Electro-optic Patents (Class 385/2)
  • Patent number: 11175520
    Abstract: An optical semiconductor device includes a semiconductor substrate, a first semiconductor layer provided on the semiconductor substrate, and a mesa waveguide provided on the principal surface of the first semiconductor layer. The semiconductor device also includes a buried layer covering the upper surface of the first semiconductor layer. Part of the upper surface of the first semiconductor layer is exposed. A mesa structure provided at the boundary between a part of the first semiconductor layer is covered with the buried layer and a part of the first semiconductor layer is exposed. One side of the mesa structure is covered with the buried layer, and the other side is exposed. The optical semiconductor device can reduce the generation of stress in the buried layer, for example, to suppress the occurrence of cracks in the buried layer and enhance the reliability.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: November 16, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yuichiro Horiguchi, Satoshi Nishikawa, Koichi Akiyama, Keigo Fukunaga, Yohei Hokama, Yosuke Suzuki
  • Patent number: 11169341
    Abstract: The present disclosure relates to an electro-optical modulator system having a source laser which generates an input optical signal. The input optical signal is received by an electro-optical module. The electro-optical module is implantable into an anatomy and includes a plurality of pixels. Each pixel has associated therewith an electrode and an optical modulator subsystem. The electrode receives electrical signals from the anatomy. The optical modulator subsystem receives the input optical signal and modulates the input optical signal to generate modulated optical output signals in relation to the received electrical signals. A detector subsystem may be used to receive and collect the modulated optical output signals.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: November 9, 2021
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Susant Patra, Razi-Ul Muhammad Haque, Komal Kampasi
  • Patent number: 11163113
    Abstract: An athermal optical waveguide structure such as an optical add drop multiplexer (OADM) or the like is fabricated by a method that includes forming a lower cladding layer on a substrate. A waveguiding core layer is formed on the lower cladding layer. An upper cladding layer is formed on the waveguiding core layer and the lower cladding layer a sol-gel material. The sol-gel material includes an organically modified siloxane and a metal oxide. A thermo-optic coefficient of the sol-gel material is adjusted by curing the sol-gel material for a selected duration of time at a selected temperature such that the thermo-optic coefficient of the sol-gel material compensates for a thermo-optic coefficient of at least the waveguiding core layer such that an effective thermo-optic coefficient of the optical waveguide structure at a specified optical wavelength and over a specified temperature range is reduced.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: November 2, 2021
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA
    Inventors: Soha Namnabat, Robert A. Norwood, Kyung-Jo Kim, Roland Himmelhuber
  • Patent number: 11099454
    Abstract: A method of operating an optical modulator. The optical modulator having: a rib waveguide which includes a junction which is either a PIN or PN junction, the junction having a breakdown voltage. The method comprising: applying a reverse bias to the junction, so as to operate the optical modulator around the breakdown voltage of the junction; operating the modulator in an avalanche multiplication and/or band-to-band tunnelling mode by increasing the reverse bias past the breakdown voltage.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: August 24, 2021
    Assignees: Rockley Photonics Limited, University of Southampton
    Inventors: Guomin Yu, Aaron John Zilkie, Yi Zhang, David John Thomson
  • Patent number: 11069830
    Abstract: Disclosed is a quantum-confined Stark effect (QCSE) modulator. In the modulator, a first doped semiconductor region has a first type conductivity, is at the bottom of a trench in a dielectric layer and is immediately adjacent to a semiconductor layer. An MQW region is in the trench on the first doped semiconductor region and at least upper segments of sidewalls of the MQW region are angled away from adjacent sidewalls of the trench such that there are spaces between the MQW region and the dielectric layer. Dielectric spacers fill the spaces. A second doped semiconductor region has a second type conductivity, is on top of the MQW region and optionally extends laterally onto the tops of the dielectric spacers. The spacers prevent shorting of the doped semiconductor regions. Also disclosed are embodiments of a photonics structure including the modulator and of methods for forming the modulator and the photonics structure.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: July 20, 2021
    Assignees: GLOBALFOUNDRIES U.S. Inc., IMEC vzw
    Inventors: Bartlomiej J. Pawlak, Clement J. E. Porret, Srinivasan Ashwyn Srinivasan
  • Patent number: 11067748
    Abstract: A guide transition device including a light source designed to generate a light beam, a light input port on a first plane and coupled to receive the light beam from the light source, a light output port on a second plane different than the first plane, the light output port designed to couple a received light beam to output equipment and plane shifting apparatus coupled to receive the light beam from the light input port on the first plane and to shift or transfer the light beam to the second plane. The plane shifting apparatus is coupled to transfer the light beam to the light output port on the second plane.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: July 20, 2021
    Assignee: Lightwave Logic Inc.
