Optical Modulator Patents (Class 359/237)
  • Patent number: 10352819
    Abstract: A image acquisition device comprises a light source unit, a digital micro mirror, an optical transfer medium, an imaging unit, and a beam splitter, wherein a single focusing pattern light is formed to be focused on a single specific point when the focusing pattern light penetrates the optical transfer medium, and specific points focused by each of the plurality of focusing pattern lights scan the object to be measured such that the object to be measured is imaged. Therefore, when an image is obtained through an optical transfer medium such as an optical fiber, pixelation and aberration can be avoided regardless of the type of optical transfer medium and an image having high resolution can be obtained fast without a separate scanner.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: July 16, 2019
    Assignee: Korea University Research and Business Foundation
    Inventors: Won-Shik Choi, Dong-Gyu Kim
  • Patent number: 10340051
    Abstract: Radioisotope production system includes an electrical field system and a magnetic field system that are configured to direct a particle beam of charged particles along a beam path within an acceleration chamber. The magnetic field system is energized by a drive current to generate a magnetic flux into the acceleration chamber for controlling the particle beam. The radioisotope production system also includes a target system configured to hold a target material and receive the particle beam. The radioisotope production system also includes a monitoring system that is configured to: (a) determine an operating parameter of the radioisotope production system as the particle beam is directed toward the target material and (b) change the drive current, thereby changing the magnetic flux, based on the operating parameter.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: July 2, 2019
    Assignee: General Electric Company
    Inventors: Martin Pärnaste, Mikael Carlbom, Rickard Ericson, John Melin
  • Patent number: 10330918
    Abstract: A display device includes a first support plate and a second support plate. A pixel region between the first support plate and the second support plate includes a plurality of pixel wall portions over the first support plate forming a perimeter of the pixel region. A first liquid and a second liquid that is immiscible with the first liquid are disposed in the pixel region. A light-blocking layer is disposed on an inner surface of the second support plate. The light-blocking layer includes a light-blocking portion positioned over a first pixel wall portion of the plurality of pixel wall portions. An electrically conductive layer comprising an electrically conductive portion is disposed on a first surface of the light-blocking portion. A recessed region is aligned with the electrically conductive portion such that a portion of the second liquid disposed within the recessed region contacts the electrically conductive portion.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: June 25, 2019
    Assignee: Amazon Technologies, Inc.
    Inventor: Toru Sakai
  • Patent number: 10324355
    Abstract: Disclosed herein are various improvements in optical switching engines. In one aspect, a range of switching engines includes various multiple bounce, multiple image devices, such as, for example, the Herriott Cell and the Robert Cell. In another aspect, liquid crystal spatial light modulators (SLMs) are used in the switching engine of an optical cross-connect. In another aspect, polarization gratings (PGs) are used in the switching engine. In another aspect, a switching engine includes a Fourier cell using SLMs with more than two states. Alternative imaging optics in a Fourier cell implementing a multiple-bounce, multiple image device are also disclosed.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: June 18, 2019
    Assignee: OHIO STATE INNOVATION FOUNDATION
    Inventors: David Rabb, Betty Lise Anderson
  • Patent number: 10291165
    Abstract: A method of detecting a permanent magnet rotor of a synchronous machine, includes: injecting a voltage waveform to the stator windings of the synchronous machine, measuring two phase currents in the stator winding, transforming the two phase currents to a rotor reference frame to obtain a current waveform, sampling the current waveform to obtain positive and negative portion values, constructing first and second periodic waveforms by using the sampled positive and negative portion values, performing a frequency analysis of a first and second spectrums of the periodic waveforms, and determining whether a permanent magnet is present in the synchronous machine based on the spectrums.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: May 14, 2019
    Assignee: ABB Schweiz AG
    Inventors: Paul Sandulescu, Giovanni Zanuso, Luca Peretti
  • Patent number: 10274806
    Abstract: Laser-drilling apparatus includes a gas-discharge for laser emitting laser-radiation pulses, and two acousto-optic modulators (AOMs). The laser radiation pulses are characterized as having two temporal central portions between temporal leading and trailing edge portions. The AOMs are arranged to spatially separate the central temporal portions of the pulses from each other and from the leading and trailing edge portions of the pulses.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: April 30, 2019
    Assignee: Coherent, Inc.
