Patents Examined by Hemang Sanghavi
  • Patent number: 10018888
    Abstract: Improved optical interferometric modulators have a small waveguide spacing so that the waveguide pair are close to the central electrode, to enhance electro-optic interaction. Asymmetric waveguides with differential indices are used to effectively de-couple the waveguide pair. Multiple sections of asymmetric waveguide pairs with alternating differential indices are used to achieve chirp-free operation. Another version of the device utilizes transmission-line electrode that weave closer to one of the waveguide pair alternately between sections. Another version of the device utilizes waveguide structure that one of the waveguide is closer to the central electrode in alternate section. To improve efficiency further, a DC bias is provided on the outer electrodes configured as an RF-ground but DC-float electrodes. Another improvement is to have a slot is cut underneath the waveguide region to effectively reduce to thickness of the substrate. These improvements lead to higher modulator efficiency.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: July 10, 2018
    Assignee: EOSpace, Inc.
    Inventor: Suwat Thaniyavarn
  • Patent number: 9846348
    Abstract: Efficient harmonic light generation can be achieved with ultrathin films by coupling an incident pump wave to an epsilon-near-zero (ENZ) mode of the thin film. As an example, efficient third harmonic generation from an indium tin oxide nanofilm (?/42 thick) on a glass substrate for a pump wavelength of 1.4 ?m was demonstrated. A conversion efficiency of 3.3×10?6 was achieved by exploiting the field enhancement properties of the ENZ mode with an enhancement factor of 200. This nanoscale frequency conversion method is applicable to other plasmonic materials and reststrahlen materials in proximity of the longitudinal optical phonon frequencies.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: December 19, 2017
    Assignee: National Technology & Engineering Solutions of Sandia, LLC
    Inventors: Ting S. Luk, Michael B. Sinclair, Salvatore Campione
  • Patent number: 9841557
    Abstract: The invention relates to a microstructured optical fiber for generating incoherent supercontinuum light upon feeding of pump light. The microstructured optical fiber has a first section and a second section. A cross-section through the second section perpendicularly to a longitudinal axis of the fiber has a second relative size of microstructure elements and preferably a second pitch that is smaller than a blue edge pitch for the second relative size of microstructure elements. The invention also relates to an incoherent supercontinuum source comprising a microstructured optical fiber according to the invention.
    Type: Grant
    Filed: July 7, 2014
    Date of Patent: December 12, 2017
    Assignee: NKT PHOTONICS A/S
    Inventors: Jeppe Johansen, Ole Bang, Casper Larsen, Thomas Feuchter, Carsten L. Thomsen, Thomas Vestergaard Andersen
  • Patent number: 9798219
    Abstract: A photon source to deliver single photons includes a storage ring resonator to receive pump photons and generate a signal photon and an idler photon. An idler resonator is coupled to the storage resonator to couple the idler photon out of the storage resonator and into a detector. Detection of the idler photon stops the pump photons from entering the storage resonator. A signal resonator is coupled to the storage resonator to couple out the signal photon remaining in the storage resonator and delivers the signal photon to applications. The photon source can be fabricated into a photonic integrated circuit to achieve high compactness, reliability, and controllability.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: October 24, 2017
    Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Mihir Pant, Dirk Robert Englund, Mikkel Heuck
  • Patent number: 9798164
    Abstract: An electro-optic device 200 comprising a substrate in which first and second waveguides 202, 203 are formed. The device also comprises first and second electrodes 204, 205 comprising an optically transparent conductive material and including primary portions 204a, 205a overlying the first and second waveguides 202, 203 for electrically biasing the first and second waveguides. The device is configured such that one of the first and second electrodes includes one other portion 204b, 205b arranged alongside the primary portion 204a, 205a of the other of the first and second electrodes. This arrangement improves the electro-optic efficiency of the device without the need for a buffer layer in the electrodes.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: October 24, 2017
    Assignee: Oclara Technology Limited
    Inventors: Stefano Balsamo, Marco Villa, Michele Belmonte
  • Patent number: 9791651
    Abstract: New optical ground wire (OPGW) cable structures are proposed. These OPGW cables are designed to reduce or minimize the net magnetic field B?NET parallel to the direction {circumflex over (z)} of light propagation resulting from a lightning strike on the cable. A reduction in the net magnetic field B?NET parallel to the direction {circumflex over (z)} of light propagation yields a reduction in the amount and speed of state of polarization (SOP) rotation resulting from a lightning strike on the cable due to the Faraday effect. OPGW cables constructed according to these new OPGW cable structures fulfill their dual function to shield the high-voltage conductors from lightning strikes and to support coherent optical communications.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: October 17, 2017
    Assignee: Ciena Corporation
    Inventor: David Raymond Doucet
  • Patent number: 9785039
    Abstract: A wavelength conversion member includes a substrate, a dichroic mirror layer, an SiO2 layer, a ZnO layer, and a phosphor layer, which are sequentially stacked from the substrate. The dichroic mirror layer reflects at least part of light incident from the above. The phosphor layer includes a plurality of phosphors and ZnO between the phosphors.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: October 10, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGMENT CO., LTD.
