Patents by Inventor Jacky Chak-Kee Chan

Jacky Chak-Kee Chan 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: 11630368
    Abstract: Devices, methods and systems for generating wideband, high-fidelity arbitrary radio frequency (RF) passband signals are described. A voltage tunable optical filter for arbitrary RF passband signal generation includes a first input configured to receive a broadband optical pulse train, a second input configured to receive a first control voltage representative of an amplitude signal, an electrooptic modulator to receive the broadband optical pulse train and the first control voltage, to modulate the broadband optical pulse train in accordance with the amplitude signal, and to produce two complementary optical outputs that form two arms of an interferometer, an optical delay component to impart an optical path difference into one of the complementary outputs of the electrooptic modulator, and a combiner or a splitter to receive two complementary optical outputs of the electrooptic modulator after impartation of the optical path difference and to produce an output interference pattern of fringes.
    Type: Grant
    Filed: December 10, 2021
    Date of Patent: April 18, 2023
    Assignee: LAWRENCE LIVERMORE NATIONAL SECURITY, LLC
    Inventors: Apurva Shantharaj Gowda, Jacky Chak-Kee Chan, Peter Thomas Setsuda DeVore, David Simon Perlmutter, Jason Thomas Chou
  • Publication number: 20220100047
    Abstract: Devices, methods and systems for generating wideband, high-fidelity arbitrary radio frequency (RF) passband signals are described. A voltage tunable optical filter for arbitrary RF passband signal generation includes a first input configured to receive a broadband optical pulse train, a second input configured to receive a first control voltage representative of an amplitude signal, an electrooptic modulator to receive the broadband optical pulse train and the first control voltage, to modulate the broadband optical pulse train in accordance with the amplitude signal, and to produce two complementary optical outputs that form two arms of an interferometer, an optical delay component to impart an optical path difference into one of the complementary outputs of the electrooptic modulator, and a combiner or a splitter to receive two complementary optical outputs of the electrooptic modulator after impartation of the optical path difference and to produce an output interference pattern of fringes.
    Type: Application
    Filed: December 10, 2021
    Publication date: March 31, 2022
    Inventors: Apurva Shantharaj Gowda, Jacky Chak-Kee Chan, Peter Thomas Setsuda DeVore, David Simon Perlmutter, Jason Thomas Chou
  • Patent number: 11209714
    Abstract: Devices, methods and systems for generating wideband, high-fidelity arbitrary radio frequency (RF) passband signals are described. A voltage tunable optical filter for arbitrary RF passband signal generation includes a first input configured to receive a broadband optical pulse train, a second input configured to receive a first control voltage representative of an amplitude signal, an electrooptic modulator to receive the broadband optical pulse train and the first control voltage, to modulate the broadband optical pulse train in accordance with the amplitude signal, and to produce two complementary optical outputs that form two arms of an interferometer, an optical delay component to impart an optical path difference into one of the complementary outputs of the electrooptic modulator, and a combiner or a splitter to receive two complementary optical outputs of the electrooptic modulator after impartation of the optical path difference and to produce an output interference pattern of fringes.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: December 28, 2021
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Apurva Shantharaj Gowda, Jacky Chak-Kee Chan, Peter Thomas Setsuda DeVore, David Simon Perlmutter, Jason Thomas Chou
  • Publication number: 20210018814
    Abstract: Devices, methods and systems for generating wideband, high-fidelity arbitrary radio frequency (RF) passband signals are described. A voltage tunable optical filter for arbitrary RF passband signal generation includes a first input configured to receive a broadband optical pulse train, a second input configured to receive a first control voltage representative of an amplitude signal, an electrooptic modulator to receive the broadband optical pulse train and the first control voltage, to modulate the broadband optical pulse train in accordance with the amplitude signal, and to produce two complementary optical outputs that form two arms of an interferometer, an optical delay component to impart an optical path difference into one of the complementary outputs of the electrooptic modulator, and a combiner or a splitter to receive two complementary optical outputs of the electrooptic modulator after impartation of the optical path difference and to produce an output interference pattern of fringes.
    Type: Application
    Filed: January 24, 2020
    Publication date: January 21, 2021
    Inventors: Apurva Shantharaj Gowda, Jacky Chak-Kee Chan, Peter Thomas Setsuda DeVore, David Simon Perlmutter, Jason Thomas Chou