Patents by Inventor Souko Kado

Souko Kado 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).

  • Semiconductor laser module and method for simultaneously reducing relative intensity noise (RIN) and stimulated brillouin scattering (SBS)
    Patent number: 6950452
    Abstract: A semiconductor laser module including a semiconductor laser device having an integrated diffraction grating configured to output a multiple mode laser beam in the presence of a driving current, an optical fiber configured to guide the multiple mode laser beam to an output of the laser module, and an optical attenuation device configured to attenuate the multiple mode laser beam by an amount sufficient to provide a predetermined output power from the output of the laser module. The optical attenuation device may be an optical coupling lens offset from an optimum coupling position by an amount sufficient to provide the predetermined output power, or an optical attenuator interrupting the optical fiber and configured to attenuate the multiple mode laser beam by an amount sufficient to provide the predetermined output power.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: September 27, 2005
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Naoki Tsukiji, Junji Yoshida, Toshio Kimura, Souko Kado
  • Semiconductor laser module and method for simultaneously reducing relative intensity noise (RIN) ans stimulated brillouin scattering (SBS)
    Publication number: 20030067952
    Abstract: A semiconductor laser module including a semiconductor laser device having an integrated diffraction grating configured to output a multiple mode laser beam in the presence of a driving current, an optical fiber configured to guide the multiple mode laser beam to an output of the laser module, and an optical attenuation device configured to attenuate the multiple mode laser beam by an amount sufficient to provide a predetermined output power from the output of the laser module. The optical attenuation device may be an optical coupling lens offset from an optimum coupling position by an amount sufficient to provide the predetermined output power, or an optical attenuator interrupting the optical fiber and configured to attenuate the multiple mode laser beam by an amount sufficient to provide the predetermined output power.
    Type: Application
    Filed: September 23, 2002
    Publication date: April 10, 2003
    Applicant: THE FURUKAWA ELECTRIC CO., LTD.
    Inventors: Naoki Tsukiji, Junji Yoshida, Toshio Kimura, Souko Kado