Patents by Inventor Yijie DU

Yijie DU 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).

  • Frequency modulation demodulator based on fiber grating sensor array
    Patent number: 11193818
    Abstract: A frequency modulation demodulator based on fiber grating sensor array comprises: a laser, radio frequency signal source, acousto-optic modulator, delay fiber pair, Mach-Zehnder modulator, optical filter, optical amplifier, optical isolator, circulator, fiber grating sensor array, photodetector and data acquisition card. By the cooperation of delay fiber pair and the fiber grating, the reflected optical pulses of the two gratings (the front grating and the back grating) are overlapped in the time domain to form interference, and thereby achieving multi-point array interference demodulation.
    Type: Grant
    Filed: August 1, 2020
    Date of Patent: December 7, 2021
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Xiaofeng Jin, Zhiwei Cheng, Jianhai Ou, Xiangdong Jin, Yijie Du, Yinfang Xie
  • FREQUENCY MODULATION DEMODULATOR BASED ON FIBER GRATING SENSOR ARRAY
    Publication number: 20210033452
    Abstract: A frequency modulation demodulator based on fiber grating sensor array comprises: a laser, radio frequency signal source, acousto-optic modulator, delay fiber pair, Mach-Zehnder modulator, optical filter, optical amplifier, optical isolator, circulator, fiber grating sensor array, photodetector and data acquisition card. By the cooperation of delay fiber pair and the fiber grating, the reflected optical pulses of the two gratings (the front grating and the back grating) are overlapped in the time domain to form interference, and thereby achieving multi-point array interference demodulation.
    Type: Application
    Filed: August 1, 2020
    Publication date: February 4, 2021
    Inventors: Xiaofeng JIN, Zhiwei CHENG, Jianhai OU, Xiangdong JIN, Yijie DU, Yinfang XIE