Acta Optica Sinica, Volume. 38, Issue 9, 0928002(2018)
An Efficient Method for Doppler Shift Measurement of Phase Modulation Laser
In order to make full use of the Doppler shift information in the phase-modulated signal, we combine the frequency-discriminating parameters in the direct current with beat components of the phase-modulated signal in sequence to construct a new frequency-discriminating parameter. It is proved theoretically and experimentally that the new frequency-discriminating parameter inherits the characteristics and advantages of amplitude-Doppler shift measurement of phase-modulated beating frequency signal. In comparison, the dynamic range is increased by about one times and the measuring accuracy is improved approximately by six times. In order to make use of the idle optical power of the echo signal, we propose a new dual-edge phase Doppler shift measurement method based on the new frequency-discriminating parameter. It is proved theoretically that the proposed method can double the measurement sensitivity.
Get Citation
Copy Citation Text
Jun Du, Na Yang, Yunhong Ding, Yongqiang Bai, Yanchen Qu, Weijiang Zhao. An Efficient Method for Doppler Shift Measurement of Phase Modulation Laser[J]. Acta Optica Sinica, 2018, 38(9): 0928002
Category: Remote Sensing and Sensors
Received: Jan. 16, 2018
Accepted: Apr. 11, 2018
Published Online: May. 9, 2019
The Author Email: