Patents by Inventor Yosuke ONAWA

Yosuke ONAWA 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).

  • Directional coupler and design method thereof, optical waveguide element and wavelength filter
    Patent number: 9588295
    Abstract: There is provided a directional coupler including a first optical waveguide core and a second optical waveguide core that are arranged in separate and parallel to each other and that propagate one of TE polarized waves and TM polarized waves of an m-th order and propagate the other of the TE polarized waves and the TM polarized waves of an n-th order. A separation distance between the first optical waveguide core and the second optical waveguide core and a width of the first optical waveguide core and the second optical waveguide core are set such that a mode coupling coefficient of a p-th mode of one of the polarized waves and a mode coupling coefficient of a q-th mode of the other polarized waves match between the first optical waveguide core and the second optical waveguide core.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: March 7, 2017
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Yosuke Onawa
  • DIRECTIONAL COUPLER AND DESIGN METHOD THEREOF, OPTICAL WAVEGUIDE ELEMENT AND WAVELENGTH FILTER
    Publication number: 20160025928
    Abstract: There is provided a directional coupler including a first optical waveguide core and a second optical waveguide core that are arranged in separate and parallel to each other and that propagate one of TE polarized waves and TM polarized waves of an m-th order and propagate the other of the TE polarized waves and the TM polarized waves of an n-th order. A separation distance between the first optical waveguide core and the second optical waveguide core and a width of the first optical waveguide core and the second optical waveguide core are set such that a mode coupling coefficient of a p-th mode of one of the polarized waves and a mode coupling coefficient of a q-th mode of the other polarized waves match between the first optical waveguide core and the second optical waveguide core.
    Type: Application
    Filed: June 17, 2015
    Publication date: January 28, 2016
    Applicant: OKI ELECTRIC INDUSTRY CO., LTD.
    Inventor: Yosuke ONAWA