Patents by Inventor Norihito KOSUGI

Norihito KOSUGI 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).

  • Optical semiconductor resonator, optical semiconductor device, and optical module
    Patent number: 9335483
    Abstract: In order to prevent non-uniformity in emission wavelength among different sites along an optical axis direction, provided is a resonator portion including: a waveguide which includes at least two areas where an effective refraction index varies in the optical axis direction; and diffraction gratings formed along the optical axis direction of the waveguide. The diffraction grating that is formed in one of the at least two areas of the waveguide where the effective refraction index is large has a pitch narrower than a pitch of the diffraction grating that is formed in another of the at least two areas of the waveguide where the effective refraction index is small.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: May 10, 2016
    Assignee: OCLARO JAPAN, INC.
    Inventors: Norihito Kosugi, Syunya Yamauchi, Yoriyoshi Yamaguchi
  • OPTICAL SEMICONDUCTOR RESONATOR, OPTICAL SEMICONDUCTOR DEVICE, AND OPTICAL MODULE
    Publication number: 20150071584
    Abstract: In order to prevent non-uniformity in emission wavelength among different sites along an optical axis direction, provided is a resonator portion including: a waveguide which includes at least two areas where an effective refraction index varies in the optical axis direction; and diffraction gratings formed along the optical axis direction of the waveguide. The diffraction grating that is formed in one of the at least two areas of the waveguide where the effective refraction index is large has a pitch narrower than a pitch of the diffraction grating that is formed in another of the at least two areas of the waveguide where the effective refraction index is small.
    Type: Application
    Filed: September 9, 2014
    Publication date: March 12, 2015
    Inventors: Norihito KOSUGI, Syunya YAMAUCHI, Yoriyoshi YAMAGUCHI