Patents by Inventor Takahiro Samejima

Takahiro Samejima 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 optical element for external cavity laser
    Patent number: 7813398
    Abstract: The present invention provides a semiconductor optical element applicable to an EC-LD or an SLD, and an external cavity laser having the semiconductor optical element. The semiconductor optical element has a pair of cleavage surfaces, and comprises a semiconductor substrate 11 having a base surface and a planer structure provided on the base surface and provided with a waveguide 1G having an active layer. The waveguide 1G has an end surface with low reflectivity and another end surface with certain reflectivity.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: October 12, 2010
    Assignee: Anritsu Corporation
    Inventors: Hiroshi Mori, Atsushi Yamada, Takahiro Samejima
  • SEMICONDUCTOR OPTICAL ELEMENT AND EXTERNAL CAVITY LASER HAVING THE SEMICONDUCTOR OPTICAL ELEMENT
    Publication number: 20090225801
    Abstract: The present invention provides a semiconductor optical element applicable to an EC-LD or an SLD, and an external cavity laser having the semiconductor optical element. The semiconductor optical element has a pair of cleavage surfaces, and comprises a semiconductor substrate 11 having a base surface and a planer structure provided on the base surface and provided with a waveguide 1G having an active layer. The waveguide 1G has an end surface with low reflectivity and another end surface with certain reflectivity.
    Type: Application
    Filed: September 27, 2006
    Publication date: September 10, 2009
    Applicant: ANRITSU CORPORATION
    Inventors: Hiroshi Mori, Atsushi Yamada, Takahiro Samejima