Patents by Inventor Tsurugi Sudoh

Tsurugi Sudoh 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 transmission device
    Patent number: 6606443
    Abstract: An optical transmission device particularly adapted to a high-speed and large-capacity optical transmission system with a large optical output and excellent reflection resistance includes a waveguide-type optical element for emerging light and an optical transmission path that is to be optically coupled to the waveguide-type optical element. The waveguide-type optical element includes, at least in part thereof, a light-emitting portion having a gain-coupled diffraction grating and a mode-converting region integrated with the light-emitting portion.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: August 12, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Sato, Masahiro Aoki, Tsurugi Sudoh, Akira Taike, Tomonobu Tsuchiya, Masaaki Komori, Kazuhisa Uomi
  • Optical transmission device
    Publication number: 20030007765
    Abstract: An optical transmission device particularly adapted to a high-speed and large-capacity optical transmission system with a large optical output and excellent reflection resistance includes a waveguide-type optical element for emerging light and an optical transmission path that is to be optically coupled to the waveguide-type optical element. The waveguide-type optical element includes, at least in part thereof, a light-emitting portion having a gain-coupled diffraction grating and a mode-converting region integrated with the light-emitting portion.
    Type: Application
    Filed: August 30, 2002
    Publication date: January 9, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Hiroshi Sato, Masahiro Aoki, Tsurugi Sudoh, Akira Taike, Tomonobu Tsuchiya, Masaaki Komori, Kazuhisa Uomi
  • Optical transmission device
    Patent number: 6459840
    Abstract: An optical transmission device particularly adapted to a high-speed and large-capacity optical transmission system with a large optical output and excellent reflection resistance includes a waveguide-type optical element for emerging light and an optical transmission path that is to be optically coupled to the waveguide-type optical element. The waveguide-type optical element includes, at least in part thereof, a light-emitting portion having a gain-coupled diffraction grating and a mode-converting region integrated with the light-emitting portion.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: October 1, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Sato, Masahiro Aoki, Tsurugi Sudoh, Akira Taike, Tomonobu Tsuchiya, Masaaki Komori, Kazuhisa Uomi