Patents by Inventor Kazhuhisa Kashihara

Kazhuhisa Kashihara 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).

  • Arrayed waveguide grating and method for manufacturing the same
    Patent number: 6768840
    Abstract: An arrayed waveguide grating including at least one first optical waveguide, a first slab waveguide, an arrayed waveguide, a second slab waveguide and a plurality of second optical waveguides. The arrayed waveguide is connected to the first optical waveguide via the first slab waveguide. The arrayed waveguide includes a plurality of channel waveguides each of which has a different length. The plurality of second optical waveguides are connected to the arrayed waveguide via the second slab waveguide. A number of the plurality of channel waveguides is determined such that a crosstalk is at most a predetermined value.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: July 27, 2004
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Kazutaka Nara, Kazhuhisa Kashihara