    Inventors: Gongxue Hua, Eric R. Mueller, Lanny Laughman
  • Patent number: 10267954
    Abstract: A near eye display device and method are provided. The near eye display device including: a display panel and a lens module. The display panel includes a plurality of display areas arranged in an array, each of the display areas includes at least one pixel unit; and the lens module includes a plurality of micro-lenses arranged in an array, which include a plurality of deflection micro-lenses, an end of the deflection micro-lenses close to a center of the lens module is closer to the display panel than an end of the deflection micro-lenses far away from the center of the lens module, each of the display areas corresponds to at least one of the micro-lenses, and an adjacent portion of two adjacent display areas of the display areas corresponds to two different micro-lenses of the micro-lenses, and the two different micro-lenses include at least one of the deflection micro-lenses.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: April 23, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Can Wang, Yafeng Yang, Jian Gao, Can Zhang, Xinli Ma, Wei Wang, Jifeng Tan, Xiaochuan Chen
  • Patent number: 10250333
    Abstract: Provided is an optical communication system capable of suppressing the deterioration of an intensity waveform of an optical intensity modulated signal subjected to transformation using SSB modulation and improving a bit error ratio and a receiver sensitivity of the optical intensity modulated signal. The optical communication system includes: an optical transmitter section including: a single-side band modulation circuit configured to subject a double-side band modulated signal to generate a single-side band modulated signal; a correction circuit configured to correct an intensity of the single-side band modulated signal so that the intensity of the single-side band modulated signal becomes closer to an intensity of the double-side band modulated signal; and an optical IQ modulator configured to output an optical modulated signal; and an optical receiver section configured to receive the optical modulated signal to directly detect an intensity component of the optical modulated signal.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: April 2, 2019
    Assignee: Oclaro Japan, Inc.
    Inventor: Nobuhiko Kikuchi
  • Patent number: 10247997
    Abstract: A switchable hydride smart window solid thin film coating having variable opacity and the methods for producing the same is described. The coating includes the following layers deposited on substrate such as glass: a switchable layer, an optional barrier layer, a catalyst layer, an optional barrier layer, a solid electrode, an ion storage layer, an optional insulating layer and a transparent conductor layer. The switchable layer is preferably formed of a magnesium alloy and ore preferable, a ternary alloy of magnesium along with two additional rare earth metals such as yttrium (Y) and Titanium (Ti), i.e., MgYTi.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: April 2, 2019
    Assignee: CARDINAL CG COMPANY
    Inventors: Keith James Burrows, Klaus H. W. Hartig, Daniel J. Plaggemeyer
  • Patent number: 10234677
    Abstract: An electrowetting display device includes light steering structures that direct incoming light away from pixel walls. According to some configurations, transparent or semi-transparent pixel walls are shielded from incoming light by a black matrix (BM) material in a color filter plate and by the light steering structures. Instead of the incoming light being completely blocked by the black matrix, at least a portion of the incoming light that would have been blocked by the black matrix is directed by one or more of the light steering structures to an area of the pixel such that the brightness of the pixel is increased.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: March 19, 2019
    Assignee: Amazon Technologies, Inc.
    Inventors: Tulasi Sridhar Reddy Guntaka, Karel Johannes Gerhardus Hinnen
  • Patent number: 10234703
    Abstract: An optical modulator uses an optoelectronic phase comparator configured to provide, in the form of an electrical signal, a measure of a phase difference between two optical waves. The phase comparator includes an optical directional coupler having two coupled channels respectively defining two optical inputs for receiving the two optical waves to be compared. Two photodiodes are configured to respectively receive the optical output powers of the two channels of the directional coupler. An electrical circuit is configured to supply, as a measure of the optical phase shift, an electrical signal proportional to the difference between the electrical signals produced by the two photodiodes.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: March 19, 2019
    Assignee: STMICROELECTRONICS SA
    Inventor: Jean-Robert Manouvrier
  • Patent number: 10228604
    Abstract: Systems, methods, and computer-readable media are disclosed for borderless display stacks for use with electronic devices. In one embodiment, a display stack may include a thin film transistor (TFT) layer comprising an active area, an electrophoretic layer coupled to the TFT backplane, and an electrode coupled to a perimeter portion of the electrophoretic layer. The electrode may extend beyond peripheral edges of the electrophoretic layer. A portion of the electrode may be positioned between the electrophoretic layer and the TFT backplane, and the electrode may surround the active area. The display stack may include a cover layer coupled to the electrophoretic layer.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: March 12, 2019
    Assignee: Amazon Technologies, Inc.