    Inventors: Michael Lebby, Frederick J Leonberger, Richard Becker
  • Patent number: 11054453
    Abstract: In a general aspect, vapor cells are disclosed that include a dielectric body having a first surface and a second surface. The dielectric body includes a plurality of cavities extending from the first surface to the second surface and ordered periodically to define a photonic crystal structure in the dielectric body. Each cavity has a first opening defined by the first surface and a second opening defined by the second surface. The photonic crystal structure has a photonic band gap. The vapor cells additionally include a first optical window covering the first openings and having a surface bonded to the first surface of the dielectric body to form a seal around each of the first openings. A second optical window covers the second openings and has a surface bonded to the second surface of the dielectric body to form a seal around each of the second openings.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: July 6, 2021
    Assignee: Quantum Valley Ideas Laboratories
    Inventors: Hadi Amarloo, Jaime Ramirez-Serrano, James P. Shaffer
  • Patent number: 11042050
    Abstract: Embodiments herein describe reverse biasing one or more PIN junctions formed in at least one layer of a PSR. The resulting electric fields in the PIN junctions overlap with the optical path of the optical signal and sweep away photo-generated hole-electron free carriers away. That is, the electric fields in the PIN junctions remove the free carriers from the path of the optical signal and reduces the population of the free carriers, thereby mitigating the negative impact of free-carrier absorption (FCA).
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: June 22, 2021
    Assignee: Cisco Technology, Inc.
    Inventors: Yi Ho Lee, Ming Gai Stanley Lo, Vipulkumar K. Patel, Prakash B. Gothoskar
  • Patent number: 11042051
    Abstract: A direct-drive region-less polymer modulator includes a waveguide having a first cladding layer, a passive core with a surface abutting the first cladding layer, the passive core extending to an optical input and an optical output. A shaped electro-optic polymer active component with a surface abutting the passive core region, the shaped component being polled to align dipoles and promote modulation of light and having a length that extends only within a modulation area defined by modulation electrodes. A second cladding layer enclosing the shaped component and designed to produce adiabatic transition of light waves traveling in the passive core region into the shaped component to travel the length of the shaped component and return to the passive core region. A portion of the multilayer waveguide defining the polymer modulator as a direct-drive polymer modulator.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: June 22, 2021
    Assignee: Lightwave Logic Inc.
    Inventors: Michael Lebby, Yasufumi Enami
  • Patent number: 11029550
    Abstract: According to one embodiment, an electro-optical device comprises a flexible first substrate and a flexible second substrate which include an electro-optical area, a drive area in the first substrate with terminals formed in the drive area, an external drive circuit connected to the terminals, conductive lines extending from the terminals to the electro-optical area side, and a first resin film overlapping the conductive lines. Further, a gap is formed between the first resin film and the second substrate in planar view.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: June 8, 2021
    Assignee: Japan Display Inc.
    Inventors: Genki Asozu, Toshiyuki Higano, Emi Higano
  • Patent number: 11016360
    Abstract: The performance of an electro-optic modulator depends in part on the capacitance, the inductance, the electric field distribution, and the signal insertion loss of a microwave transmission line that modulates the refractive index of a waveguide via the electro-optic effect. Conventional electro-optic modulators are typically unable to improve one of these properties without negatively affecting other properties, resulting in lower performance. These shortcomings may be overcome, in part, by the inclusion of capacitive structures to decouple these properties. The capacitive structure may include a fang and/or a hook to tune the capacitance and the electric field distribution without appreciably changing the inductance or the signal insertion losses.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: May 25, 2021
    Assignee: Massachusetts Institute of Technology
    Inventors: Siva Yegnanarayanan, Wayne Woods
  • Patent number: 11016361
    Abstract: Various embodiments of a monolithic electro-optical (E-O) modulator are described. The monolithic E-O modulator includes an active region comprising a plurality of p-n junction diodes, as well as a modulation electrode and a bias electrode that extend through the active region. The monolithic E-O modulator further includes a resistor-capacitor-bias-capacitor (RCBC) electrode structure configured to receive an electrical modulation signal, a direct-current (DC) bias voltage and a power supply voltage. Specifically, the RCBC electrode structure includes a resistor coupled to the modulation electrode and two capacitors each coupled to a respective end of the bias electrode. Beneficially, the RCBC electrode structure enables the p-n junction diodes to be biased independently from a DC level of the electrical modulation signal.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: May 25, 2021
