Patents by Inventor Xuefei Zeng

Xuefei Zeng 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 measuring photo diodes' temperature dependence
    Patent number: 7183540
    Abstract: A system for measuring gains of a plurality of photo diodes includes a chamber adapted to host the plurality of photo diodes and a temperature control unit configured to control the temperature within the chamber to a predetermined temperature. A control unit selects at least one of the plurality of photo diodes. A hosting unit is configured to provide a bias voltage to the selected photo diode at the predetermined temperature. A light source transmits photo signals to the selected photo diode at the predetermined temperature. A measurement unit configured to measure current signals generated by the selected photo diode in response to the photo signals under the bias voltage at the predetermined temperature.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: February 27, 2007
    Assignee: Fiberxon Inc.
    Inventors: Chao Zhang, Xuefei Zeng, Zhong Yang, Yuanjun Huang, Zhiyong Jiang, Jun Cao
  • Apparatus for measuring photo diodes' temperature dependence
    Publication number: 20060208180
    Abstract: A system for measuring gains of a plurality of photo diodes includes a chamber adapted to host the plurality of photo diodes and a temperature control unit configured to control the temperature within the chamber to a predetermined temperature. A control unit selects at least one of the plurality of photo diodes. A hosting unit is configured to provide a bias voltage to the selected photo diode at the predetermined temperature. A light source transmits photo signals to the selected photo diode at the predetermined temperature. A measurement unit configured to measure current signals generated by the selected photo diode in response to the photo signals under the bias voltage at the predetermined temperature.
    Type: Application
    Filed: March 17, 2005
    Publication date: September 21, 2006
    Inventors: Chao Zhang, Xuefei Zeng, Zhong Yang, Yuanjun Huang, Zhiyong Jiang, Jun Cao