    Inventors: Hany Mounir Ghali, Robert Arthur Sprague, Siddharth Gupta
  • Patent number: 10225529
    Abstract: A projection device is provided for finally displaying a clear desired target image while shortening time until the target image is displayed, the projection device including: a light source; a spatial modulation element reflecting light from the light source by a display unit displaying a phase distribution of a target image; a modulation element control means that performs, in parallel by different arithmetic units, first processing of generating a phase distribution of the target image and second processing of generating a phase distribution of the target image by processing with a calculation cost higher than the first processing, and displays a phase distribution generated by the second processing on a display surface of the spatial modulation element after displaying a phase distribution generated by the first processing on a display surface of the spatial modulation element; and a projection means that projects reflected light from the spatial modulation element.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: March 5, 2019
    Assignee: NEC CORPORATION
    Inventor: Fujio Okumura
  • Patent number: 10209540
    Abstract: Methods and systems for a low-parasitic silicon high-speed phase modulator are disclosed and may include fabricating an optical phase modulator that comprises a PN junction waveguide formed in a silicon layer, wherein the silicon layer may be on an oxide layer and the oxide layer may be on a silicon substrate. The PN junction waveguide may have p-doped and n-doped regions on opposite sides along a length of the PN junction waveguide, and portions of the p-doped and n-doped regions may be removed. Contacts may be formed on remaining portions of the p-doped and n-doped regions. Portions of the p-doped and n-doped regions may be removed symmetrically about the PN junction waveguide. Portions of the p-doped and n-doped regions may be removed in a staggered fashion along the length of the PN junction waveguide. Etch transition features may be removed along the p-doped and n-doped regions.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: February 19, 2019
    Assignee: Luxtera, Inc.
    Inventors: Ali Ayazi, Gianlorenzo Masini, Subal Sahni, Attila Mekis, Thierry Pinguet
  • Patent number: 10199793
    Abstract: A method of pumping an optical resonator includes directing light generated by a pumping light at the optical resonator, exciting a propagating surface state of the optical resonator at an interface of the optical resonator, and changing a propagating frequency of the light proximate the interface, where the changed frequency corresponds to a propagation frequency of the surface state. The optical resonator includes a photonic crystal and a material, where the interface is formed between the photonic crystal and the material.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: February 5, 2019
    Assignee: Elwha LLC
    Inventors: Jeffrey A. Bowers, William D. Duncan, Roderick A. Hyde, Jordin T. Kare, Nathan Kundtz, Ruopeng Liu, Bruce M. McWilliams, John B. Pendry, Daniel A. Roberts, David Schurig, David R. Smith, Clarence T. Tegreene, Lowell L. Wood, Jr.
  • Patent number: 10187158
    Abstract: Provided is an optical communication system capable of suppressing the deterioration of an intensity waveform of an optical intensity modulated signal subjected to transformation using SSB modulation and improving a bit error ratio and a receiver sensitivity of the optical intensity modulated signal. The optical communication system includes: an optical transmitter section including: a single-side band modulation circuit configured to subject a double-side band modulated signal to generate a single-side band modulated signal; a correction circuit configured to correct an intensity of the single-side band modulated signal so that the intensity of the single-side band modulated signal becomes closer to an intensity of the double-side band modulated signal; and an optical IQ modulator configured to output an optical modulated signal; and an optical receiver section configured to receive the optical modulated signal to directly detect an intensity component of the optical modulated signal.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: January 22, 2019
    Assignee: OCLARO JAPAN, INC.
    Inventor: Nobuhiko Kikuchi
  • Patent number: 10185205
    Abstract: Ring modulators based on interdigitated junctions may be driven in full or partial standing wave mode and, active regions (providing the modulation) and light-absorptive regions (e.g. providing electrical conduction) are placed in a pattern inside a resonant cavity in order to match the maxima and minima of the optical field, respectively. The pattern may be periodic to match the periodicity of a typical electromagnetic field which is periodic with the wavelength. It may also be aperiodic in the case that the cross-section or materials are engineered along the direction of propagation such that the propagation constant (and thus wavelength, i.e. optical wave “local periodicity”) change along the propagation direction.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: January 22, 2019
    Assignee: The Regents of the University of Colorado, a body
    Inventors: Milos Popovic, Fabio Pavanello
  • Patent number: 10184901
    Abstract: A method for designing a filter to image a feature on a surface, comprising: acquiring an image of said feature, with said image of feature comprising information from multiple points of said feature; generating a structural model of said feature by extracting predetermined properties of said feature from said image of feature; computing a scattering model for said feature from said structural model of said feature, with said scattering model for feature having information on scattered electromagnetic field from feature propagating in a plurality of scattering angles, wherein said scattered electromagnetic field from feature is generated by scattering of an electromagnetic radiation by said feature; acquiring an image of said surface, with said image of surface comprising information from multiple points of said surface; generating a structural model of said surface by extracting predetermined properties of said surface from said image of surface; computing a scattering model for said surface from said struct
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: January 22, 2019
    Assignee: Exnodes Inc.