    Inventors: Yadong Liu, Tzung-I Su, Pengfei Cai, Dong Pan
  • Patent number: 11009659
    Abstract: The invention relates to optical modulation devices and, in particular, monolithically integrated optical modulation devices. Disclosed herein is a monolithically integrated optical modulation device (200) that comprises: an input optical port (210); an output optical port (215); and an optical waveguide for guiding light from the input optical port to the output optical port. A portion of the optical waveguide is split into at least two branches. The waveguide is configured to cause a net 180° change in direction of the light while guiding said light from the input optical port to the output optical port such that the input optical port and the output optical port are positioned on a first edge of the device. At least some of the net 180° change in direction is achieved within the branches of the waveguide.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: May 18, 2021
    Assignee: Lumentum Technology UK Limited
    Inventors: Andrew John Ward, Neil David Whitbread, Stephen Jones, Andrew Cannon Carter
  • Patent number: 10996537
    Abstract: An optical transmitter comprises a directly coupled MZ interferometer and driver circuit. The MZ interferometer comprises a pair of differentially driven MZ electrodes configured to impart RF signals to light travelling through respective arms of the interferometer, and to receive DC bias as a positive voltage via lower n-type cladding of the MZ interferometer. The lower n-type cladding is at a different positive DC potential to an upper plane RF ground of the MZ interferometer, but the lower n-type cladding and the upper plane RF ground have similar AC potential. The MZ interferometer also comprises a pair of resistors in series configured to provide differential RF termination of the MZ electrodes; and a capacitive coupling between a virtual ground formed at a centre point between the pair of resistors and an RF ground configured to provide common-mode RF termination. The DC supply for the driver circuit is applied to the centre point of the RF termination.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: May 4, 2021
    Assignee: Lumentum Technology UK Limited
    Inventors: Samuel Davies, Andrew John Ward
  • Patent number: 10965101
    Abstract: A plasmonic quantum well laser may be provided. The plasmonic quantum well laser includes a plasmonic waveguide and a p-n junction structure extends orthogonally to a direction of plasmon propagation along the plasmonic waveguide. Thereby, the p-n junction is positioned atop a dielectric material having a lower refractive index than material building the p-n junction, and the quantum well laser is electrically actuated. A method for building the plasmonic quantum well laser is also provided.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: March 30, 2021
    Assignee: International Business Machines Corporation
    Inventors: Heinz Schmid, Benedikt F. Mayer, Stephan Wirths, Kirsten Emilie Moselund
  • Patent number: 10921517
    Abstract: An electro-optic waveguide device may include a slot waveguide including a lower high-refractive-index layer with a first refractive index and an upper high-refractive-index layer with a second refractive index, wherein the lower high-refractive-index layer and the upper high-refractive-index layer have conductivity and are disposed to face each other with a gap; and a slot part formed as a low-refractive-index layer, wherein the low-refractive-index layer is formed of a material producing an electro-optic effect and has a third refractive index lower than the first refractive index and the second refractive index, wherein the low-refractive-index layer is formed in the gap to come into contact with the lower high-refractive-index layer and the upper high-refractive-index layer, and wherein one of the lower high-refractive-index layer or the upper high-refractive-index layer includes a stretch stretching on both sides of a contact portion with the slot part in a width direction intersecting a transmission dir
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: February 16, 2021
    Assignee: Lumentum Japan, Inc.
    Inventors: Kensuke Ogawa, Hiroki Irie, Hiroaki Inoue, Takayoshi Fukui, Shigehisa Tanaka
  • Patent number: 10921619
    Abstract: Embodiments provide for an optical modulator that includes a first silicon region, a polycrystalline silicon region; a gate oxide region joining the first silicon region to a first side of the polycrystalline region; and a second silicon region formed on a second side of the polycrystalline silicon region opposite to the first side, thereby defining an active region of an optical modulator between the first silicon region, the polycrystalline region, the gate oxide region, and the second silicon region. The polycrystalline silicon region may be between 0 and 60 nanometers thick, and may be formed or patterned to the desired thickness. The second silicon region may be epitaxially grown from the polycrystalline silicon region and patterned into a desired cross sectional shape separately from or in combination with the polycrystalline silicon region.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: February 16, 2021
    Assignee: Cisco Technology, Inc.
