Patents by Inventor Thomas L. Koch

Thomas L. Koch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200379175
    Abstract: In accordance with a method of forming a waveguide in a polymer film disposed on a substrate, a plurality of regions on a polymer film are selectively exposed to a first dosage of radiation. The polymer film is formed from a material having a refractive index that decreases by exposure to the radiation and subsequent heating. At least one region of the polymer film that was not previously exposed to the radiation is selectively exposing to a second dosage of radiation. The second dosage of radiation is less than the first dosage of radiation. The polymer film is heated to complete curing of the polymer film.
    Type: Application
    Filed: August 20, 2018
    Publication date: December 3, 2020
    Applicant: Arizona Board of Regents on behalf of the University of Arizona
    Inventors: Linan JIANG, Stanley, K. H. PAU, Robert A. NORWOOD, Thomas L. KOCH
  • Patent number: 10667824
    Abstract: A surgical clip applier and methods for applying surgical clips to a vessel, duct, shunt, etc., during a surgical procedure are provided. In one exemplary embodiment, a surgical clip applier is provided having a housing with a trigger movably coupled thereto and an elongate shaft extending therefrom with opposed jaws formed on a distal end thereof. The trigger is adapted to advance a clip to position the clip between the jaws, and to move the jaws from an open position to a closed position to crimp the clip positioned therebetween.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: June 2, 2020
    Assignee: Ethicon LLC
    Inventors: Dario Vitali, Nicholas G. Molitor, Thomas W. Huitema, Robert L. Koch, Brian D. Bertke, Kevin A. Larson, Richard P. Fuchs, Mark A. Davison
  • Publication number: 20200132931
    Abstract: An optical arrangement includes an optical printed circuit board (OPCB) having at least a first optical waveguide having a first end located on the OPCB. The optical arrangement also includes at least one photonic integrated circuit (PIC) mounted to the OPCB. The PIC includes a second optical waveguide. The first waveguide has a second end located on a portion of the second waveguide to optically couple light between the PIC and the first waveguide. The portion of the second waveguide on which the second end of the first waveguide is located has an inverse taper. The inverse tapered portion is defined by a plurality of segments. The segments of the inverse tapered portion each have a length and a taper rate that causes each segment to make an equal contribution to any radiation losses in the mode transformation of light being coupled between the first and second waveguides.
    Type: Application
    Filed: January 30, 2018
    Publication date: April 30, 2020
    Inventors: Erfan M. FARD, Robert A. NORWOOD, Thomas L. Koch, Stanley K. Pau
  • Publication number: 20190098751
    Abstract: A flexible polymer waveguide array structure serves as a stitch or jumper on an optical printed circuit board (OPCB). The flexible polymer waveguide array structure can be attached to the OPCB so that it can provide a chip-to-OPCB optical connection. The waveguide(s) in the flexible polymer waveguide array structure may be prefabricated before the flexible polymer waveguide array structure is attached to the OPCB. Alternatively, the waveguides may be fabricated after the flexible polymer waveguide array structure has been attached to the OPCB. The waveguide(s) may be subsequently formed using a printing process such as photolithography. As a consequence of forming the waveguide(s) after attachment of the flexible polymer waveguide array to the OPCB, the precision in the lateral alignment that is required when placing the flexible polymer waveguide array structure on the OPCB is generally significantly less than is required when the waveguide(s) are prefabricated.
    Type: Application
    Filed: April 28, 2017
    Publication date: March 28, 2019
    Inventors: Thomas L. KOCH, Robert A. NORWOOD, Stanley K.H. PAU, Nasser N. PEYGHAMBARIAN
  • Publication number: 20180314151
    Abstract: A method of fabricating an optical connection to at least one planar optical waveguide integrated on a planar integrated circuit (PIC) uses a machine vision system or the like to detect one or more positions at which one or more optical connections are to be made to at least one planar optical waveguide located on the PIC. A spatial light modulator (SLM) is used as a programmable photolithographic mask through which the optical connections are written in a volume of photosensitive material using a photolithographic process. The SLM is programmed to expose the photosensitive material to an illumination pattern that defines the optical connections. The programming is based at least in part on the positions that have been detected by the vision system. The optical connections are printed by exposing the photosensitive material to illumination that is modulated by the pattern with which the SLM is programmed.