    Inventor: Sri Rama Prasanna Pavani
  • Patent number: 10143041
    Abstract: Provided are a wireless access system provided with a remote unit capable of handling a high-frequency region without being made complicated, and a control method for the same. A wireless access system according to the present invention is provided with: a center unit (1); and a remote unit (3) that converts a baseband signal generated by the center unit (1) into a high-frequency signal and emits the high-frequency signal from an antenna (12). The center unit (1) includes a 1-bit modulator (5) that converts the baseband signal into a 1-bit signal on the basis of a generated clock signal and outputs the 1-bit signal.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: November 27, 2018
    Assignee: NEC CORPORATION
    Inventors: Shinichi Hori, Tomoyuki Yamase
  • Patent number: 10132462
    Abstract: The invention relates to an optical structure (100) for a motor vehicle headlight lighting device (1) that is set up to emit light forming a specified light pattern (LP1), wherein the optical structure (100) of the lighting device (1) is associated with the lighting device (1), or is part of it in such a way, that the optical structure (100) is transilluminated by essentially the entire luminous flux of the lighting device (1), and wherein the optical structure (100) consists of a number of optical structural elements (110) that have a light-scattering effect and that are designed in such a way that the unmodified light pattern (LP1) produced by the lighting device (1) is modified by the optical structure (100) into a specifiable modified light pattern (LP2), and wherein the optical structural elements (110) have a quadrilateral base area (202), i.e., the area (202) between the vertices (201) of a quadrilateral grid (200) is completely covered by the base area of exactly one optical structural element (110).
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: November 20, 2018
    Assignee: ZKW GROUP GMBH
    Inventors: Andreas Moser, Dietmar Kieslinger, Josef Pürstinger
  • Patent number: 10134370
    Abstract: An electronic device includes a display unit configured to display a plurality images, an eye tracking sensor configured to detect a eye-focused area on the display unit, a reflective layer, a reflective control layer configured to change a regional reflectivity of the reflective layer, and a processor configured to receive the eye-focused area on the display unit from the eye tracking sensor, and determine a focus image within the eye-focused area and an unfocused image out of the eye-focused area, and cause the reflective control layer to reflect the unfocused image. In some embodiment, the processor is configured to cause the reflective control layer not to reflect the focused image.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: November 20, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ken-Hyung Park, Tae-Seon Kim, Chang-Ryong Heo, Min-Young Kim, Tae-Kyun Kim
  • Patent number: 10132997
    Abstract: An optical system includes a silicon (Si) substrate, a buried oxide (BOX) layer formed on the substrate, a silicon nitride (SiN) layer formed above the BOX layer, and a SiN waveguide formed in the SiN layer. In some embodiments, the optical system may additionally include an interposer waveguide adiabatically coupled to the SiN waveguide to form a SiN-interposer adiabatic coupler that includes at least the tapered section of the SiN waveguide, the optical system further including at least one of: a cavity formed in the Si substrate at least beneath the SiN-interposer adiabatic coupler or an oxide overlay formed between a top of a SiN core of the SiN waveguide and a bottom of the interposer waveguide. Alternatively or additionally, the optical system may additionally include a multimode Si—SiN adiabatic coupler that includes a SiN taper of a SiN waveguide and a Si taper of a Si waveguide.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: November 20, 2018
    Assignee: Finisar Corporation
    Inventors: Daniel Mahgerefteh, Bryan Park
  • Patent number: 10128632
    Abstract: The present invention relates to a driving method for an SOA integrated EA-DFB laser monolithically-integrating a DFB laser portion, an EA modulator portion and an SOA portion, on a same substrate, wherein an electric current ISOA is injected into the SOA portion within a range of a power consumption not exceeding a total amount of a power consumption eliminated in the DFB laser portion of the SOA integrated EA-DFB laser and a power consumption eliminated in the EA modulator portion of the SOA integrated EA-DFB laser by eliminating an elimination amount ?IDFB from a maximum injection electric current into a DFB laser portion of an EA-DFB laser allowable in a case of mounting the EA-DFB laser on an optical transmission module.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: November 13, 2018
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Wataru Kobayashi, Toshio Ito
  • Patent number: 10103815
    Abstract: The present invention is directed to optical communication systems and methods thereof. In various embodiments, the present invention provides method for linearizing Mach Zehnder modulators by digital pre-compensation and adjusting the gain of the driver and/or the modulation index. The pre-compensation can be implemented as a digital pre-compensation algorithm, which is a part of an adaptive feedback loop. There are other embodiments as well.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: October 16, 2018
    Assignee: INPHI CORPORATION
    Inventor: Hari Shankar
  • Patent number: 10095028
