Patents by Inventor Hiroshi Ishisaki

Hiroshi Ishisaki 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 fiber transmission line and optical cable including the same
    Patent number: 6421484
    Abstract: The present invention relates to an optical fiber transmission line comprising a structure for making it possible to maintain a desirable mean transmission characteristic as a whole regardless of the fluctuation in total length caused upon cutting end portions; and an optical cable including the same. The optical fiber transmission line according to the present invention comprises a main transmission line and first and second end sections connected, respectively, to both ends of the main transmission line. As a typical configuration, the main transmission line is constituted by a single-mode optical fiber and a dispersion-compensating optical fiber. At a wavelength of 1.55 &mgr;m, the single-mode optical fiber has a positive chromatic dispersion, and the dispersion-compensating optical fiber has a negative chromatic dispersion.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: July 16, 2002
    Assignees: Sumitomo Electric Industries, Ltd., OCC Corporation
    Inventors: Shigeru Tanaka, Masayuki Nishimura, Hiroshi Ishisaki
  • Optical fiber transmission line and optical cable including the same
    Publication number: 20010004415
    Abstract: The present invention relates to an optical fiber transmission line comprising a structure for making it possible to maintain a desirable mean transmission characteristic as a whole regardless of the fluctuation in total length caused upon cutting end portions; and an optical cable including the same. The optical fiber transmission line according to the present invention comprises a main transmission line and first and second end sections connected, respectively, to both ends of the main transmission line. As a typical configuration, the main transmission line is constituted by a single-mode optical fiber and a dispersion-compensating optical fiber. At a wavelength of 1.55 &mgr;m, the single-mode optical fiber has a positive chromatic dispersion, and the dispersion-compensating optical fiber has a negative chromatic dispersion.
    Type: Application
    Filed: December 15, 2000
    Publication date: June 21, 2001
    Applicant: Sumitomo Electric Industries, Ltd. and OCC Corporation
    Inventors: Shigeru Tanaka, Masayuki Nishimura, Hiroshi Ishisaki