    Inventors: Alexey V. Vert, Mark A. Webster
  • Patent number: 10903396
    Abstract: A quantum light emitting device includes a carrier substrate, an insulator, a first semiconductor device, a second semiconductor device, a first contact, and a second contact. The quantum light device includes a carrier substrate comprising silicon and configured with an electrically insulating top surface. The quantum light device also includes an insulator configured on the carrier substrate. The quantum light device includes a first semiconductor structure comprising a first semiconductor material configured on the insulator. Further, the quantum light device includes a second semiconductor structure comprising a second semiconductor material configured on the insulator, with an overlap region of the second semiconductor structure electrically coupling with the first semiconductor structure, a dimensional characteristic of the overlap region being configured to limit a photon emission from the overlap region to a single photon.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: January 26, 2021
    Assignees: INTERNATIONAL BUSINESS MACHINES CORPORATION, CAMBRIDGE ENTERPRISE LTD.
    Inventors: Michael Engel, Mathias B. Steiner, Andrea C. Ferrari, Antonio Lombardo, Matteo Barbone, Mete Atature, Carmen Palacios Berraquero, Dhiren Manji Kara, Ilya Goykhman
  • Patent number: 10895765
    Abstract: In a waveguide-type optical modulation element that modulates light by applying radio frequency signals to an electrode, the realization of the additional broadening of the bandwidth by improving the degree of freedom in the design of the electrode is enabled. An optical modulation element, which includes optical waveguides provided in a substrate and electrodes that control light waves propagating through the optical waveguides and modulates light by propagating radio frequency signals to the electrodes, in which the electrodes include conductive layers made of copper or a copper alloy and protective layers made of a material other than copper and a copper alloy.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: January 19, 2021
    Assignees: SUMITOMO OSAKA CEMENT CO., LTD., TOHOKU UNIVERSITY
    Inventors: Tetsuya Fujino, Masayuki Motoya, Tetsuya Goto
  • Patent number: 10895764
    Abstract: An EO phase shifter for modulating an electrical signal onto an optical wave is manufactured using CMOS process tools whereby a waveguide core made of EO material has intimate contacts with its electrodes. Specifically, the waveguide core is made of a Silicon-Rich Silicon Nitride (SRN) material which has a high linear refractive index n and a high third order nonlinear susceptibility. The electrodes are made of P or N doped silicon. Also, polarization of the optical wave is oriented normal to interfaces between the waveguide core and the electrodes. With this combination, the EO phase shifter exhibits high optical confinement, low propagation loss, and a high electro-optic overlap integral for modulation.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: January 19, 2021
    Assignee: VEO, INC.
    Inventors: Rajat Sharma, Chen-Kuo Sun, Robert B. Welstand
  • Patent number: 10871614
    Abstract: One illustrative TE pass polarizer disclosed herein includes an input/output layer, a first buffer layer positioned above at least a portion of the input/output layer, a layer of epsilon-near-zero (ENZ) material positioned above at least a portion of the first buffer layer, and a metal-containing capping layer positioned above at least a portion of the layer of ENZ material.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: December 22, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Yusheng Bian, Ajey Poovannummoottil Jacob
  • Patent number: 10854740
    Abstract: Systems and methods for providing a phase modulator. The methods comprise creating a Field Effect Transistor (FET) by: placing a crystal structure displaying ambipolarity on a substrate comprising an oxide layer and a conductive silicon layer, the conductive silicon layer providing a gating electrical contact for the phase modulator, and forming source and drain electrical contacts on the crystal structure using e-beam lithography and an e-beam evaporator. The methods also comprising: annealing the FET to improve an interface between the crystal structure and the source and drain electrical contacts; and coating the FET with a dielectric layer to reduce or eliminate hysteresis so that a functionality of the phase modulator is improved.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: December 1, 2020
    Assignee: FLORIDA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
    Inventors: Nihar R. Pradhan, Stephen A. Mcgill
  • Patent number: 10831044
    Abstract: In an embodiment, a method and apparatus for increasing bandwidth of an optical modulator by applying a first voltage applied to a beginning of a resistive line and applying a second voltage applied to an end of the resistive line; wherein the first voltage is less than the second voltage.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: November 10, 2020
    Assignee: Acacia Communications, Inc.
