Patents by Inventor Douglas M. Gill

Douglas M. Gill 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).

  • Patent number: 10203525
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: February 12, 2019
    Assignee: International Business Machines Corporation
    Inventors: Douglas M. Gill, Chi Xiong
  • Patent number: 10197819
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: February 5, 2019
    Assignee: International Business Machines Corporation
    Inventors: Douglas M. Gill, Chi Xiong
  • Patent number: 10088697
    Abstract: A dual-use thermal and electro-optic modulator. A thermal adjustment hardware set and an electric-field adjustment hardware set adjust the thermal and electrostatic properties of a common waveguide area. The hardware sets are electrically coupled. Signals for each type of modulation are conducted to the waveguide through a shared portion of a communication medium.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: October 2, 2018
    Assignee: International Business Machines Corporation
    Inventors: Douglas M. Gill, Jonathan E. Proesel, Jessie C. Rosenberg
  • Publication number: 20180143462
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 24, 2018
    Inventors: Douglas M. Gill, Chi Xiong
  • Patent number: 9946099
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: April 17, 2018
    Assignee: International Business Machines Corporation
    Inventors: Douglas M. Gill, Chi Xiong
  • Publication number: 20170255031
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Application
    Filed: May 18, 2017
    Publication date: September 7, 2017
    Inventors: Douglas M. Gill, Chi Xiong
  • Publication number: 20170248805
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Application
    Filed: May 16, 2017
    Publication date: August 31, 2017
    Inventors: Douglas M. Gill, Chi Xiong
  • Patent number: 9720300
    Abstract: A method and apparatus for controlling operation of an electro-optic modulator is disclosed. A first intensity of light is obtained at an input to the electro-optic modulator. A second intensity of light is obtained at an output of the electro-optic modulator. A difference between the obtained first intensity and the obtained second intensity is used to control a biasing of a modulator transfer function of the electro-optic modulator to control the electro-optic modulator.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: August 1, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Douglas M. Gill, Jonathan E. Proesel
  • Patent number: 9709872
    Abstract: A method and apparatus for controlling operation of an electro-optic modulator is disclosed. A first intensity of light is obtained at an input to the electro-optic modulator. A second intensity of light is obtained at an output of the electro-optic modulator. A difference between the obtained first intensity and the obtained second intensity is used to control a biasing of a modulator transfer function of the electro-optic modulator to control the electro-optic modulator.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: July 18, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Douglas M. Gill, Jonathan E. Proesel
  • Patent number: 9684191
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: June 20, 2017
    Assignee: International Business Machines Corporation
    Inventors: Douglas M. Gill, Chi Xiong
  • Publication number: 20170131576
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Application
    Filed: November 5, 2015
    Publication date: May 11, 2017
    Inventors: Douglas M. Gill, Chi Xiong
  • Patent number: 9575339
    Abstract: A method of modulating an optical input with a radio frequency (RF) signal, an interdigitated modulator, and an electro-optical modulator including the interdigitated modulator are described. The method includes splitting the optical input to a first optical input and a second optical input, traversing a first region and a second region, respectively, with the first optical input and the second optical input, and modulating the first optical input with the RF signal in the first region. The method also includes controlling propagation speed of the RF signal in the first region, controlling RF line impedance in the first region, and controlling an optical loss of the first optical input in the first region.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: February 21, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Douglas M. Gill
  • Patent number: 9575338
    Abstract: A method of modulating an optical input with a radio frequency (RF) signal, an interdigitated modulator, and an electro-optical modulator including the interdigitated modulator are described. The method includes splitting the optical input to a first optical input and a second optical input, traversing a first region and a second region, respectively, with the first optical input and the second optical input, and modulating the first optical input with the RF signal in the first region. The method also includes controlling propagation speed of the RF signal in the first region, controlling RF line impedance in the first region, and controlling an optical loss of the first optical input in the first region.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: February 21, 2017
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventor: Douglas M. Gill
  • Publication number: 20160266416
    Abstract: A method of modulating an optical input with a radio frequency (RF) signal, an interdigitated modulator, and an electro-optical modulator including the interdigitated modulator are described. The method includes splitting the optical input to a first optical input and a second optical input, traversing a first region and a second region, respectively, with the first optical input and the second optical input, and modulating the first optical input with the RF signal in the first region. The method also includes controlling propagation speed of the RF signal in the first region, controlling RF line impedance in the first region, and controlling an optical loss of the first optical input in the first region.
