Patents by Inventor Han Zhengfu

Han Zhengfu 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).

  • Polarization-Controlled Encoding Method, Encoder, And Quantum Key Distribution System
    Publication number: 20080037998
    Abstract: The invention relates to a polarization-controlled encoding method, encoder and quantum key distribution system, which is characterized in that polarization maintaining light path or 90 degree rotation Faraday mirror are used inside the encoder to keep the polarization of the output pulses same, and that in the quantum key distribution system employing the polarization-controlled encoder the pulse emitted from transmitter is unidirectional-transmitted to receiver and then quantum key distribution is implemented using interference in the pulses according to the quantum key distribution protocol. The quantum key distribution system using the polarization-controlled encoder of the invention has the ability of avoiding the wiretapping to transmitter, receiver and quantum channel.
    Type: Application
    Filed: August 19, 2004
    Publication date: February 14, 2008
    Applicant: University of Science and Technology of China
    Inventors: Han Zhengfu, Bing Zhu, Xiaofan Mo, Guangcan Guo