Paper
18 December 2023 Direction discrimination of laser Doppler velocimetry system based on acousto-optic frequency shifter
Author Affiliations +
Abstract
In order to distinguish the direction of the moving object, a frequency-shifted laser Doppler velocimetry system was designed using acousto-optic modulation technology. Based on the heterodyne detection method, a fixed frequency is introduced by shifting the frequency of the reference beam, so that the received signal changes about the fixed frequency. In addition, the correlation detection technology is applied to signal processing in order to reduce the signal-to-noise requirements of laser Doppler velocimetry. Finally, the feasibility and speed measurement accuracy of the system are tested by using a turntable as the speed source. The experimental results show that the frequency-shifted laser velocimetry system can discriminate the velocity direction effectively.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Jiaqi Suo, Jian Zhou, and Bin Zhang "Direction discrimination of laser Doppler velocimetry system based on acousto-optic frequency shifter", Proc. SPIE 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration, 129591N (18 December 2023); https://doi.org/10.1117/12.3000605
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KEYWORDS
Laser frequency

Doppler effect

Signal detection

Signal to noise ratio

Acoustooptics

Interference (communication)

Laser Doppler velocimetry

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