Patents by Inventor Yousuke Hiraki

Yousuke Hiraki 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).

  • ASE light source, optical amplifier and laser oscillator
    Patent number: 6912083
    Abstract: An ASE light source offers high outputs even in a wavelength band of 1,490 to 1,525 nm. The ASE light source outputs spontaneous emission light generated from Tm-doped optical fibers. Then, the ASE light source outputs amplified light obtained by using Er-doped optical fibers to amplify the output from the Tm-doped optical fibers and spontaneous emission light generated from the Er-doped optical fibers so that the amplified light and the spontaneous emission light are superimposed on each other.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: June 28, 2005
    Assignee: NTT Electronics Corporation
    Inventors: Yasutake Ohishi, Koichi Nakagawa, Terutoshi Kanamori, Yousuke Hiraki
  • ASE light source, optical amplifier and laser oscillator
    Publication number: 20040184820
    Abstract: An ASE light source offers high outputs even in a wavelength band of 1,490 to 1,525 nm. The ASE light source outputs spontaneous emission light generated from Tm-doped optical fibers. Then, the ASE light source outputs amplified light obtained by using Er-doped optical fibers to amplify the output from the Tm-doped optical fibers and spontaneous emission light generated from the Er-doped optical fibers so that the amplified light and the spontaneous emission light are superimposed on each other.
    Type: Application
    Filed: March 25, 2004
    Publication date: September 23, 2004
    Inventors: Yasutake Ohishi, Koichi Nakagawa, Terutoshi Kanamori, Yousuke Hiraki