Patents by Inventor Gou ENDO

Gou ENDO 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 coupler and optical coupling method of optical fiber with GRIN lens
    Patent number: 9904017
    Abstract: In an optical coupler in which optical fibers with GRIN lenses, each having an optical fiber and a GRIN lens joined coaxially, are disposed to face each other coaxially, with a preset inter-lens distance WD being provided, and to couple transmission light of one of the optical fibers with GRIN lenses to the other one of the optical fibers with GRIN lens, an intermediate position of the inter-lens distance WD is set to match a beam waist position of light with a shortest wavelength ?m out of the transmission light, and a lens length z along an optical axis direction of the GRIN lens is set in accordance with a bottom of a coupling loss due to a distance-shift D of a beam waist position of light with a wavelength ?i different from the ?m out of the transmission light.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: February 27, 2018
    Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Taro Suzuki, Naofumi Maruyama, Gou Endo
  • OPTICAL COUPLER AND OPTICAL COUPLING METHOD OF OPTICAL FIBER WITH GRIN LENS
    Publication number: 20170329088
    Abstract: In an optical coupler in which optical fibers with GRIN lenses, each having an optical fiber and a GRIN lens joined coaxially, are disposed to face each other coaxially, with a preset inter-lens distance WD being provided, and to couple transmission light of one of the optical fibers with GRIN lenses to the other one of the optical fibers with GRIN lens, an intermediate position of the inter-lens distance WD is set to match a beam waist position of light with a shortest wavelength ?m out of the transmission light, and a lens length z along an optical axis direction of the GRIN lens is set in accordance with a bottom of a coupling loss due to a distance-shift D of a beam waist position of light with a wavelength ?i different from the ?m out of the transmission light.
    Type: Application
    Filed: November 25, 2015
    Publication date: November 16, 2017
    Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Taro SUZUKI, Naofumi MARUYAMA, Gou ENDO