    Inventor: Christopher Doerr
  • Patent number: 10809591
    Abstract: An optical phase shifter may include a waveguide core that has a top surface, and a semiconductor contact that is laterally displaced relative to the waveguide core and is electrically connected to the waveguide core. A top surface of the semiconductor contact is above the top surface of the waveguide core. The waveguide core may include a p-type core region and an n-type core region. A p-type semiconductor region may be in physical contact with the n-type core region of the waveguide core, and an n-type semiconductor region may be in physical contact with the p-type core region of the waveguide core. A phase shifter region and a light-emitting region may be disposed at different depth levels, and the light-emitting region may emit light from a phase shifter region that is in a position adjacent to the light-emitting region.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: October 20, 2020
    Assignee: Analog Photonics LLC
    Inventors: Michael R. Watts, Ehsan Shah Hosseini, Christopher Vincent Poulton, Erman Timurdogan
  • Patent number: 10796426
    Abstract: Evaluating a design of a configurable inspection station for inspecting a workpiece, wherein the design of the configurable inspection station has a plurality of changeable parameters and providing a computer vision system that can receive multiple, different inputs each defining a respective region of interest in a simulated image to search for a feature corresponding to an attribute of the workpiece and determine whether the feature corresponding to the attribute is identifiable in each of the respective regions of interest.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: October 6, 2020
    Assignee: The Gillette Company LLC
    Inventors: Brian Joseph Woytowich, Lucy Lin, Jeffrey Michael Mitrou, Gregory David Aviza
  • Patent number: 10795189
    Abstract: An electro-optical phase modulator includes a waveguide made from a stack of strips. The stack includes a first strip made of a doped semiconductor material of a first conductivity type, a second strip made of a conductive material or of a doped semiconductor material of a second conductivity type, and a third strip made of a doped semiconductor material of the first conductivity type. The second strip is separated from the first strip by a first interface layer made of a dielectric material, and the third strip is separated from the second strip by a second interface layer made of a dielectric material.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: October 6, 2020
    Assignee: STMicroelectronics (Crolles 2) SAS
    Inventor: Stephane Monfray
  • Patent number: 10795221
    Abstract: A method of making a two-phase light-transmissive electrode layer comprising a first phase made of a highly electronically-conductive matrix and a second phase made of a polymeric material composition having a controlled volume resistivity.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: October 6, 2020
    Assignee: E Ink Corporation
    Inventors: Richard J. Paolini, Jr., Stephen J. Telfer
  • Patent number: 10790910
    Abstract: Embodiments may relate to an optical modulator system. The optical modulator system may include a first photodiode to measure a first optical level at an output of a Mach-Zehnder modulator (MZM). The system may further include a second photodiode to measure a second optical level at a termination of the MZM. The system may further include a logic coupled with the first photodiode and the second photodiode, the logic to identify a modulator bias that minimizes the first optical level. Other embodiments may be described or claimed.
    Type: Grant
    Filed: December 22, 2018
    Date of Patent: September 29, 2020
    Assignee: Intel Corporation
    Inventors: Hyoung-Jun Kim, Hwee Chin Ong, Sang Yup Kim, Raghuram Narayan, Jeffrey B. Driscoll, Woosung Kim
  • Patent number: 10788688
    Abstract: An electroabsorption modulator. The modulator comprising an SOI waveguide; an active region, the active region comprising a multiple quantum well (MQW) region; and a coupler for coupling the SOI waveguide to the active region. The coupler comprising: a transit waveguide coupling region; a buffer waveguide coupling region; and a taper region; wherein, the transit waveguide coupling region couples light between the SOI waveguide and the buffer waveguide coupling region; and the buffer waveguide coupling region couples light between the transit waveguide region and the active region via the taper region.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: September 29, 2020
    Assignee: Rockley Photonics Limited
    Inventor: Guomin Yu
  • Patent number: 10770313
    Abstract: An integrated fan-out package includes a first redistribution structure, a die, an insulation encapsulation, and a second redistribution structure. The first redistribution structure has a dielectric layer and a feed line disposed on the dielectric layer. The die is disposed on the first redistribution structure. The insulation encapsulation encapsulates the die. The insulation encapsulation has a protrusion laterally wraps around the feed line. The insulation encapsulation has a lower dissipation factor (Df) and/or a lower permittivity (Dk) than the dielectric layer. The second redistribution structure is disposed on the die and the insulation encapsulation.
