Patents by Inventor Jun-Heang Lee

Jun-Heang Lee 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).

  • Apparatus for monitoring polarization-mode dispersion and chromatic dispersion and transmitting means for transmitting optical signal in optical network
    Patent number: 7054553
    Abstract: An apparatus for monitoring polarization-mode dispersion and chromatic dispersion in optical networks in accordance with the present invention comprises; an optical distributor for distributing input optical signals, a first light receiver for photoelectrically converting the optical signals distributed by the distributor, a second light receiver for photoelectrically converting the optical signals to measure the average power of the optical signals distributed by the distributor, a filter for filtering output signals from the first light receiver, a power meter for measuring the frequency band of the optical signals filtered by the filter, an analog-to-digital (A/D) converter for converting the analog signals from the first and the second receivers into digital signals, a microprocessor for monitoring the polarization-mode dispersion and the chromatic dispersion of the optical signals by means of the digital signals from the A/D converter, and further a polarization scrambler in the optical signal sending-en
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: May 30, 2006
    Assignee: Teralink Communicaitons . Inc.
    Inventors: Yeun-Chol Chung, Keun-Ju Park, Hun Kim, Jun-Heang Lee, Chun-Ju Yun, Seung-Kyun Shin
  • Apparatus for monitoring polarization-mode dispersion and chromatic dispersion and transmitting means for transmitting optical signal in optical network
    Publication number: 20020126351
    Abstract: An apparatus for monitoring polarization-mode dispersion and chromatic dispersion in optical networks in accordance with the present invention comprises; an optical distributor for distributing input optical signals, a first light receiver for photoelectrically converting the optical signals distributed by the distributor, a second light receiver for photoelectrically converting the optical signals to measure the average power of the optical signals distributed by the distributor, a filter for filtering output signals from the first light receiver, a power meter for measuring the frequency band of the optical signals filtered by the filter, an analog-to-digital (A/D) converter for converting the analog signals from the first and the second receivers into digital signals, a microprocessor for monitoring the polarization-mode dispersion and the chromatic dispersion of the optical signals by means of the digital signals from the A/D converter, and further a polarization scrambler in the optical signal sending-en
    Type: Application
    Filed: March 6, 2002
    Publication date: September 12, 2002
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Yeun-Chol Chung, Keun-Ju Park, Hun Kim, Jun-Heang Lee, Chun-Ju Yun, Seung-Kyun Shin