Patents by Inventor Masaaki TAKAOKA

Masaaki TAKAOKA 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 transmission device, laser module, failure detection method for laser module, and failure detection program for laser module
    Patent number: 8772692
    Abstract: An optical transmission device capable of being coupled to an optical fiber includes a light source configured to emit a first light toward the optical fiber; a lens configured to converge the first light to an end of the optical fiber; a light reflector configured to reflect a first reflected light as a second reflected light, a part of the first light being reflected as the first reflected light by the lens or the optical fiber; a first light receiver configured to receive the second reflected light; a detector configured to detect a failure based on a difference value between a first value corresponding to an amount of the second reflected light and a reference value being indicative of an amount of the second reflected light, the second reflected light being detected when the first light is normally emitted and is normally transmitted to and through the optical fiber.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: July 8, 2014
    Assignee: Fujitsu Limited
    Inventor: Masaaki Takaoka
  • OPTICAL TRANSMISSION DEVICE, LASER MODULE, FAILURE DETECTION METHOD FOR LASER MODULE, AND FAILURE DETECTION PROGRAM FOR LASER MODULE
    Publication number: 20110220779
    Abstract: An optical transmission device capable of being coupled to an optical fiber includes a light source configured to emit a first light toward the optical fiber; a lens configured to converge the first light to an end of the optical fiber; a light reflector configured to reflect a first reflected light as a second reflected light, a part of the first light being reflected as the first reflected light by the lens or the optical fiber; a first light receiver configured to receive the second reflected light; a detector configured to detect a failure based on a difference value between a first value corresponding to an amount of the second reflected light and a reference value being indicative of an amount of the second reflected light, the second reflected light being detected when the first light is normally emitted and is normally transmitted to and through the optical fiber.
    Type: Application
    Filed: February 25, 2011
    Publication date: September 15, 2011
    Applicant: FUJITSU LIMITED
    Inventor: Masaaki TAKAOKA