    Abstract: There are provided a first optical member that is transparent and is formed in a thin plate shape; a Fresnel-shaped portion that is formed in a concentric form on one surface of the first optical member in the thickness direction; a half mirror layer that is formed on a surface of a Fresnel-shaped portion; a second optical member that is formed of a transparent filler for filling unevenness of a surface of the half mirror layer to form a flat surface; and a third optical member that has a transparent thin plate shape protecting an outside surface of the second optical member. A refractive index of the first optical member, a refractive index of the second optical member, and a refractive index of the third optical member are equal.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: October 9, 2018
    Assignee: Yazaki Corporation
    Inventor: Junichi Matsushita
  • Patent number: 10073319
    Abstract: An optical signal transmitter produces optical signals comprising QAM modulated vector signals generated using a single external electro-optical modulator operated in conjunction with a wavelength selective switch. The transmission processing achieves adaptive photonic frequency multiplication and comprises QAM modulated signals with high order constellations such as 8-QAM, 16-QAM, 32-QAM and 64-QAM.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: September 11, 2018
    Assignee: ZTE Corporation
    Inventors: Jianjun Yu, Xinying Li
  • Patent number: 10061117
    Abstract: A display device includes a first support plate and an opposing second support plate. At least a portion of a wall on the first support plate is associated with a pixel within a pixel region. The wall has a first segment, a second segment perpendicular to the first segment, and a third segment perpendicular to the first segment and parallel to the second segment. A first spacer on the second support plate extends toward the wall. The first spacer includes a first portion contacting the wall along a length of the first segment, a second portion coupled to the first portion and contacting the second segment along a first portion of the second segment, and a third portion coupled to the first portion and contacting the third segment along a first portion of the third segment.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: August 28, 2018
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventors: Erno Hermanus Antonius Langendijk, Carmen Paula Alamar, Gerben Boon
  • Patent number: 10061176
    Abstract: An electrochromic device may be switchable between a transparent state and at least one reflective state. A lithium-containing reflective feature may form when the electrochromic device is switched from the transparent state to the reflective state. Various products and methods may involve the electrochromic device.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: August 28, 2018
    Assignees: Alliance for Sustainable Energy, LLC, e-Chromic Technologies, Inc.
    Inventors: Timothy Snow, Judith McFadden, Robert C. Tenent
  • Patent number: 10052856
    Abstract: A method of making patterned structured solid surfaces is disclosed that includes filling a structured template with backfill material to produce a structured transfer film, patternwise curing the backfill material to produce cured areas and uncured areas in the structured transfer film, and laminating the structured transfer film to a receptor substrate. The structured template is capable of being removed to form structured and unstructured backfill layers. The structured and unstructured backfill layers may then be blanket cured. The backfill layer can include at least two different materials, one of which can be an adhesion promotion layer. In some embodiments the backfill layer includes a silsesquioxane such as polyvinyl silsesquioxane. The structured transfer film is a stable intermediate that can be covered temporarily with a release liner for storage and handling.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: August 21, 2018
    Assignee: 3M Innovative Properties Company
    Inventors: Michael Benton Free, Martin B. Wolk, Terry O. Collier, Mieczyslaw H. Mazurek, Evan L. Schwartz
  • Patent number: 9995926
    Abstract: A display device includes a first support plate. A pixel region is positioned over the first support plate. The pixel region includes a pixel and an electrode layer disposed between the first support plate and the pixel region. A specular reflective layer is disposed on the electrode layer. The specular reflective layer has a first refractive index. A diffusion layer is disposed on the specular reflective layer. The diffusion layer includes a plurality of islands. Each island of the plurality of islands is separated by a distance from an adjacent island of the plurality of islands, wherein a portion of the specular reflective layer is exposed between two adjacent islands of the plurality of islands. Each island has a second refractive index greater than the first refractive index.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: June 12, 2018
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventor: Toru Sakai
  • Patent number: 9989700
    Abstract: A planar lightwave circuit may include a set of components. The set of components may include an input waveguide to couple to an optical communications transceiver. The set of components may include an output waveguide to couple to the optical communications transceiver. The set of components may include a common port to couple to an optical fiber. The set of components may include a first polarization beam splitter. The set of components may include a second polarization beam splitter. The set of components may include a third polarization beam splitter. The set of components may include a rotator assembly including a Faraday rotator and a quarter-wave plate.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: June 5, 2018