    Inventors: Atsushi Motoya, Kenta Watanabe, Ran Zheng, Sachiko Azuma, Yoshihisa Nagasaki, Takahiro Hamada, Mitsuru Nitta, Takashi Maniwa, Toshio Mori, Kazuhiro Matsuo
  • Patent number: 9762025
    Abstract: Apparatuses and methods for a temperature insensitive electro-absorption modulator and laser. The device comprising a laser capable of emitting light. The laser itself includes a laser gain section, a first mirror and a second mirror. Each of the mirrors are coupled to the laser gain section. The laser gain section contains quantum wells. The first mirror and the second mirror have a wavelength bandwidth sufficient for a lasing wavelength range of the laser. A modulator is coupled to the laser to receive the light and is capable of modulating the light to vary the output from the modulator. The modulator contains quantum wells and has a quantum well confinement factor that is greater than 0.1. An output coupler is coupled to the modulator and the output coupler has a back reflection that is less than half of a back reflection of the second mirror. The laser has a lasing wavelength that tracks the absorption spectrum of the modulator.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: September 12, 2017
    Assignee: TeraMod LLC
    Inventors: Ralph Herbert Johnson, Gary Alan Evans
  • Patent number: 9753221
    Abstract: An optical coupler is used to optically couple a multicore fiber with multiple optical cores to multiple individual fibers and contains a support in which the multicore fiber is embedded, the cores exiting at a polished end surface. The cores are assembled into groups along lines, and each group is oriented along a line. Waveguides of multiple planar support elements, the waveguides being introduced into the surface of the support elements, are connected to the end surface, each group of cores being coupled into a support element. In this manner, the multicore fiber can be coupled to individual fibers using planar waveguide technology.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: September 5, 2017
    Assignee: LEONI Kabel Holding GmbH
    Inventors: Peggy Baerenklau, Lothar Brehm, Maria Kufner, Stefan Kufner
  • Patent number: 9753352
    Abstract: The present invention includes a fundamental laser light source configured to generate fundamental wavelength laser light, a first nonlinear optical crystal configured to generate first alternate wavelength light, a second nonlinear optical crystal configured to generate second alternate wavelength light, a set of Brewster angle wavefront processing optics configured to condition the first and second alternate wavelengths of light, and a harmonic separator configured to receive the first alternate wavelength light and the second alternate wavelength light from the set of Brewster angle wavefront processing optics, the harmonic separator configured to at least partially separate the first alternate wavelength light from the second alternate wavelength light.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: September 5, 2017
    Assignee: KLA-Tencor Corporation
    Inventor: J. Joseph Armstrong
  • Patent number: 9746633
    Abstract: Clamp and Bending Strain Relief (BSR) system and method are disclosed. One example of a system can include a clamp coupled to a cable. The clamp is configured to couple an apparatus to the cable while allowing the cable to pass continuously through the clamp. A BSR apparatus is coupled to the clamp and the cable by a housing.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: August 29, 2017
    Assignee: PGS Geophysical AS
    Inventors: Matthew Segsworth, Robert Alexis Peregrin Fernihough, Jeremy Crane Smith
  • Patent number: 9739968
    Abstract: The present invention provides an access terminal box component, including a mounting plate and a fiber optic terminal base, where the fiber optic terminal base is mounted on the mounting plate; the fiber optic terminal base is configured to carry a fiber; the mounting plate is configured to mount the fiber optic terminal base on a preset position; a first locking slot and a second locking slot that are arranged opposite to each other are disposed on the mounting plate; a first locking hook is arranged at a position that is corresponding to the first locking slot and on the fiber optic terminal base, so as to be connected to the first locking slot by means of locking. The present invention improves detaching efficiency, and avoids damage to a part and a fiber on the fiber optic terminal base.
    Type: Grant
    Filed: March 28, 2016
    Date of Patent: August 22, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Deyi Shi, Yeren Wang, Anliang Yang
  • Patent number: 9735523
    Abstract: An example universal contact assembly includes plug contact members and a sensing contact member that are overmolded together to form a single unit. Example adapter block assembly include a first optical adapter; a first contact assembly disposed in an aperture defined in the first optical adapter; a first circuit board; and a retainer arrangement that holds the first circuit board to the first optical adapter with sufficient force to retain the first contact assembly within the aperture. Example retainer arrangements include a cover having flanges with tabs that deflect into cavities defined by the first optical adapter; clamp members that clamp a cover to the first optical adapter to hold the first circuit board therebetween; and a retention strip having barbs that attach to the first optical adapter and barbs that attach to the first printed circuit board.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: August 15, 2017
    Assignees: CommScope Connectivity UK Limited, CommScope Technologies LLC
    Inventors: Christopher Taylor, Cyle D. Petersen
  • Patent number: 9726914
    Abstract: Preferable simultaneous achievement of the target characteristics with respect to both of the modulation bandwidth and the extinction ratio in the optical intensity modulation using the electro-absorption optical modulator is realized with a simple circuit configuration. The modulator integrated semiconductor laser element includes a plurality of EA modulators disposed in series in an optical signal path, and each adapted to absorb light in accordance with an applied voltage. The modulator driver for supplying the EA modulator with the applied voltage is provided for each of the EA modulators. The plurality of modulator drivers generates the applied voltage common to the plurality of EA modulators in accordance with a control signal. The modulator lengths of the plurality of EA modulators are set so that the closer to the light source the EA modulator is, the shorter the modulator length is.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: August 8, 2017
    Assignee: OCLARO JAPAN, INC.
