Patents by Inventor Duncan P. NICOL

Duncan P. NICOL 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).

  • PLC silica to silicon nitride mode transformer for hybrid devices
    Patent number: 11822123
    Abstract: Roughly described, an optical device includes a first waveguide having a first core sheathed by a first cladding, and a second waveguide having a second core. A terminal portion of second core is disposed under a terminal portion of the first core and sheathed by the first core. The refractive index of the second core is higher than that of the first core, and the index of the first core, at least in the terminal portion of the first waveguide, is higher than that of the first cladding. The second core is structured under the terminal portion of the first core so that light traveling in the second core and directed toward the end of the second core is guided along the second core and coupled into the first core, and vice-versa.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: November 21, 2023
    Assignees: BROADEX TECHNOLOGIES CO., LTD., BROADEX TECHNOLOGIES UK LIMITED
    Inventors: Hindrik Bulthuis, Duncan P. Nicol
  • PLC SILICA TO SILICON NITRIDE MODE TRANSFORMER FOR HYBRID DEVICES
    Publication number: 20210271026
    Abstract: Roughly described, an optical device includes a first waveguide having a first core sheathed by a first cladding, and a second waveguide having a second core. A terminal portion of second core is disposed under a terminal portion of the first core and sheathed by the first core. The refractive index of the second core is higher than that of the first core, and the index of the first core, at least in the terminal portion of the first waveguide, is higher than that of the first cladding. The second core is structured under the terminal portion of the first core so that light traveling in the second core and directed toward the end of the second core is guided along the second core and coupled into the first core, and vice-versa.
    Type: Application
    Filed: May 31, 2019
    Publication date: September 2, 2021
    Inventors: Hindrik BULTHUIS, Duncan P. NICOL