    Type: Application
    Filed: June 19, 2015
    Publication date: September 15, 2016
    Inventor: Douglas M. Gill
  • Publication number: 20160266464
    Abstract: A method of modulating an optical input with a radio frequency (RF) signal, an interdigitated modulator, and an electro-optical modulator including the interdigitated modulator are described. The method includes splitting the optical input to a first optical input and a second optical input, traversing a first region and a second region, respectively, with the first optical input and the second optical input, and modulating the first optical input with the RF signal in the first region. The method also includes controlling propagation speed of the RF signal in the first region, controlling RF line impedance in the first region, and controlling an optical loss of the first optical input in the first region.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 15, 2016
    Inventor: Douglas M. Gill
  • Publication number: 20160266414
    Abstract: A dual-use thermal and electro-optic modulator. A thermal adjustment hardware set and an electric-field adjustment hardware set adjust the thermal and electrostatic properties of a common waveguide area. The hardware sets are electrically coupled. Signals for each type of modulation are conducted to the waveguide through a shared portion of a communication medium.
    Type: Application
    Filed: March 12, 2015
    Publication date: September 15, 2016
    Inventors: Douglas M. Gill, Jonathan E. Proesel, Jessie C. Rosenberg
  • Patent number: 9234854
    Abstract: A method of determining a parameter of a wafer is disclosed. Light is propagated through a waveguide disposed in the wafer. A first measurement of optical power is obtained at a first optical tap coupled to the waveguide and a second measurement of optical power is obtained at a second optical tap coupled to the waveguide using a photodetector placed at a selected location with respect to the wafer. A difference in optical power is determined between the first optical tap and the second optical tap from the first measurement and the second measurement. The parameter of the wafer is determined from the determined difference in optical power.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 12, 2016
    Assignee: International Business Machines Corporation
    Inventors: Solomon Assefa, Douglas M. Gill, Jessie C. Rosenberg
  • Publication number: 20150316796
    Abstract: A method and apparatus for controlling operation of an electro-optic modulator is disclosed. A first intensity of light is obtained at an input to the electro-optic modulator. A second intensity of light is obtained at an output of the electro-optic modulator. A difference between the obtained first intensity and the obtained second intensity is used to control a biasing of a modulator transfer function of the electro-optic modulator to control the electro-optic modulator.
    Type: Application
    Filed: March 30, 2015
    Publication date: November 5, 2015
    Inventors: Douglas M. Gill, Jonathan E. Proesel
  • Publication number: 20150318927
    Abstract: A method and apparatus for controlling operation of an electro-optic modulator is disclosed. A first intensity of light is obtained at an input to the electro-optic modulator. A second intensity of light is obtained at an output of the electro-optic modulator. A difference between the obtained first intensity and the obtained second intensity is used to control a biasing of a modulator transfer function of the electro-optic modulator to control the electro-optic modulator.
    Type: Application
    Filed: June 18, 2015
    Publication date: November 5, 2015
    Inventors: Douglas M. Gill, Jonathan E. Proesel
  • Patent number: 9170439
    Abstract: A method for controlling an electro-optic modulator device includes measuring a performance metric of the device to define a first measured performance value, and changing a state of a first tuning portion of the device to connect the first tuning portion to ground.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: October 27, 2015
    Assignee: International Business Machines Corporation
    Inventors: Douglas M. Gill, William M. Green, Alberto Valdes Garcia