    Type: Grant
    Filed: April 21, 2019
    Date of Patent: September 8, 2020
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Kai-Chiang Wu, Chung-Hao Tsai, Chun-Lin Lu, Yen-Ping Wang, Che-Wei Hsu
  • Patent number: 10770414
    Abstract: A semiconductor structure includes a first dielectric waveguide, a second dielectric waveguide, a first inter-level dielectric (ILD) material, a first transmitter coupling structure and a second transmitter coupling structure. The first and second dielectric waveguides are disposed one over the other. The first dielectric waveguide is configured to guide a first electromagnetic signal. The second dielectric waveguide is configured to guide a second electromagnetic signal. The first and second electromagnetic signals have different frequencies. The first ILD material is disposed between the first and second dielectric waveguides. The first transmitter coupling structure is configured to couple a first driver signal generated by a transmitter die to the first dielectric waveguide, and accordingly produce the first electromagnetic signal.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: September 8, 2020
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
    Inventors: Wen-Shiang Liao, Huan-Neng Chen
  • Patent number: 10739664
    Abstract: An optical modulator includes: a bottom substrate layer, having a first surface; a traveling-wave electrode, being disposed on the first surface of the bottom substrate layer and including a plurality of ground electrodes and a plurality of signal electrodes between the ground electrode; an optical waveguide disposed inside the bottom substrate layer; and a shield layer, including a substrate and a metal layer, the substrate covering at least a portion of the traveling-wave electrode and the metal layer being disposed on the surface of the substrate facing away from the traveling-wave electrode. Each of the ground electrodes is electrically connected to the metal layer to provide electromagnetic shielding for the signal electrodes between the ground electrodes.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: August 11, 2020
    Assignee: InnoLight Technology (Suzhou) Ltd.
    Inventors: Dongdong Yan, Xiaoyao Li, Zhenzhong Wang
  • Patent number: 10684531
    Abstract: A light beam can be steered using a non-mechanical beam steerer structure. For example, a combination of sub-aperture and full-aperture beam steering structures can be used (e.g., corresponding to regions of controlled variation in an index of refraction). The sub-aperture elements can include tapered structures defining a saw-tooth or triangular footprint in the plane in which the in-plane steering is performed. Respective rows of sub-aperture tapered structures can be configured to controllably steer the light beam in the first in-plane direction, wherein at least one row of sub-aperture tapered structures defines a first base region edge that is tipped at a first specified in-plane angle relative to a second base region edge defined by another row. Use of the tipped configuration can simplify a configuration of the beam steerer structure, such as allowing a configuration lacking a compensation plate at the input.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: June 16, 2020
    Assignee: Analog Devices, Inc.
    Inventors: Michael Ziemkiewicz, Tyler Adam Dunn, Michael Howard Anderson, Scott Robert Davis
  • Patent number: 10598964
    Abstract: To provide a method whereby a bias voltage capable of easily realizing a required extinction ratio can be controlled by utilizing a high-extinction ratio modulator even when a generic AD converter/control board is used, and a device for realizing the method. In the present invention, the step quantity (variation quantity) ?V of a control voltage is no more than 0.1 times the half-wave voltage V? [V]. For example, in the case of searching for the minimum point, the light intensity is measured when a bias that is larger by the step voltage ?V and a bias that is smaller by the step voltage ?V are applied, the current bias voltage being used as a reference, and the bias voltage is moved toward the smaller of the measured light intensities. The process of setting the moved bias voltage as a reference, comparing the light intensities for the bias points in both neighboring positions, and changing the reference bias voltage is then repeated.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: March 24, 2020
    Assignee: National Institute of Information and Communications Technology
    Inventors: Atsushi Kanno, Tetsuya Kawanishi
  • Patent number: 10594404
    Abstract: Described are various embodiments of a dual optical modulator, system and method. In one embodiment, an optical modulator modulates an input optical signal having a designated optical frequency. The modulator comprises first and second tunable modulators operable around the optical frequency and operatively disposed between a bus waveguide path and an opposed waveguide path. The modulator further comprises a relative optical phase-shifter optically coupled between the tunable modulators so to impart a relative optical phase shift between the bus waveguide path and the opposed waveguide path. The tunable modulators are respectively driveable to modulate a respective resonance thereof in complimentary directions relative to the optical frequency and thereby resonantly redirect a selectable portion of the input optical signal along the opposed waveguide path such that the relative optical phase shift is imparted thereto for output.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: March 17, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Thomas Wetteland Baehr-Jones, Michael J. Hochberg, Yang Liu
  • Patent number: 10591670
