Patents by Inventor Charles M. JEWART

Charles M. JEWART 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).

  • Optical modulator
    Patent number: 9851615
    Abstract: An optical modulator is disclosed, in which a MMI couplers are used for input signal splitting for branching into individual Mach-Zehnder interferometers, as well as for branching and combining from individual Mach-Zehnder waveguides. MMI couplers, splitters, and combiners may be cascaded and combined with single-mode Y-splitters and combiners to provide modulators of various types, including dual polarization, quadrature phase Mach-Zehnder interferometer base optical modulators.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: December 26, 2017
    Assignee: Lumentum Operations LLC
    Inventors: Charles M. Jewart, Yannick Lize, Karl Kissa
  • OPTICAL MODULATOR
    Publication number: 20170212403
    Abstract: An optical modulator is disclosed, in which a MMI couplers are used for input signal splitting for branching into individual Mach-Zehnder interferometers, as well as for branching and combining from individual Mach-Zehnder waveguides. MMI couplers, splitters, and combiners may be cascaded and combined with single-mode Y-splitters and combiners to provide modulators of various types, including dual polarization, quadrature phase Mach-Zehnder interferometer base optical modulators.
    Type: Application
    Filed: April 10, 2017
    Publication date: July 27, 2017
    Inventors: Charles M. JEWART, Yannick LIZE, Karl KISSA
  • Optical modulator
    Patent number: 9618821
    Abstract: An optical modulator is disclosed, in which a MMI couplers are used for input signal splitting for branching into individual Mach-Zehnder interferometers, as well as for branching and combining from individual Mach-Zehnder waveguides. MMI couplers, splitters, and combiners may be cascaded and combined with single-mode Y-splitters and combiners to provide modulators of various types, including dual polarization, quadrature phase Mach-Zehnder interferometer base optical modulators.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: April 11, 2017
    Assignee: Lumentum Operations LLC
    Inventors: Charles M. Jewart, Yannick Lize, Karl Kissa
  • Optical waveguide modulator with an output MMI tap
    Patent number: 9588395
    Abstract: A planar optical waveguide circuit includes an optical modulator, such as that based on a Mach-Zehnder interferometer, that is followed by an in-line optical tap in the form of a 2×2 multi-mode interference coupler that is characterized a reduced tracking error as compared to Y-junction couplers.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: March 7, 2017
    Assignee: Lumentum Operations LLC
    Inventors: Charles M. Jewart, Karl Kissa
  • OPTICAL WAVEGUIDE MODULATOR WITH AN OUTPUT MMI TAP
    Publication number: 20160357085
    Abstract: A planar optical waveguide circuit includes an optical modulator, such as that based on a Mach-Zehnder interferometer, that is followed by an in-line optical tap in the form of a 2×2 multi-mode interference coupler that is characterized a reduced tracking error as compared to Y-junction couplers.
    Type: Application
    Filed: June 5, 2015
    Publication date: December 8, 2016
    Inventors: Charles M. JEWART, Karl Kissa
  • OPTICAL MODULATOR
    Publication number: 20160357086
    Abstract: An optical modulator is disclosed, in which a MMI couplers are used for input signal splitting for branching into individual Mach-Zehnder interferometers, as well as for branching and combining from individual Mach-Zehnder waveguides. MMI couplers, splitters, and combiners may be cascaded and combined with single-mode Y-splitters and combiners to provide modulators of various types, including dual polarization, quadrature phase Mach-Zehnder interferometer base optical modulators.
    Type: Application
    Filed: June 5, 2015
    Publication date: December 8, 2016
    Inventors: Charles M. JEWART, Yannick Lize