independent chips or on a single wafer. The BRS is formed using insulator-to-metal transition (IMT) materials or is formed using threshold-switching selectors (TSS).
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: November 16, 2021
    Assignee: International Business Machines Corporation
    Inventors: Julien Frougier, Kangguo Cheng, Ruilong Xie, Chanro Park
  • Patent number: 11081863
    Abstract: An optical device comprises a light input, a light modulating means and a light output. The optical device further comprises an optical amplification device arranged to amplify light travelling between said light modulating means and said output. The optical amplification device comprises first and second serially connected post SOA (Semiconductor Optical Amplifier) units, each comprising at least one respective serially connected post SOA segment, which device is arranged to vary a light amplification by varying respective SOA bias voltages across said post SOA segments. A total SOA length of the first post SOA unit is relatively longer than a total SOA length of the second post SOA unit, which is relatively shorter. The optical device is arranged to, during operation using a particular operation program, always keep respective SOA bias voltages across each of the post SOA segments of the first post SOA unit at +0.5 V or more.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: August 3, 2021
    Assignee: FINISAR SWEDEN AB
    Inventors: Jan-Olof Wesström, Per Granestrand, Martin Anders Isak Stattin, Staffan David Hellström
  • Patent number: 10871615
    Abstract: An optical add/drop multiplexer (OADM) includes a drop signal separator and a drop signal reflector. The drop signal separator is coupled to a main input end and a drop end. The drop signal separator is coupled to the drop signal reflector, and the drop signal reflector is coupled to a main output end.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: December 22, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jing Wang, Lei Liu
  • Patent number: 10862261
    Abstract: A laser medium unit includes: a plate-shaped laser gain medium which includes a first surface and a second surface opposite to the first surface and generates emission light by the irradiation of excitation light from the first surface; a reflection member that is provided on the second surface so as to reflect the excitation light and the emission light; and a cooling member that cools the laser gain medium. The laser gain medium includes an irradiation area which is irradiated with the excitation light and an outer area which is located outside the irradiation area when viewed from a thickness direction intersecting the first surface and the second surface. The cooling member is thermally connected to the second surface through the reflection member so that a cooling area of the laser gain medium is formed on the second surface.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: December 8, 2020
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Kenichi Ueda, Koichi Iyama, Yoshinori Kato, Takashi Sekine, Toshiyuki Kawashima
  • Patent number: 10855052
    Abstract: A semiconductor laser (1) emits laser light. An electro-absorption optical modulator (2) modulates the laser light. The electro-absorption optical modulator (2) includes a plurality of electro-absorption regions (2a, 2b, 2c) having different extinction characteristics, whereby the extinction ratio curve of the optical device can be controlled to have a shape with multiple steps that is suited to driving conditions.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: December 1, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yudai Imai, Norio Okada, Shinichi Kaneko
  • Patent number: 10845480
    Abstract: In one embodiment, a lidar system includes a light source configured to emit an optical signal. The light source includes a seed laser diode configured to produce a seed optical signal and a semiconductor optical amplifier (SOA) configured to amplify the seed optical signal to produce an amplified seed optical signal, where the emitted optical signal includes the amplified seed optical signal. The lidar system also includes a scanner configured to direct the emitted optical signal into a field of regard of the lidar system and a receiver configured to detect a portion of the emitted optical signal scattered by a target located a distance from the lidar system. The lidar system further includes a processor configured to determine the distance from the lidar system to the target.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: November 24, 2020
    Assignee: Luminar Technologies, Inc.
