High-precision ranging and speed measurement technology based on coherent dual-frequency laser

Yuchen Jie; Changming Zhao; Xiaotian Li; Yabi Li; Yuxiao Xing; Zilong Zhang; Haiyang Zhang

doi:10.1117/12.2651939

10 May 2023 High-precision ranging and speed measurement technology based on coherent dual-frequency laser

Yuchen Jie, Changming Zhao, Xiaotian Li, Yabi Li, Yuxiao Xing, Zilong Zhang, Haiyang Zhang

Proceedings Volume 12554, AOPC 2022: Advanced Laser Technology and Applications; 125540E (2023) https://doi.org/10.1117/12.2651939
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

A coherent dual-frequency lidar architecture for long-distance high-precision ranging and velocity measurement is proposed, using the method of optical heterodyne detection, which can avoid complex optical coherence configurations. The system uses a dual-frequency laser with a beat frequency of 200MHz as the dual-frequency light source, and performs measurement through the principles of phase ranging and Doppler velocimetry. The experimental verification shows that the operating distance of the system reaches 3200m, the distance resolution is less than 0.5m, and the speed measurement accuracy range is ±0.25m/s. The results show that the system can realize long-distance high-precision single-point ranging and speed measurement.

Citation Download Citation

Yuchen Jie, Changming Zhao, Xiaotian Li, Yabi Li, Yuxiao Xing, Zilong Zhang, and Haiyang Zhang "High-precision ranging and speed measurement technology based on coherent dual-frequency laser", Proc. SPIE 12554, AOPC 2022: Advanced Laser Technology and Applications, 125540E (10 May 2023); https://doi.org/10.1117/12.2651939

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