    Abstract: In an optical waveguide element, an optical waveguide is formed on a substrate, the optical waveguide has a main waveguide that propagates signal light, a waveguide for unnecessary light that guides unnecessary light released from the main waveguide, and a waveguide for collecting unnecessary light to which the unnecessary light emitted from the waveguide for unnecessary light is introduced, the waveguide for unnecessary light is connected to the waveguide for collecting unnecessary light via a waveguide for connection, and a width of the waveguide for connection, which is a width in a direction that perpendicularly intersects a propagation direction of the unnecessary light, at a portion connected to the waveguide for collecting unnecessary light is set to be wider than a width at a portion connected to the waveguide for unnecessary light with the waveguide for connection.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: March 17, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yu Kataoka, Norikazu Miyazaki
  • Patent number: 10578594
    Abstract: A sensing and analysis system on a chip for sensing and analyzing chemical or biological analytes includes a chromatography column having an inlet and an outlet formed on the chip for temporal separation of components of analytes and at least one whispering gallery mode (WGM) optical resonator for sensing of the components. The chromatography column is formed on a first wafer layer. Each WGM optical resonator includes a hollow sealed enclosure formed at or over the inlet or the outlet of or elsewhere along the chromatography column such that a gas flowing through the chromatography column fills the hollow sealed enclosure. Each WGM optical resonator further includes an optical waveguide aligned with the sealed hollow enclosure for evanescent wave light coupling.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: March 3, 2020
    Assignee: The Penn State Research Foundation
    Inventors: Srinivas Tadigadapa, Eugene Freeman, Chenchen Zhang
  • Patent number: 10566764
    Abstract: A plasmonic quantum well laser may be provided. The plasmonic quantum well laser includes a plasmonic waveguide and a p-n junction structure extends orthogonally to a direction of plasmon propagation along the plasmonic waveguide. Thereby, the p-n junction is positioned atop a dielectric material having a lower refractive index than material building the p-n junction, and the quantum well laser is electrically actuated. A method for building the plasmonic quantum well laser is also provided.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: February 18, 2020
    Assignee: International Business Machines Corporation
    Inventors: Heinz Schmid, Benedikt F. Mayer, Stephan Wirths, Kirsten Emilie Moselund
  • Patent number: 10514587
    Abstract: To provide an optical comb generation device and an optical comb signal generation method capable of stably generating an optical comb signal having an optical frequency interval exceeding the drive electric signal band of a modulator.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: December 24, 2019
    Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY
    Inventors: Takahide Sakamoto, Naokatsu Yamamoto, Atsushi Matsumoto
  • Patent number: 10491206
    Abstract: Van der Waals heterojunctions are extended to semiconducting p-type single-walled carbon nanotube (s-SWCNT) and n-type film that can be solution-processed with high spatial uniformity at the wafer scale. The resulting large-area, low-voltage p-n heterojunctions can exhibit anti-ambipolar transfer characteristics with high on/off ratios. The charge transport can be efficiently utilized in analog circuits such as frequency doublers and keying circuits that are widely used, for example, in telecommunication and wireless data transmission technologies.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: November 26, 2019
    Assignee: Northwestern University
    Inventors: Deep M. Jariwala, Vinod K. Sangwan, Weichao Xu, Hyungil Kim, Tobin J. Marks, Mark C. Hersam
  • Patent number: 10473999
    Abstract: In an optical modulator including an FPC for performing electrical connection with an external circuit substrate, to maintain high light transmission quality by appropriately driving the optical modulator even when the reflection of a radio frequency signal occurs in a connection portion between the FPC and the main body of the optical modulator. Provided is an optical modulator including a flexible printed circuit for performing electrical connection with a circuit substrate, in which the flexible printed circuit includes at least one wire pattern for propagating a radio frequency signal, and the wire pattern includes at least one radio frequency attenuation portion for attenuating power of the radio frequency signal by a predetermined amount.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: November 12, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 10466418
    Abstract: The invention provides an apparatus for optical integrated on-chip generation of photon pairs as a building block to create entangled photon states required for quantum information processing. The invention provided a frequency selective optical coupling device which controls the transmission of light by varying the relative dimensions of otherwise symmetrical linear optical waveguides tangential to an annular optical waveguide, thereby controlling the coupling of light between the linear optical waveguides and the annular optical waveguide. Dimensional change of the optical waveguides is achieved by a heated medium in proximity of the optical waveguides and under electronic control.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: November 5, 2019
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Michael L. Fanto, Paul M. Alsing, Christopher C. Tison, Stefan F. Preble, Jeffrey A. Steidle
  • Patent number: 10461853
