Patents Assigned to Japan as represented by the President of The University of Tokyo
  • Optical function device using photonic crystal, variable wavelength optical filter and variable wavelength light source
    Patent number: 7034978
    Abstract: A core layer contains photonic crystals formed by ferroelectric members made of a ferroelectric substance and periodically disposed along a one-dimensional direction or two-dimensional directions. Electrodes apply an electric field to the core layer. An optical function device is provided which can be made compact and can set a wavelength at high speed.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: April 25, 2006
    Assignees: Fujitsu Limited, Japan as represented by the President of The University of Tokyo
    Inventors: Tsuyoshi Aoki, Kazuaki Kurihara, Makoto Kuwabara