    Inventors: Lawrence Shah, Jason M. Eichenholz, Joseph G. LaChapelle, Alex Michael Sincore, Cheng Zhu
  • Patent number: 10840676
    Abstract: An optical device that includes: a base layer; a first region supported by the base layer, the first region including a first plurality of quantum-confined nanostructures and having a first density of quantum-confined nanostructures; a second region supported by the base layer, the first and second regions being non-overlapping regions, the second region having a second density of quantum-confined nanostructures lower than the first density; and an optical confinement structure supported by the base layer and configured to guide at least one transverse optical mode between a first end and a second end of the optical confinement structure. The first region substantially overlaps with the at least one transverse optical mode, and the first density varies across a cross-section of the optical device.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: November 17, 2020
    Assignee: X Development LLC
    Inventors: Martin Friedrich Schubert, Michael Jason Grundmann, Jesse Lu, Brian John Adolf
  • Patent number: 10826263
    Abstract: A laser medium unit includes: a plate-shaped laser gain medium which includes a first surface and a second surface opposite to the first surface and generates emission light by the irradiation of excitation light from the first surface; a reflection member that is provided on the second surface so as to reflect the excitation light and the emission light; and a cooling member that cools the laser gain medium. The laser gain medium includes an irradiation area which is irradiated with the excitation light and an outer area which is located outside the irradiation area when viewed from a thickness direction intersecting the first surface and the second surface. The cooling member is thermally connected to the second surface through the reflection member so that a cooling area of the laser gain medium is formed on the second surface.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: November 3, 2020
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Kenichi Ueda, Koichi Iyama, Yoshinori Kato, Takashi Sekine, Toshiyuki Kawashima
  • Patent number: 10811848
    Abstract: A multi-channel laser source, including: a bus waveguide coupled, at an output end of the bus waveguide, to an output of the multi-channel laser source; a first semiconductor optical amplifier; a first back mirror; a first wavelength-dependent coupler, having a first resonant wavelength, on the bus waveguide; a second semiconductor optical amplifier; a second back mirror; and a second wavelength-dependent coupler, on the bus waveguide, having a second resonant wavelength, different from the first resonant wavelength. In some embodiments the first semiconductor optical amplifier is coupled to the bus waveguide by the first wavelength-dependent coupler, which is nearer to the output end of the bus waveguide than the second wavelength-dependent coupler, the second semiconductor optical amplifier is coupled to the bus waveguide by the second wavelength-dependent coupler, and the first wavelength-dependent coupler is configured to transmit light, at the second resonant wavelength, along the bus waveguide.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: October 20, 2020
    Assignee: Rockley Photonics Limited
    Inventors: Aaron John Zilkie, Pradeep Srinivasan
  • Patent number: 10615141
    Abstract: A structure can include a III-N layer with a first lattice constant, a first rare earth pnictide layer with a second lattice constant epitaxially grown over the III-N layer, a second rare earth pnictide layer with a third lattice constant epitaxially grown over the first rare earth pnictide layer, and a semiconductor layer with a fourth lattice constant epitaxially grown over the second rare earth pnictide layer. A first difference between the first lattice constant and the second lattice constant and a second difference between the third lattice constant and the fourth lattice constant are less than one percent.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: April 7, 2020
    Assignee: IQE plc
    Inventors: Andrew Clark, Rytis Dargis, Michael Lebby, Rodney Pelzel
  • Patent number: 10608410
    Abstract: The embodiments herein describe a single-frequency laser source (e.g., a distributed feedback (DFB) laser or distributed Bragg reflector (DBR) laser) that includes a feedback grating or mirror that extends along a waveguide. The grating may be disposed over a portion of the waveguide in an optical gain region in the laser source. Instead of the waveguide or cavity being linear, the laser includes a U-turn region so that two ends of the waveguide terminate at the same facet. That facet is coated with an anti-reflective (AR) coating.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: March 31, 2020
    Assignee: Cisco Technology, Inc.
    Inventors: Matthew J. Traverso, Dominic F. Siriani, Mark Webster
  • Patent number: 10585250
    Abstract: An optical interconnect device on a silicon substrate is disclosed which includes a trench having two slanted side walls opposite to each other, a number of polymer waveguides formed in the trench, each including a straight portion and two end reflectors formed on the slanted side walls of the trench, a light source and an optical receiver disposed on an insulated layer on the silicon surface outside the trench. Conductive lines are patterned on the insulating layer and connects to the light source and the optical receiver. The light source and the optical receiver are aligned respectively to the two end reflectors of each polymer waveguide such that an optical path is formed from the light source device through the plurality of polymer waveguides to the optical receiver device, via reflection by the two end reflectors. A fabrication method to build the device is disclosed thereof.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: March 10, 2020
    Assignee: ADOLITE INC.
