Patents by Inventor Hung-Lung Chao

Hung-Lung Chao 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).

  • Optically amplified WDM/TDM hybrid polarization-insensitive fiber-optic interferometric sensor system
    Patent number: 6449046
    Abstract: A polarization-insensitive fiber-optic interferometric sensor system has an erbium-doped fiber amplifier (EDFA) at a location between a light source and a sensing array to serve as a post amplifier. An output end of the sensing array is coupled to another EDFA, and further coupled to a receiver, in which this another EDFA is used as an in-line amplifier. As the sensor system is applied for a light source with multiple wavelengths, a dense wavelength division multiplexers (DWDMs) is used to combine the multiple wavelengths into one for amplification, and another DWDM is used to decouple the multiple wavelengths.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: September 10, 2002
    Assignee: Chung-Shan Institute of Science and Technology
    Inventors: Shih-Chu Huang, Wuu-Wen Lin, Shoren-Chien Hung, Hung-Lung Chao