    Type: Application
    Filed: October 3, 2016
    Publication date: November 1, 2018
    Inventors: THOMAS L. KOCH, ROBERT A. NORWOOD, STANLEY K. H. PAU, Nasser N. PEYGHAMBARIAN
  • Patent number: 8619358
    Abstract: An optical amplifier on a silicon platform includes a first doped device layer and a second doped device layer. A gain medium is positioned between the first and second doped device layers. The gain medium comprises extrinsic gain materials so as to substantially confine in the gain medium a light signal and allow the optical amplifier to be electrically or optically pumped.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: December 31, 2013
    Assignees: Massachusetts Institute of Technology, California Institute of Technology, The Board of Trustees of the Leland Stanford Junior University, University of Rochester, Cornell University
    Inventors: Lionel C. Kimerling, Harry Atwater, Mark L. Brongersma, Luca Dal Negro, Thomas L Koch, Philippe Fauchet, Michal Lipson, Jurgen Michel, Carlos Angulo Barrios
  • Publication number: 20100303414
    Abstract: An optical device includes an optically emitting material producing spontaneous emission and an optical waveguide coupled to the optically emitting material. The spontaneous emission from the optically emitting material is emitted into at least one optical mode of the optical waveguide. The optical waveguide coupled to the optically emitting material does not provide optical gain, and the presence of the optical waveguide causes the spontaneous emission rate to be substantially more rapid than in the absence of the optical waveguide. The optical waveguide causes the more rapid spontaneous emission rate over a broad range of frequencies.
    Type: Application
    Filed: April 20, 2010
    Publication date: December 2, 2010
    Inventors: Harry A. Atwater, JR., Ryan M. Briggs, Mark L. Brongersma, Young Chul Jun, Thomas L. Koch, Ravi Sekhar Tummidi
  • Publication number: 20100091358
    Abstract: An optical amplifier on a silicon platform includes a first doped device layer and a second doped device layer. A gain medium is positioned between the first and second doped device layers. The gain medium comprises extrinsic gain materials so as to substantially confine in the gain medium a light signal and allow the optical amplifier to be electrically or optically pumped.
    Type: Application
    Filed: November 3, 2009
    Publication date: April 15, 2010
    Inventors: Lionel C. Kimerling, Harry Atwater, Mark L. Brongersma, Luca Dal Negro, Thomas L. Koch, Philippe Fauchet, Michal Lipson, Jurgen Michel, Carlos Angulo Barrios
  • Patent number: 7563628
    Abstract: Disclosed is a method of fabricating an optical waveguide device including the steps of forming a mask over a waveguide core material layer so as to leave a portion of the layer exposed, and exposing the structure to an oxidizing environment to form an oxide layer on the waveguide core material layer at least in the exposed portion thereby defining the lateral dimension of the waveguide core. The resulting waveguide core has extremely smooth surfaces for low optical losses.
    Type: Grant
    Filed: November 3, 2005
    Date of Patent: July 21, 2009
    Assignee: Lehigh University
    Inventors: Thomas L. Koch, Robert M. Pafchek, Mark A. Webster
  • Publication number: 20090015906
    Abstract: An optical amplifier on a silicon platform includes a first doped device layer and a second doped device layer. A gain medium is positioned between the first and second doped device layers. The gain medium comprises extrinsic gain materials so as to substantially confine in the gain medium a light signal and allow the optical amplifier to be electrically or optically pumped.
