Patents by Inventor Shuji Kuwano

Shuji Kuwano 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 chip for arrayed waveguide grating type optical multiplexer/demultiplexer circuit, waveguide substrate, and method for fabricating optical chip for arrayed waveguide grating type optical multiplexer/demultiplexer circuit
    Patent number: 8111955
    Abstract: An optical chip according to the present invention is formed into a projecting shape expanded toward either side at the center. A waveguide substrate has a layout in which arrayed waveguide grating type optical multiplexer/demultiplexer circuits, each having a curve direction of an array waveguide reverse to each other, are arranged in combination, and the optical chips are cut out of the waveguide substrate. A method for fabricating the optical chip according to the present invention can enhance an optical chip yield rate, and further, can fabricate an optical chip having the shape for stabilizing optical characteristics of the arrayed waveguide grating type optical multiplexer/demultiplexer circuit.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: February 7, 2012
    Assignee: NTT Electronics Corporatioin
    Inventors: Shuji Kuwano, Yuji Moriya, Takamitsu Masuda
  • OPTICAL CHIP FOR ARRAYED WAVEGUIDE GRATING TYPE OPTICAL MULTIPLEXER/DEMULTIPLEXER CIRCUIT, WAVEGUIDE SUBSTRATE, AND METHOD FOR FABRICATING OPTICAL CHIP FOR ARRAYED WAVEGUIDE GRATING TYPE OPTICAL MULTIPLEXER/DEMULTIPLEXER CIRCUIT
    Publication number: 20100008626
    Abstract: An optical chip according to the present invention is formed into a projecting shape expanded toward either side at the center. A waveguide substrate has a layout in which arrayed waveguide grating type optical multiplexer/demultiplexer circuits, each having a curve direction of an array waveguide reverse to each other, are arranged in combination, and the optical chips are cut out of the waveguide substrate. A method for fabricating the optical chip according to the present invention can enhance an optical chip yield rate, and further, can fabricate an optical chip having the shape for stabilizing optical characteristics of the arrayed waveguide grating type optical multiplexer/demultiplexer circuit.
    Type: Application
    Filed: August 30, 2007
    Publication date: January 14, 2010
    Applicant: NTT ELECTRONICS CORPORATION
    Inventors: Shuji Kuwano, Yuji Moriya, Takamitsu Masuda