Patents by Inventor Won-Taek Han

Won-Taek Han 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 and planar waveguide for achieving a substantially uniform optical attenuation
    Publication number: 20020106181
    Abstract: The present invention relates to an optical fiber and a planar waveguide for achieving a uniform optical attenuation, which comprises a core co-doped with a first metal ions having an optical absorption coefficient of a negative slope in a particular wavelength band and a second metal ions having an optical absorption coefficient of a positive slope in a predetermined wavelength band.
    Type: Application
    Filed: January 30, 2002
    Publication date: August 8, 2002
    Inventors: Won-Taek Han, Jin-Haing Kim