Patents by Inventor Yasuyoshi Ote

Yasuyoshi Ote 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).

  • Ridge semiconductor laser and method for manufacturing a ridge semiconductor laser
    Patent number: 9001859
    Abstract: The ridge semiconductor laser is a semiconductor laser in which a carrier stopper layer made of an AlInAs compound, a clad layer made of an AlGaInAs compound, and an etching stopper layer made of an InGaAsP compound are stacked in sequence on one side of an active layer made of an AlGaInAs compound. The ridge semiconductor laser is provided with a ridge waveguide including, in a layer made of an InP compound, a diffraction grating made of an InGaAsP compound on the opposite side of the clad layer of the etching stopper layer.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: April 7, 2015
    Assignee: NTT Electronics Corporation
    Inventors: Atsuo Kozen, Yasuyoshi Ote, Jun-ichi Asaoka, Kenji Hirai, Hiroshi Yokoyama
  • RIDGE SEMICONDUCTOR LASER AND METHOD FOR MANUFACTURING A RIDGE SEMICONDUCTOR LASER
    Publication number: 20120314727
    Abstract: The ridge semiconductor laser is a semiconductor laser in which a carrier stopper layer made of an AlInAs compound, a clad layer made of an AlGaInAs compound, and an etching stopper layer made of an InGaAsP compound are stacked in sequence on one side of an active layer made of an AlGaInAs compound. The ridge semiconductor laser is provided with a ridge waveguide including, in a layer made of an InP compound, a diffraction grating made of an InGaAsP compound on the opposite side of the clad layer of the etching stopper layer.
    Type: Application
    Filed: January 27, 2011
    Publication date: December 13, 2012
    Inventors: Atsuo Kozen, Yasuyoshi Ote, Jun-ichi Asaoka, Kenji Hirai, Hiroshi Yokoyama