    Assignee: Lumentum Operations LLC
    Inventors: Michael Ayliffe, Zhaoming Li
  • Patent number: 9991048
    Abstract: Systems and methods for transmitting and receiving wireless power are disclosed. A transmitter may include one or more magnetic inductive coil(s) configured to transmit power, a plurality of drive loops, one or more switches connected to the plurality of drive loops, and a controller configured to connect or disconnect the drive loops using the one or more switches. A receiver may include one or more magnetic inductive coil(s) configured to receive power, a plurality of load loops, one or more switches connected to the plurality of load loops, and a controller configured to connect or disconnect the load loops using the one or more switches. The wireless power system may include inductive coils and RF antennas that are adaptively controlled and configured. A transmitter and/or a receiver may adaptively rotate, adjust orientation and/or location.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: June 5, 2018
    Assignee: The Board of Trustees of The University of Alabama
    Inventor: Jaber A. Abu Qahouq
  • Patent number: 9991953
    Abstract: A self-calibration procedure for an optical transmitter is provided. During the self-calibration procedure, a phase bias of an optical modulator of the optical transmitter is set so that an in-phase path and a quadrature path of the optical modulator are in phase. Stimulus signals are supplied to the in-phase and quadrature paths of the optical modulator, over a frequency range. Detection, with a photodetector, is made of an optical output of the optical modulator at a plurality of frequency steps over the frequency range. A photodetector converts an optical output of the optical modulator to an electrical signal. First and second measurement values are generated from the electrical signal output from the photodetector. A frequency spectrum and/or time delay is computed from the first and second measurement values for each frequency step value over the frequency range.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: June 5, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Christopher Fludger, Thomas Duthel
  • Patent number: 9983479
    Abstract: An apparatus and method for fabricating high quality one- or two-dimensional diffractive waveplates and arrays that exhibit high diffraction efficiency and capable of inexpensive large volume production. A generally non-holographic and aperiodic polarization converter for converting the polarization of a coherent input light beam of a visible wavelength into a pattern of continuous spatial modulation at the output of the polarization converter. A photoresponsive material characterized by an anisotropy axis according to polarization of the light beam is exposed to a polarization modulation pattern and coated subsequently with an anisotropic material overlayer with ability of producing an optical axis orientation according to and under the influence of the anisotropy axis of the photoresponsive material layer.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: May 29, 2018
    Assignees: Beam Engineering for Advanced Measurements Co., The United States of America as Represented by the Secretary of the Army
    Inventors: Nelson V. Tabirian, Sarik R. Nersisyan, Brian R. Kimball, Diane M. Steeves
  • Patent number: 9947359
    Abstract: A holographic characterization and playback apparatus is provided, which includes a light source, an optical path-forming optical system for separating the light emitted from the light source into a probe light and a reference light of different polarizations, and combining optical paths of the probe light and the reference light.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: April 17, 2018
    Assignee: GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Euiheon Chung, Tae Joong Eom, Canghuei Yang, Mooseok Jang, Jihee Ryu
  • Patent number: 9941970
    Abstract: The present invention is directed to optical communication systems and methods thereof. In various embodiments, the present invention provides method for linearizing Mach Zehnder modulators by digital pre-compensation and adjusting the gain of the driver and/or the modulation index. The pre-compensation can be implemented as a digital pre-compensation algorithm, which is a part of an adaptive feedback loop. There are other embodiments as well.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: April 10, 2018
    Assignee: INPHI CORPORATION
    Inventor: Hari Shankar
  • Patent number: 9933573
    Abstract: A tunable optical device uses a diffraction grating to angularly disperse a collimated beam carrying multiple wavelengths into multiple individually collimated wavelength beams, and then refocuses each of the individual collimated beams to its own focusing point on a moving plate that is located in the region of the focus plane. One or more reflective dots on the moving plate then selectively reflect particular wavelength(s) back to a first output port. The unselected wavelengths are transmitted through the moving plate, where they are then recombined and sent to a second output port. In a typical optical network architecture, the selected wavelength(s) could be viewed as the dropped traffic at a node of the optical network, while the unselected wavelengths could be viewed as the express traffic that is being passed to another node of the network. The device can also be used as a wavelength or beam combiner as well as a splitter.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: April 3, 2018
    Assignee: DICON FIBEROPTICS, INC.
