Patents by Inventor Kazuhiko Naoe

Kazuhiko Naoe 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).

  • Semiconductor electro-absorption optical modulator integrated light emission element light emission element module and optical transmission system
    Patent number: 6678479
    Abstract: For achieving a transmission light source having different transmission properties or characteristics, i.e., the a parameters, depending upon application thereof, in a light emission element of semiconductor EA modulator integrated type being constructed with a light emission portion for lasing with a single vertical mode and a plurality of EA modulators, wherein an absorption edge wavelength under the condition of applying no bias thereto, in the semiconductor multiple-quantum-well structure owned by the modulator which is near to an emission side of the light emission portion, is to be equal or longer than the absorption edge wavelength owned by the modulator positioned far from the emission side of the light emission portion.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: January 13, 2004
    Assignee: Opnext Japan, Inc.
    Inventors: Kazuhiko Naoe, Kazuhisa Uomi, Masahiro Aoki, Minoru Fujita