Patents by Inventor Motoyuki Atoji

Motoyuki Atoji 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).

  • Method and apparatus for maintaining optical signal having low degree of polarization in specific state of polarization
    Patent number: 6393168
    Abstract: An optical circuit includes a light source having a low degree of polarization, an input section connected to the light source, and an output section connected to the input section. The input section has an optical waveguide incapable of maintaining a state of polarization. The output section has at least one optical waveguide having no branches. The optical waveguide having no branches has, in at least part thereof, an optical waveguide capable of maintaining a state of polarization.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: May 21, 2002
    Assignee: NTT Advanced Technology Corporation
    Inventors: Motoyuki Atoji, Eiichi Sugai
  • Method and apparatus for maintaining incident optical signal having low degree of polarization in specific state of polarization
    Publication number: 20020051598
    Abstract: An optical circuit includes a light source having a low degree of polarization, an input section connected to the light source, and an output section connected to the input section. The input section has an optical waveguide incapable of maintaining a state of polarization. The output section has at least one optical waveguide having no branches. The optical waveguide having no branches has, in at least part thereof, an optical waveguide capable of maintaining a state of polarization.
    Type: Application
    Filed: November 5, 2001
    Publication date: May 2, 2002
    Inventors: Motoyuki Atoji, Eiichi Sugai