    Type: Application
    Filed: May 18, 2007
    Publication date: January 15, 2009
    Inventors: Lionel C. Kimerling, Harry Atwater, Mark L. Brongersma, Luca Dal Negro, Thomas L. Koch, Philippe Fauchet, Michal Lipson, Jurgen Michel
  • Patent number: 6490044
    Abstract: An improved interferometric modulator permits the reduction in size of optical transmitters. In one embodiment, the optical modulator includes amplifiers or attentuators as phase modulators. In another embodiment, two outputs from a combiner are fed to the modulator, thus avoiding the requirement for an input splitter in the modulator. Light passing through the modulator may be both phase-shifted and amplified or attenuated by optical regulator sections located in the modulator. In another embodiment, the transmitter is included as a multiple-wavelength optical communications source, where individual current sources are provided to actuate a number of light sources feeding into the combiner, a processor controls the operation of each light source, and a modulator driver receives a data input signal to be encoded on the output of the source. By combining a number of modulators, a gray scale modulator may be fabricated for producing a gray scale output, rather than a conventional binary level output.
    Type: Grant
    Filed: September 17, 1998
    Date of Patent: December 3, 2002
    Assignee: JDS Uniphase Corporation
    Inventors: Thomas L. Koch, Donald R. Scifres
  • Patent number: 6392751
    Abstract: An improved interferometric modulator permits the reduction in size of optical transmitters. In one embodiment, the optical modulator includes amplifiers or attentuators as phase modulators. In another embodiment, two outputs from a combiner are fed to the modulator, thus avoiding the requirement for an input splitter in the modulator. Light passing through the modulator may be both phase-shifted and amplified or attenuated by optical regulator sections located in the modulator. In another embodiment, the transmitter is included as a multiple-wavelength optical communications source, where individual current sources are provided to actuate a number of light sources feeding into the combiner, a processor controls the operation of each light source, and a modulator driver receives a data input signal to be encoded on the output of the source. By combining a number of modulators, a gray scale modulator may be fabricated for producing a gray scale output, rather than a conventional binary level output.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: May 21, 2002
    Assignee: JDS Uniphase Corporation
    Inventors: Thomas L. Koch, Donald R. Scifres
  • Patent number: 6359915
    Abstract: A stabilized single-longitudinal-mode laser where stabilization is performed through a pair of Bragg reflector mirrors slightly displaced in wavelength to either side of the longitudinal mode selected for operation. Transmitted signals through each Bragg reflector are detected and used in an electrical servo loop to control the relative positions of the longitudinal mode selected for operation and the peak wavelengths of the two Bragg reflector mirrors.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: March 19, 2002
    Assignee: Agere Systems
    Inventors: Thomas L. Koch, Xing Pan
  • Patent number: 6301272
    Abstract: A fiber laser or fiber amplifier uses resonant pumping of the gain medium by providing a pump resonator that establishes a resonator cavity at the pump wavelength which includes the pumped gain medium. The pump resonator may be of a distributed feedback (DFB) or a distributed Bragg reflector (DBR) type construction, and may be combined with signal reflection apparatus of either DFB or DBR type construction that provides oscillation of the desired laser output wavelength. If used without a signal reflection apparatus, the invention may be operated as a resonant pumped fiber amplifier. A resonant pumped laser may use a wavelength stabilized pump source to maximize pumping efficiency, the stabilization being provided by optical feedback.
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: October 9, 2001
    Assignee: SDL, Inc.
    Inventors: Thomas L. Koch, Robert Waarts
  • Patent number: 6295304
    Abstract: A fiber laser or fiber amplifier uses resonant pumping of the gain medium by providing a pump resonator that establishes a resonator cavity at the pump wavelength which includes the pumped gain medium. The pump resonator may be of a distributed feedback (DFB) or a distributed Bragg reflector (DBR) type construction, and may be combined with signal reflection apparatus of either DFB or DBR type construction that provides oscillation of the desired laser output wavelength. If used without a signal reflection apparatus, the invention may be operated as a resonant pumped fiber amplifier. Multiple resonators may also be pumped by a single pump source by locating each in a different branch of a multiple branch directional coupler. If the resonators are constructed to couple their outputs away from the coupler, a plurality of different laser outputs each having a different wavelength and equal output powers is provided.
