Patents by Inventor Katsuhiko Iwashita

Katsuhiko Iwashita 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).

  • Patent number: 6741776
    Abstract: An optical waveguide module is provided, which comprises an optical waveguide component having an auxiliary connection member connected to an end of an optical waveguide chip and at least one array member for attaching an end of at least one optical fiber to a connection member to be connected to the auxiliary connection member. The optical waveguide component and the array member are connected to each other via the auxiliary connection member and the connection member. A presser member is disposed to press at least one of the optical waveguide chip and the optical fiber in the direction of the connection. An optical waveguide exposed from the end of the optical waveguide chip is in direct contact with the core of the optical fiber exposed from an end of the array member.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: May 25, 2004
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Katsuhiko Iwashita, Tomohiro Watanabe, Toshihiko Ota
  • Publication number: 20010055446
    Abstract: An optical waveguide module is provided, which comprises an optical waveguide component having an auxiliary connection member connected to an end of an optical waveguide chip and at least one array member for attaching an end of at least one optical fiber to a connection member to be connected to the auxiliary connection member. The optical waveguide component and the array member are connected to each other via the auxiliary connection member and the connection member. A presser member is disposed to press at least one of the optical waveguide chip and the optical fiber in the direction of the connection. An optical waveguide exposed from the end of the optical waveguide chip is in direct contact with the core of the optical fiber exposed from an end of the array member.
    Type: Application
    Filed: June 20, 2001
    Publication date: December 27, 2001
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Katsuhiko Iwashita, Tomohiro Watanabe, Toshihiko Ota
  • Patent number: 6320695
    Abstract: A plurality of pumping light sources (1) which generate pumping light having wavelengths different from each other are connected to respective input ports of an optical multiplexer via optical reflectors (3). The respective pumping light is stabilized by optical reflectors with respect to the oscillating wavelengths, and is multiplexed by an optical multiplexer (4). The multiplexed pumping light is multiplexed to signal light passing through an optical fiber (6) for amplification.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: November 20, 2001
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Kanji Tanaka, Katsuhiko Iwashita, Shoichi Ozawa
  • Patent number: 6257769
    Abstract: An optical waveguide component includes an optical waveguide chip formed with an optical waveguide, first and second connecting end members mounted on opposite end portions of the waveguide chip, housings for protecting the waveguide chip, and first and second receptacles mounted to end faces of the housings. When optical connector plugs are inserted into connector-plug accommodation holes of the first and second receptacles, the connector plugs are adequately positioned in the connector-plug accommodation holes by means of a guiding function of these holes, so that guide pins projecting from tip end faces of the connecting end members are fitted into guide-pin accommodation holes formed in the connector plugs, whereby optical fibers held by the connector plugs and the waveguide of the waveguide component are connected accurately and easily.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: July 10, 2001
    Assignees: The Furukawa Electric Co., Ltd., Nippon Telegraph and Telephone Corporation
    Inventors: Tomohiro Watanabe, Katsuhiko Iwashita, Toshihiko Ota, Kazunori Watanabe, Masaaki Takaya, Shinji Nagasawa