    Inventors: Abraham Jou, Paul Mao-Jen Wu
  • Patent number: 10578801
    Abstract: A SOI bent taper structure is used as a mode convertor. By tuning the widths of the bent taper and the bend angles, almost lossless mode conversion is realized between TE0 and TE1 in a silicon waveguide. The simulated loss is <0.05 dB across C-band. This bent taper can be combined with bi-layer TM0-TE1 rotator to reach very high efficient TM0-TE0 polarization rotator. An ultra-compact (9 ?m) bi-layer TM0-TE1 taper based on particle swarm optimization is demonstrated. The entire TM0-TE0 rotator has a loss <0.25 dB and polarization extinction ratio >25 dB, worst-case across the C-band.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: March 3, 2020
    Assignee: Elenion Technologies, LLC
    Inventor: Yangjin Ma
  • Patent number: 10534218
    Abstract: The present disclosure provides a backlight module, which includes at least one quantum wire unit. The at least one quantum wire unit is configured to have an effective wire width such that the at least one quantum wire unit is capable of converting electric energy to emit light of a selected wavelength. Each of quantum wire unit comprises a first electrode, disposed on a first side of a substrate layer; a first buffer layer, disposed on a second side of the substrate layer; an active layer, disposed over the first buffer layer; a second buffer layer, disposed over the active layer; and a second electrode disposed over the second buffer layer. Each quantum wire unit, along with the substrate layer, forms a quantum wire laser generator, which is configured such that the active layer emits light upon application of a voltage difference between the first electrode and the second electrode.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: January 14, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Ruijun Dong, Dong Chen, Guangquan Wang, Haiwei Sun, Lili Chen, Zhihui Zeng, Lu Yu, Jianjie Wu, Qian Wang, Wei Sun, Huijuan Chen
  • Patent number: 10498105
    Abstract: The invention relates to a laser diode (10) which has at least one active layer (12) which is arranged within a resonator (14) and is operatively connected to a outcoupling element (16), and further at least one contact layer (18) for coupling charge carriers into the active layer (12), wherein the resonator (14) comprises at least a first section (20) and a second section (22), wherein the second section (22) comprises a plurality of separate resistor elements (24) having a specific electrical resistivity greater than the specific electrical resistivity of the regions (26) between adjacent resistor elements (24), wherein a width (W3) of the resistor elements (24) along a longitudinal axis (X1) of the active layer (12) is less than 20 ?m, and a projection of the resistor elements (24) on the active layer (12) along the first axis (Z1) overlap with at least 10% of the active layer (12).
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: December 3, 2019
    Assignee: FORSCHUNGSVERBUND BERLIN E.V.
    Inventors: Joerg Fricke, Jonathan Decker, Paul Crump, Goetz Erbert
  • Patent number: 10490692
    Abstract: There is provided a semiconductor light-emitting device including a light-emitting edge, an opposite edge, and a first conductive layer that includes a current narrowing structure having a longitudinal direction along one direction from the opposite edge to the light-emitting edge. An active layer is between the first conductive layer and a second conductive layer which respectively come into contact with the first conductive layer and the second conductive layer. The current narrowing structure includes a spread area such that a width of the spread area in a direction along a surface of the first conductive layer widens from a predetermined position toward the light-emitting edge in the one direction. The first electrode layer includes an electrode area on at least the spread area such that a width thereof in the direction along the surface of the first conductive layer becomes smaller than the width of the spread area.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: November 26, 2019
    Assignee: SONY CORPORATION
    Inventors: Yoshiaki Watanabe, Takayuki Kawasumi
  • Patent number: 10473858
    Abstract: An optical waveguide may include a silicon portion and a silicon nitride portion positioned over the silicon portion. The silicon portion may include a taper that decreases a width of the silicon portion. The optical waveguide may include a transition between a loaded single mode or multimode waveguide to a single mode waveguide. The silicon nitride portion may confine optical signals traveling through the optical waveguide in the silicon portion.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: November 12, 2019
    Assignee: Finisar Corporation
    Inventors: Daniel Mahgerefteh, Ying Luo, Shiyun Lin, Jin-Hyoung Lee
  • Patent number: 10408874
    Abstract: A light source device includes a light source that generates incoherent light, and an optical amplifier having gain characteristics indicating a gain at each wavelength, which receives the incoherent light output by the light source as input light, and outputs amplified light obtained by amplifying the input light, and a central wavelength of an intensity distribution indicating an intensity at each wavelength of the input light is a wavelength longer than a central wavelength of the gain characteristics indicating a gain at each wavelength of the optical amplifier.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: September 10, 2019
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Tomonori Nakamura, Mitsunori Nishizawa
  • Patent number: 10411146
