Patents by Inventor Atsuko Fukusima

Atsuko Fukusima 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).

  • Wave guide type optical device and method of fabricating the same
    Patent number: 4906063
    Abstract: This invention relates to a wave guide type optical device as an integrated optical device having formed thereon lens and grating having particularly high efficiency and a fabrication method thereof. The present invention is characterized in that a wave guide type optical device having high efficiency and high stability can be fabricated efficiently by forming a buffer layer made of a dielectric substance on a optical wave guide formed near the surface of a substrate having an acousto-optic effect, then forming a light wave control loading layer and finely working the loading layer and the buffer layer to a predetermined shape of a desired optical device.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: March 6, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Hidemi Sato, Yasuo Hira, Shigeru Sasaki, Atsuko Fukusima, Kazumi Kawamoto