    Inventors: Jeffrey Boryean Lee, Ho-Shang Lee
  • Patent number: 9933639
    Abstract: Systems, and related methods, relating generally to electro-absorption modulation are described. In a system therefor, there is a waveguide. A photodetector is configured with respect to the waveguide for detecting luminous intensity of an optical signal. An electro-absorption modulator is configured with respect to the waveguide for electro-absorption modulation of the optical signal. An integrated heating element is located alongside and spaced apart from both the photodetector and the electro-absorption modulator. the integrated heating element is configured for controllably heating the photodetector and the electro-absorption modulator.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: April 3, 2018
    Assignee: XILINX, INC.
    Inventors: Sen Lin, Kun-Yung Chang, Austin H. Lesea
  • Patent number: 9927677
    Abstract: An optical interferometer device is provided including a waveguide interferometer. The waveguide interferometer includes first and second waveguide arms in a waveguide plane, each waveguide arm including a n-type region and a p-type region forming a junction. The n-type region and the p-type region of the second waveguide arm are translationally symmetric with respect to the n-type region and the p-type region, respectively, of the first waveguide arm in the waveguide plane.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: March 27, 2018
    Assignee: Huawei Technologies Co. Ltd.
    Inventors: Dominic John Goodwill, Jia Jiang
  • Patent number: 9923638
    Abstract: Optical signaling is implemented by modulating visible light with variable pulse position modulation (VPPM). VPPM is a composite waveform and its optical signal includes a Start Frame Delimiter (SFD) which indicates start of optical signaling. To identify modulated lights, the duty cycle is periodically changed in the waveform to induce an AM envelope at a frequency higher than the response of the human eye. The signal is then sampled via a camera producing an alias frequency that produces noticeable blinking. Because the communication is asynchronous, the desired camera frame rate (fc) in relationship to the modulation bit rate timing clock (or symbol rate, fs) is only approximate. Consequently, a frequency offset develops between the camera frame rate (fc) and the symbol rate (fs) in transmission of long packets. The disclosed embodiments provide a detection algorithm, system and apparatus to provide clock offset tracking and correction.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: March 20, 2018
    Assignee: Intel Corporation
    Inventors: Javier Perez-Ramirez, Richard D. Roberts
  • Patent number: 9891726
    Abstract: A stylus includes an elongate gripping member terminating at a writing tip, a communication interface housed within the elongate gripping member, a touch-sensitive retention clip extending from the elongate gripping member, and a controller housed within the elongate gripping member. The communication interface is configured to wirelessly communicate with a computing device. The controller is configured to detect a position or movement of a finger along a length of the touch-sensitive retention clip, and send to the computing device, via the communication interface, information based on the position or movement of the finger along the length of the touch-sensitive retention clip.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: February 13, 2018
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventor: Ori Laslo
  • Patent number: 9885870
    Abstract: A waveguide configured for use with a near eye display (NED) device can include a light-transmissive substrate configured to propagate light rays through total internal reflection and a switchable diffractive optical element (DOE) on a surface of the substrate that is configured to input and/or output light rays to and/or from the substrate. According to some embodiments, the switchable DOE can include diffractive properties that vary across an area of the DOE. In some embodiments, the switchable DOE includes a surface relief diffraction grating (SRG) a surface of the substrate, a layer of liquid crystal material in contact with the SRG, a layer of conducting material in contact with the liquid crystal material configured to apply the voltage to the liquid crystal material, and a layer of insulating material over the layer of conducting material.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: February 6, 2018
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Petri Antero Stenberg, Tuomas Heikki Sakari Vallius
  • Patent number: 9876328
    Abstract: In one example, a method includes outputting, by a power supply and across a supply node and a ground node, a supply power signal; and selectively outputting, by a driver, a power signal to a second terminal of a light emitting element that has a first terminal and the second terminal, wherein the first terminal of the light emitting element is coupled to a load node, wherein a supply terminal of the driver is coupled to the supply node, wherein a ground terminal driver is coupled to the ground node, and wherein a difference between a potential of the supply node and a potential of the ground node is less than an activation voltage of the light emitting element.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: January 23, 2018
    Assignee: Infineon Technologies AG
    Inventors: Herwig Wappis, Fabrizio Cortigiani
  • Patent number: 9864255