    Abstract: A ternary superlattice structure includes a substrate and periodic layer structure on the substrate and having alternating infrared absorbing semiconductor materials having a first layer of InAs[1-x]Sb[x] ternary alloy material, and a second layer of In[1-y]Z[y]As ternary alloy material, wherein Z is Ga or Al, wherein x is in a range of greater than zero and less than one, wherein y is in a range of greater than zero and less than one, and wherein a thickness of each of the first and second layers are substantially similar and configured to absorb light in a predetermined spectral band and prevent trapping of carriers in any particular layer. In examples, y is in a range from about 0.05 to about 0.35, and x is in a range of about 0.2 to about 0.8.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: September 10, 2019
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Gamini Ariyawansa, Charles J. Reyner, John E. Scheihing, Joshua M. Duran
  • Patent number: 10389087
    Abstract: Methods and apparatus for spectral narrowing and wavelength stabilization of broad-area lasers, such as an apparatus including a broad-area laser source configured to emit light along an emission axis in an emission pattern extending along the emission axis, and a single-mode fiber Bragg grating, such as a single-mode core incorporating a fiber Bragg grating embedded in a core of a dual-clad fiber, the single-mode fiber Bragg grating configured to spectrally selectively reflect back light from a sub-aperture portion of the emitted light to the broad-area laser source. The single mode core having the FBG is off-axis in comparison to the central axis of the double-clad fiber and allows for frequency stabilization of the broad area laser diode output improving its performance as pump laser for a doped fiber amplifier.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: August 20, 2019
    Assignee: UNIVERSITY OF ROCHESTER
    Inventors: Jordan P. Leidner, John R. Marciante
  • Patent number: 10228514
    Abstract: A SOI bent taper structure is used as a mode convertor. By tuning the widths of the bent taper and the bend angles, almost lossless mode conversion is realized between TE0 and TE1 in a silicon waveguide. The simulated loss is <0.05 dB across C-band. This bent taper can be combined with bi-layer TM0-TE1 rotator to reach very high efficient TM0-TE0 polarization rotator. An ultra-compact (9 ?m) bi-layer TM0-TE1 taper based on particle swarm optimization is demonstrated. The entire TM0-TE0 rotator has a loss <0.25 dB and polarization extinction ratio >25 dB, worst-case across the C-band.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: March 12, 2019
    Assignee: Elenion Technologies, LLC
    Inventor: Yangjin Ma
  • Patent number: 10222564
    Abstract: A three dimensional optical interconnect device having one input and multiple output ports mounted on the same surface of a SOI wafer is disclosed. The first Si surface has a silicon waveguide with a straight portion, a first and a second 45 degree end reflectors and multiple optical splitters arranged in a sequence along the straight portion. The second silicon surface has an insulating layer and an active optical input device (VCSEL laser) and multiple receiver ports mounted on the insulating layer. The first end reflector is aligned to the input optical device, the optical splitters and the second end reflector are sequentially aligned to the photodetectors respectively. Multiple optical paths are formed from the input optical device to each of photodetectors by a reflection from each aligned optical splitter and a reflection from the second end reflector through the silicon substrate.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: March 5, 2019
    Assignee: ADOLITE INC.
    Inventors: Abraham Jou, Paul Mao-Jen Wu
  • Patent number: 10151877
    Abstract: An optical circuit module comprises a substrate with a first optical coupler connected to a first optical waveguide and a second optical coupler connected to a second optical waveguide on a substrate surface side; and a semiconductor photonic device mounted on the substrate, wherein the semiconductor photonic device has a third optical waveguide and a fourth optical waveguide extending to a first end face that faces the substrate surface, and wherein the third optical waveguide is optically connected to the first optical coupler and the fourth optical waveguide is optically connected to the second optical coupler.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: December 11, 2018
    Assignees: FUJITSU LIMITED, PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION
    Inventor: Akinori Hayakawa
  • Patent number: 10151880
    Abstract: The present invention relates to an optical light guide element having a first end section with a light entrance area designed for facing a light source and having a second end section with a light exit area designed for facing a light target area, wherein the light exit area is defined by a second surface area on the optical light guide element which faces a light target area, and wherein the light entrance area is defined by a first surface area on the optical light guide element which faces the light source, wherein the first end section comprises a first inclined surface area which forms an acute angle with the first surface area of the light entrance area, wherein the second end section forms a second inclined surface area which encloses an acute angle with the surface area of the light exit area, characterized in that said first surface area on the optical light guide element which faces the light source comprises a first replicated polymer lens.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: December 11, 2018
    Assignee: Anteryon Wafer Optics B.V.
    Inventors: Willem Matthijs Brouwer, Edwin Maria Wolterink