Patents by Inventor Haruyasu Komano

Haruyasu Komano 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).

  • Waveguide type variable optical attenuator
    Patent number: 7330630
    Abstract: A waveguide type variable optical attenuator is provided with a substrate for forming a waveguide for optical signal propagation; a waveguide element comprising 2 arm waveguides arranged on the surface of the substrate for constituting a portion of the waveguide and cladding for covering the arm waveguides and the surface of the substrate; and a heater arranged on the surface of the waveguide element for heating the arm waveguides. The 2 arm waveguides are connected thermally.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: February 12, 2008
    Assignee: Hitachi Cable, Inc.
    Inventors: Koutarou Tanaka, Nobuaki Kitano, Yukio Abe, Haruyasu Komano
  • Waveguide type variable optical attenuator
    Publication number: 20070065088
    Abstract: A waveguide type variable optical attenuator is provided with a substrate for forming a waveguide for optical signal propagation; a waveguide element comprising 2 arm waveguides arranged on the surface of the substrate for constituting a portion of the waveguide and cladding for covering the arm waveguides and the surface of the substrate; and a heater arranged on the surface of the waveguide element for heating the arm waveguides. The 2 arm waveguides are connected thermally.
    Type: Application
    Filed: March 14, 2006
    Publication date: March 22, 2007
    Inventors: Koutarou Tanaka, Nobuaki Kitano, Yukio Abe, Haruyasu Komano