Patents by Inventor Qi Jie Wang

Qi Jie Wang 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).

  • Patent number: 7343095
    Abstract: An optical interleaver comprising a first optical 3×3 coupler for receiving a broadband optical signal at one input port thereof, a second 3×3 optical coupler, three differential delay lines connected in parallel port-to-port between output ports of the first optical 3×3 coupler and input ports of the second optical 3×3 coupler, an infinite impulse response (IIR) element disposed in each of two of the delay lines, and wherein optical signals travelling in the respective delay lines interfere at the second 3×3 coupler to produce three frequency shifted transmission channel output signals at respective output ports of the second 3×3 coupler.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: March 11, 2008
    Assignee: Agency for Science, Technology and Research
    Inventors: Ying Zhang, Qi Jie Wang, Yeng Chai Soh
  • Patent number: 7218808
    Abstract: An optical equalizer circuit for a light source, the optical equalizer circuit comprising M optical couplers linked by differential delay lines, wherein coupling ratios for the respective M optical couplers of the equalizer circuit are calculated based on an input signal from the light source and a designed profile the optical input is to be equalized to.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: May 15, 2007
    Assignee: Agency for Science, Technology and Research
    Inventors: Ying Zhang, Qi Jie Wang, Yeng Chai Soh