    Abstract: In example implementations, an optical gate is provided. The optical gate receives at least one optical signal via a waveguide of an optical memory gate. The optical gate compares a wavelength of the at least one optical signal to a resonant wavelength associated with a resonator. When the wavelength of the at least one optical signal matches the resonant wavelength, a value that is stored in the resonator is read out via the at least one optical signal. Then, the at least one optical signal with the value that is read out is transmitted out of the optical gate.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: October 29, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Nikolas A. Tezak, David Kielpinski, Jason Pelc, Thomas Van Vaerenbergh, Ranojoy Bose, Raymond G. Beausoleil
  • Patent number: 10416526
    Abstract: An object of the invention is to provide an optical waveguide device which is able to efficiently absorb or remove leaked light propagating in a substrate. An optical waveguide device in which an optical waveguide is formed on a substrate, in which the optical waveguide includes a main waveguide through which signal light propagates, and a metal layer (a bonding layer or an electrode) is formed, through a high refractive index layer having a refractive index higher than the refractive index of the substrate, in at least a part of a region on which the main waveguide is not formed.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: September 17, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventor: Katsutoshi Kondou
  • Patent number: 10374394
    Abstract: A core-shell nanowire laser structure comprises a substrate (12), an elongated support element (14) extending from the substrate, the support element having a first diameter, and an elongated body element (16) extending on and/or around the support element, the body element having a second diameter at least two times larger than the first diameter, wherein the body element is spaced apart from the substrate.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: August 6, 2019
    Assignee: Technische Universitaet Muenchen
    Inventors: Benedikt Mayer, Gregor Koblmueller, Jonathan Finley, Johannes Klicpera, Gerhard Abstreiter
  • Patent number: 10371968
    Abstract: A modulator may include a substrate. The modulator may include one or more waveguides formed upon or formed in the substrate. A signal electrode may be provided adjacent to at least one of the one or more waveguides and may include a curved outer surface. The modulator may include one or more ground electrodes provided adjacent to the signal electrode. Each ground electrode, of the one or more ground electrodes, may include a respective curved inner surface that is radially spaced from the curved outer surface of the signal electrode. The one or more ground electrodes and the substrate may at least substantially enclose the curved outer surface of the signal electrode.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: August 6, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Gregory J. McBrien, Karl Kissa
  • Patent number: 10365536
    Abstract: An optical device may include a monolithic body of optical material including an optical signal port, an optical coupler/splitter portion including a plurality of optical couplers/splitters arranged in a planar configuration and coupled to the optical signal port, and a phase modulation portion including a plurality of phase shifters arranged in a planar configuration and coupled to respective ones of the plurality of optical couplers/splitters. The monolithic body may also include a fanning-array portion including a plurality of optical waveguides extending from the phase modulation portion in a planar configuration and fanning to a two-dimensional array on an edge of the monolithic body.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: July 30, 2019
    Assignee: EAGLE TECHNOLOGY, LLC
    Inventors: Micah H. Jenkins, Christopher J. Carron, Charles F. Middleton
  • Patent number: 10359684
    Abstract: Disclosed herein is an optical waveguide element that includes a substrate and a waveguide layer formed on the substrate and comprising lithium niobate. The waveguide layer has a slab part having a predetermined thickness and a ridge part protruding from the slab part. The maximum thickness of the slab part is 0.05 times or more and less than 0.4 times a wavelength of a light propagating in the ridge part.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: July 23, 2019
    Assignee: TDK CORPORATION
    Inventors: Shinji Iwatsuka, Kenji Sasaki, Satoshi Shirai
  • Patent number: 10310299
    Abstract: A substrate (102) having a piezoelectric effect, optical waveguides (138a, 140a, 138b, 140b, and the like) formed on the substrate, and a plurality of bias electrodes (152a, 152b, and the like) that control an optical wave (s) which propagate through the optical waveguides are provided, and the bias electrodes are constituted and/or disposed such that an electrical signal applied to one of the bias electrodes is prevented from being received by another one of the bias electrodes through a surface acoustic wave.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: June 4, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventor: Toru Sugamata
  • Patent number: 10305601
    Abstract: An optical system includes an optical transmitter having optical transmission channels and an optical receiver having optical reception channels. The optical transmission channels are successively tuned to resonant wavelengths at which lowest transmission channel input currents result in transmission channel output current peaks greater than a threshold. The optical reception channels are tuned to the resonant wavelengths after the optical transmission channels are tuned. Each resonant wavelength has the optical reception channel tuned thereto that has a highest reception channel output current peak at a lowest reception channel input current when the optical transmission channel tuned to the resonant wavelength is temporarily detuned.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: May 28, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Ashkan Seyedi