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: September 25, 2001
    Assignee: SDL, Inc.
    Inventors: Thomas L. Koch, Stephen G. Grubb
  • Patent number: 6186937
    Abstract: A method and device for obtaining a desired phase of optical characteristic of a Fabry-Perot (FP) etalon using multiple optical detectors which, while passively aligned at various positions relative to an incident light beam, detect different phases of light signal emerging from the FP etalon. An FP etalon and optical detector array constructed in accordance with the present invention may be used as a frequency discriminator in an optical system where the FP etalon optical characteristic is required to have a particular phase.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: February 13, 2001
    Assignee: Lucent Technologies, Inc.
    Inventors: David A. Ackerman, Thomas L. Koch
  • Patent number: 6041070
    Abstract: A fiber laser or fiber amplifier uses resonant pumping of the gain medium by providing a pump resonator that establishes a resonator cavity at the pump wavelength which includes the pumped gain medium. The pump resonator may be of a distributed feedback (DFB) or a distributed Bragg reflector (DBR) type construction, and may be combined with signal reflection apparatus of either DFB or DBR type construction that provides oscillation of the desired laser output wavelength. If used without a signal reflection apparatus, the invention may be operated as a resonant pumped fiber amplifier. Resonant pumped lasers may be arranged in series to provide a laser apparatus with a selectable output wavelength. The different laser stages each provide resonance for a different pump wavelength, and each provide resonance for a different signal wavelength.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: March 21, 2000
    Assignee: SDL, Inc.
    Inventors: Thomas L. Koch, Robert Waarts
  • Patent number: 5870512
    Abstract: An improved interferometric modulator permits the reduction in size of optical transmitters. In one embodiment, the optical modulator includes amplifiers or attentuators as phase modulators. In another embodiment, two outputs from a combiner are fed to the modulator, thus avoiding the requirement for an input splitter in the modulator. Light passing through the modulator may be both phase-shifted and amplified or attenuated by optical regulator sections located in the modulator. In another embodiment, the transmitter is included as a multiple-wavelength optical communications source, where individual current sources are provided to actuate a number of light sources feeding into the combiner, a processor controls the operation of each light source, and a modulator driver receives a data input signal to be encoded on the output of the source. By combining a number of modulators, a gray scale modulator may be fabricated for producing a gray scale output, rather than a conventional binary level output.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: February 9, 1999
    Assignee: SDL, Inc.
    Inventors: Thomas L. Koch, Donald R. Scifres
  • Patent number: 5870417
    Abstract: A waveguide DBR laser or waveguide DBR laser array may be comprised of a semiconductor gain element, or a series of semiconductor gain elements, in combination with a waveguide grating functioning as a resonant cavity end reflector for lasing operation comprising either an optical fiber having a fiber grating (fiber DBR laser) or a planar waveguide (planar waveguide DBR laser). The gain element may be comprised of a laser diode which has high efficient AR coating on its front facet so that it functions as a modulated gain element in a resonant cavity established between its rear HR facet and the grating formed in the external waveguide.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: February 9, 1999
    Assignee: SDL, Inc.
    Inventors: Jean-Marc Verdiell, Robert J. Lang, Thomas L. Koch, Mehrdad Ziari
  • Patent number: 5663824
    Abstract: An apparatus and technique for providing isolation for a signal source utilizing two or more modulators is described. In particular, the apparatus generates a timed sequence of "open gates" that are synchronized to the data signal which permit transmission in a forward direction, and which attenuate a reverse direction signal. Another embodiment attenuates primarily reflected light signals by utilizing a passive waveguide and a modulator. The passive waveguide provides a propagation delay such that signals reflected from its end facet are attenuated by the modulator. The apparatus is suitable for use as an isolator for a light source in a high-speed optical fiber data transmission system.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: September 2, 1997
    Assignee: Lucent Technologies Inc.
    Inventors: Thomas L. Koch, Fumio Koyama, Kang-Yih Liou