Patents by Inventor Masaharu Ooe

Masaharu Ooe 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).

  • Method of forming a carbon coated optical fiber with co-current reactant flow
    Patent number: 5320659
    Abstract: A surface of an optical fiber is coated by a method for coating a surface of an optical fiber with carbon comprising steps of introducing an optical fiber in a reaction chamber in the same direction as the flow of a coating raw material comprising carbon, hydrogen and halogen atoms and depositing on the surface of the optical fiber a carbon layer formed from the raw material by chemical vapor deposition, whereby the coated optical fiber has improved initial tensile strength and absorbs less hydrogen.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: June 14, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoichi Ishiguro, Masaharu Ooe, Kohei Kobayashi, Gotaro Tanaka, Minoru Watanabe
  • Production of a hermetically coated optical fiber
    Patent number: 5235666
    Abstract: A hermetically coated optical fiber comprising a core made of glass, a cladding made of quartz glass surrounding the core the outermost layer of which glass contains fluorine, and a carbon layer surrounding the fluorine-containing glass layer, which optical fiber has good initial strength and fatigue characteristics.
    Type: Grant
    Filed: July 22, 1992
    Date of Patent: August 10, 1993
    Assignees: Sumitomo Electric Industries, Ltd., Nippon Telegraph & Telephone Corporation
    Inventors: Masaharu Ooe, Yoichi Ishiguro, Gotaro Tanaka, Nobuyuki Yoshizawa
  • Hermetically coated optical fiber
    Patent number: 5157755
    Abstract: A hermetically coated optical fiber comprising a core made of glass, a cladding made of quartz glass surrounding the core the outermost layer of which glass contains fluorine, and a carbon layer surrounding the fluorine-containing glass layer, which optical fiber has good initial strength and fatigue characteristics.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: October 20, 1992
    Assignees: Sumitomo Electric Industries, Ltd., Nippon Telegraph and Telephone Corporation
    Inventors: Masaharu Ooe, Yoichi Ishiguro, Gotaro Tanaka, Nobuyuki Yoshizawa
  • Fiber optical amplifier
    Patent number: 5125066
    Abstract: The invention relates to an optical fiber in which an optically functioning element is doped in at least the core, and the cladding is hermetically coated with carbon film and an optical fiber-type optically active device comprising: an optical fiber loop bundle constituted by a plurality of winds of an optical fiber hermetically coated with carbon and doped with an optionally functioning element; and beam introducing means for introducing a beam for pumping the optically functioning element into the optical fiber loop bundle.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: June 23, 1992
    Assignees: Sumitomo Electric Industries, Ltd., Nippon Telegraph and Telephone Corporation
    Inventors: Yoichi Ishiguro, Takashi Kogo, Masaharu Ooe, Yutaka Katsuyama
  • Method and apparatus for producing coated optical fiber
    Patent number: 5035484
    Abstract: A surface of an optical fiber is coated by a method for coating a surface of an optical fiber with carbon comprising steps of introducing an optical fiber in a reaction chamber containing a coating raw material comprising carbon, hydrogen and halogen atoms and depositing on the surface of the optical fiber a carbon layer formed from the raw material by chemical vapor deposition, whereby the coated optical fiber has improved initial tensile strength and absorbs less hydrogen.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: July 30, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoichi Ishiguro, Masaharu Ooe, Kohei Kobayashi, Gotaro Tanaka, Minoru Watanabe
  • Process for fusion-splicing hermetically coated optical fibers
    Patent number: 5018824
    Abstract: A process for fusion-splicing hermetically coated optical fibers each of which comprises an inorganic coating, an optical fiber glass and optionally an organic coating, which process comprises removing the inorganic coating, fusion-splicing the fibers and then coating a portion where the inorganic coating is removed with an inorganic material.
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: May 28, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masaharu Ooe, Yoichi Ishiguro, Gotaro Tanaka