Patents by Inventor Thomas Friessnegg

Thomas Friessnegg 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: 10031397
    Abstract: A method and a controller for operating an array of variable optical retarders are disclosed. Neighboring pixels of the array of variable optical retarders are driven with disordered temporal bit sequences. An optical beam illuminating the pixels tends to integrate time-domain modulation caused by individual pixels driven in a non-coordinated or disordered fashion, which reduces the overall time-domain modulation amplitude of the optical beam.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: July 24, 2018
    Assignee: Lumentum Operations LLC
    Inventors: Josh P. Kemp, Sheldon McLaughlin, Thomas Friessnegg
  • Publication number: 20170131616
    Abstract: A method and a controller for operating an array of variable optical retarders are disclosed. Neighboring pixels of the array of variable optical retarders are driven with disordered temporal bit sequences. An optical beam illuminating the pixels tends to integrate time-domain modulation caused by individual pixels driven in a non-coordinated or disordered fashion, which reduces the overall time-domain modulation amplitude of the optical beam.
    Type: Application
    Filed: January 23, 2017
    Publication date: May 11, 2017
    Inventors: Josh P. KEMP, Sheldon McLaughlin, Thomas Friessnegg
  • Patent number: 9551900
    Abstract: A method and a controller for operating an array of variable optical retarders are disclosed. Neighboring pixels of the array of variable optical retarders are driven with disordered temporal bit sequences. An optical beam illuminating the pixels tends to integrate time-domain modulation caused by individual pixels driven in a non-coordinated or disordered fashion, which reduces the overall time-domain modulation amplitude of the optical beam.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: January 24, 2017
    Assignee: Lumentum Operations LLC
    Inventors: Josh P. Kemp, Sheldon McLaughlin, Thomas Friessnegg
  • Publication number: 20150009455
    Abstract: A method and a controller for operating an array of variable optical retarders are disclosed. Neighboring pixels of the array of variable optical retarders are driven with disordered temporal bit sequences. An optical beam illuminating the pixels tends to integrate time-domain modulation caused by individual pixels driven in a non-coordinated or disordered fashion, which reduces the overall time-domain modulation amplitude of the optical beam.
    Type: Application
    Filed: July 2, 2013
    Publication date: January 8, 2015
    Inventors: Josh P. Kemp, Sheldon MCLAUGHLIN, Thomas FRIESSNEGG
  • Patent number: 7253906
    Abstract: A method for the rapid measurement of polarization dependent properties of an optical device under test uses a novel technique to generate light in four different polarization states in which each state is individually sensed at a different interference frequency. The device for executing this method includes a Mach-Zehnder interferometer (M-Z) having a reference arm and a signal arm. In the signal arm, a device called a “polarization state frequency multiplexer” (PSFM) splits the light into four ports, transforms each part into one of four predetermined polarization states and then combines the light in the different polarization states together. The combined light is then passed through the device under test and combined/interfered with the light propagating through the reference arm at the output of the M-Z interferometer.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: August 7, 2007
    Assignee: JDS Uniphase Inc.
    Inventors: Thomas Friessnegg, Yi Liang, John C. Martinho
  • Patent number: 6940588
    Abstract: A system for determining response characteristics, insertion loss and group delay, of an optical component by applying a sweeping wavelength optical signal that is modulated with an RF signal, measuring the insertion loss and group delay at a series of wavelengths and correlating the measurements to wavelengths. A method for synthesis of an effective modulation frequency in determining the group delay response characteristics of an optical component by obtaining a series of measurements over a sample optical spectrum using a given modulation frequency and calculating a weighted average of the group delays in the series of measurements giving a result substantially equivalent to a measurement taken using a modulation frequency equal to the effective modulation frequency.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: September 6, 2005
    Assignee: JDS Uniphase Inc.
    Inventors: Shane H. Woodside, Yi Liang, Thomas Friessnegg, Paul Colbourne
  • Publication number: 20040004768
    Abstract: A method for the rapid measurement of polarization dependent properties of an optical device under test uses a novel technique to generate light in four different polarization states in which each state is individually sensed at a different interference frequency.
    Type: Application
    Filed: June 23, 2003
    Publication date: January 8, 2004
    Inventors: Thomas Friessnegg, Yi Liang, John C. Martinho
  • Publication number: 20030147067
    Abstract: A system for determining response characteristics, insertion loss and group delay, of an optical component by applying a sweeping wavelength optical signal that is modulated with an RF signal, measuring the insertion loss and group delay at a series of wavelengths and correlating the measurements to wavelengths. A method for synthesis of an effective modulation frequency in determining the group delay response characteristics of an optical component by obtaining a series of measurements over a sample optical spectrum using a given modulation frequency and calculating a weighted average of the group delays in the series of measurements giving a result substantially equivalent to a measurement taken using a modulation frequency equal to the effective modulation frequency.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 7, 2003
    Inventors: Shane H. Woodside, Yi Liang, Thomas Friessnegg, Paul Colbourne