Patents by Inventor Chong-Hoon Kwak

Chong-Hoon Kwak 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).

  • Wavelength division demultiplexing device, and system using it
    Patent number: 5731889
    Abstract: A wavelength division demultiplexing device, and a system using the device are disclosed, in which there is utilized a Pabry-Perot etalon using as a spacer layer a Kerr medium in which the refractive index is varied in accordance with the intensity of beams.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: March 24, 1998
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jong-Sool Jeong, Chong-Hoon Kwak, El-Hang Lee