    Abstract: A waveguide including a substrate, an assembly of semiconductor regions consecutively extending on the substrate along a direction corresponding to a propagation direction of an electromagnetic wave having a wavelength noted ?, the semiconductor regions being electrically alternately doped with a first conductivity type and with a second conductivity type along the propagation direction, a dielectric layer interposed between two consecutive semiconductor regions, at least one pair of consecutive elementary structures having a dimensions along the propagation direction adapted to ? to form a grating where the light propagates with no diffraction effects.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: January 9, 2018
    Assignees: COMMISSARIAT À L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITÉ PARIS-SUD
    Inventors: Alexis Abraham, Ségolène Olivier, Diego Perez-Galacho, Delphine Marris-Morini, Laurent Vivien
  • Patent number: 9854968
    Abstract: A system and method for eye monitoring using the natural reflections of the lenses and human eyes. The system includes a frame worn on the head of a user containing side supports and lenses. A light source and a camera are mounted on the side supports, so that they are located behind the eyes of the user, when the system is being worn by the user. The camera captures the natural light reflections from the lenses and the eye retinas, and uses the data to calculate a position or orientation of a user gaze.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: January 2, 2018
    Assignee: International Business Machines Corporation
    Inventors: Inseok Hwang, Su Liu, Eric J. Rozner, Chin Ngai Sze, Chungkuk Yoo
  • Patent number: 9857771
    Abstract: An iterative method of retrieving phase information in the Fourier domain representative of the nth frame of a sequence of 2D image frames. The method comprises using at least one parameter related to retrieval of phase information Fourier domain of the (n?1) frame as a starting point for the iterative method.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: January 2, 2018
    Assignee: Two Trees Photonics Limited
    Inventor: Jamieson Christmas
  • Patent number: 9859985
    Abstract: An optical transmitter has an electrical signal generator configured to generate an electrical drive signal based upon input data; an optical modulator configured to modulate an input light by the electrical drive signal, the optical modulator having a first waveguide pair, a second waveguide pair, and a phase shifter that provides a phase difference between light waves travelling through the first waveguide pair and the second waveguide pair; and a controller configured to set the phase difference at the phase shifter to 0+n*? radians, where it is an integer, when a modulation scheme of the optical modulator is changed from a first scheme using four or more phase values to a second scheme using two phase values.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: January 2, 2018
    Assignee: FUJITSU LIMITED
    Inventor: Yuichi Akiyama
  • Patent number: 9857587
    Abstract: The instant disclosure provides a head-up display device including an accommodating housing, a projection panel assembly, a protective cover, a transmission means, and a switching means. The transmission means includes a first transmission unit and a second transmission unit. The switching means is switched to drive the first transmission unit or the second transmission unit. Thereby, the first transmission unit is driven by the switching means to move the protective cover, or the second transmission unit is driven by the switching means to move the projection panel assembly relative to the accommodating housing.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: January 2, 2018
    Assignees: LITE-ON ELECTRONICS (GUANGZHOU) LIMITED, LITE-ON TECHNOLOGY CORPORATION
    Inventor: Hung-Chang Chien
  • Patent number: 9837859
    Abstract: A transmitter unit for wireless transmission of power by way of a bundled laser beam is described. The transmitter unit has a laser fiber bundle having a plurality of laser fibers, wherein each laser fiber is designed to emit a laser beam; positioning optics for adjusting an emission direction of the bundled laser beam; a field lens and a primary lens. The plurality of laser fibers is designed to emit a laser beam from each, passing through the positioning optics, the collimator lens and the primary lens, in this order, so that the laser beam emitted by the transmitter unit is emitted in bundled form. A particularly efficient device with an unlimited flight time and a large radius of use is achieved by the hybrid drive with solar power and laser power from the ground and temporary storage of the power in batteries.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: December 5, 2017
    Assignee: Airbus Defence and Space GmbH
    Inventors: Manfred Hiebl, Hans Wolfgang Pongratz
  • Patent number: 9837636
    Abstract: A substrate for an organic light-emitting device (OLED) with enhanced light extraction efficiency, a method of manufacturing the same and an OLED having the same, in which the light extraction efficiency is enhanced, thereby reducing the phenomenon of color shift in which color changes depending on the position of a viewer within the viewing angle. The transparent substrate used in an OLED includes an anode, an organic light-emitting layer and a cathode which are stacked on each other, the transparent substrate comprising a porous layer in at least one portion of one surface thereof that adjoins the organic light-emitting device, a refractive index of the porous layer being smaller than a refractive index of the transparent substrate.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: December 5, 2017
    Assignee: Corning Precision Materials Co., Ltd.
    Inventor: Seong-Sik Park