Patents by Inventor Pi-Gang Luan

Pi-Gang Luan 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).

  • Beamsplitter utilizing a periodic dielectric structure
    Patent number: 6879432
    Abstract: An optical device having a photonic crystal structure is provided. The photonic crystal structure includes a plurality of rods/holes, a plurality of light input ports, a plurality of light output ports, a light path; and a defect of rod/hole located in the light path. The photonic crystal structure of the optical device can be optimized to adjust the powers of the lights of the output ports, and thus the output powers having identical intensities can also be achieved. When a plurality of lights is launched via the input ports, the powers and the phases of the lights of the output ports can also be optimized.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: April 12, 2005
    Assignee: National Central University
    Inventors: Chii-Chang Chen, Hung-Ta Chien, Pi-Gang Luan