    Inventors: Atsushi Nakamura, Shunya Yamauchi, Noriko Sasada, Takayoshi Fukui, Nozomu Yasuhara
  • Patent number: 9715123
    Abstract: An apparatus and method for despeckling that includes a pulsed green laser, a green laser diode assembly, and stimulated Raman scattering light formed in an optical fiber. The stimulated Raman scattering light is divided into green light and red light. The green light from the stimulated Raman scattering is combined with the green laser diode assembly to form a green primary light. The red light from the stimulated Raman scattering light forms a red primary light. The green primary light and the red primary light are used to project a digital image.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: July 25, 2017
    Assignee: Laser Light Engines, Inc.
    Inventors: John Arntsen, Barret Lippey
  • Patent number: 9711931
    Abstract: A simultaneous temperature- and wavelength-insensitive parametric amplifier comprising a pump laser, a signal laser, and a crystal amplifier. The pump laser system on a first optical pathway includes a Nd:YVO4 laser oscillator-regenerative amplifier and a Nd:YAG boost amplifier. The pump laser beam is generated from the pump laser system, passes through the first image-relay system, and is frequency-doubled in the frequency-doubling crystal. The signal laser system on a second optical pathway comprises a Ti:sapphire regenerative amplifier and generates the signal laser beam, which passes through the pulse stretcher and is temporally chirped and imposed with an angular dispersion by the first grating. The chirped signal beam and pump laser beam are intersected with a noncollinear angle of >5° in the crystal amplifier for temperature-insensitive phase-matching (PM).
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: July 18, 2017
    Assignee: Shanghai Jiao Tong University
    Inventors: Liejia Qian, Daolong Tang, Jingui Ma, Jing Wang, Bingjie Zhou, Peng Yuan, Guoqiang Xie
  • Patent number: 9711939
    Abstract: Provided herein is a semiconductor optical device, including a waveguide including lattices buried therein and having a buried hetero (BH) structure formed in an optical oscillation region in which single mode light is oscillated, a waveguide having a deep ridge structure formed in an optical modulation region, and a passive waveguide formed in a mode transition region interposed between the optical oscillation region and the optical modulation region, formed as a connecting structure of the waveguide having the BH structure extending from the optical oscillation region and the waveguide having the deep ridge structure extending from the optical modulation region, and inducing evanescent optical coupling, wherein a width of the waveguide having the BH structure in the mode transition region is smaller than a width of the waveguide having the deep ridge structure in the optical modulation region.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: July 18, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Dong Hun Lee, Sang Ho Park, Yong Soon Baek, Jang Uk Shin, Young Tak Han
  • Patent number: 9712898
    Abstract: Embodiments of the present disclosure provide arrangements for aggregating network traffic of compute nodes of various computing sleds of computing trays of a computing rack assembly in a data center. In one embodiment, a computing rack assembly may include a plurality of computing trays. A computing tray may removably include a number of sleds. Each sled may include a number of compute nodes. The computing tray may further include an optical network aggregation component to aggregate network traffic of the compute nodes of various sleds of a computing tray. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: July 18, 2017
    Assignee: Intel Corporation
    Inventors: Terrence Trausch, Gabriel C. Cox, James T. Langston, Jr., Guy L. Williams
  • Patent number: 9696507
    Abstract: An inventive opto-electric hybrid board includes: opto-electric module portions respectively defined on opposite end portions of an elongated insulation layer, and each including a first electric wiring of an electrically conductive pattern and an optical element provided on a front surface of the insulation layer; and an interconnection portion defined on a portion of the insulation layer extending from the opto-electric module portions, and including an optical waveguide optically coupled with the optical elements. A metal reinforcement layer provided on a back surface of the insulation layer as extending over the opto-electric module portions into the interconnection portion. A portion of the metal reinforcement layer present the interconnection portion has a smaller width than the opto-electric module portions, and the smaller width portion has rounded proximal corners.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: July 4, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Naoki Shibata, Yuichi Tsujita
  • Patent number: 9698562
    Abstract: In a laser device, a different refractive index region 6B of a photonic crystal layer is arranged at a lattice point position of a square lattice. In the case where a plane shape of the different refractive index regions 6B is a nearly isosceles right triangle, two sides forming a right angle extend along longitudinal and horizontal lateral lines of the square lattice. A direction parallel to or vertical to an oblique side of the triangle and a direction of polarization in the periodic polarization inversion structure of a nonlinear optical crystal NL are the same.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: July 4, 2017
    Assignees: Kyoto University, HAMAMATSU PHOTONICS K.K.
    Inventors: Akiyoshi Watanabe, Kazuyoshi Hirose, Yoshitaka Kurosaka, Takahiro Sugiyama, Susumu Noda