Patents by Inventor Jifang QIU

Jifang QIU 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 and method for monitoring in-band OSNR
    Patent number: 9742491
    Abstract: An apparatus and a method for monitoring in-band OSNR (Optical Signal-to-Noise Ratio) which monitors the in-band OSNR by using two parallel Mach-Zehnder-interferometers with different optical time delays are disclosed. The apparatus and method can be resistant to chromatic dispersion, polarization mode dispersion and polarized noise, can measure the coherence characteristics of the signal without removing the noise, and can be manufactured into a semiconductor integrated device and be applied in the future high-speed optical network.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: August 22, 2017
    Assignee: Beijing University of Posts and Telecommunications
    Inventors: Jifang Qiu, Bo Yuan, Jian Wu, Yan Li, Xiaobin Hong, Hongxiang Guo, Jintong Lin
  • APPARATUS AND METHOD FOR MONITORING IN-BAND OSNR
    Publication number: 20150349880
    Abstract: An apparatus and a method for monitoring in-band OSNR (Optical Signal-to-Noise Ratio) which monitors the in-band OSNR by using two parallel Mach-Zehnder-interferometers with different optical time delays are disclosed. The apparatus and method can be resistant to chromatic dispersion, polarization mode dispersion and polarized noise, can measure the coherence characteristics of the signal without removing the noise, and can be manufactured into a semiconductor integrated device and be applied in the future high-speed optical network.
    Type: Application
    Filed: June 1, 2015
    Publication date: December 3, 2015
    Inventors: Jifang QIU, Bo YUAN, Jian WU, Yan LI, Xiaobin HONG, Hongxiang GUO, Jintong LIN