Mitigation of the impact of Doppler-frequency-shift in a coherent random modulation LiDAR via phase-coded subcarrier modulation

Fengxi Yu; Bowen Qiu; Yawei Zhang; Zhongyang Xu; Shilong Pan

doi:10.1117/12.2602001

9 October 2021 Mitigation of the impact of Doppler-frequency-shift in a coherent random modulation LiDAR via phase-coded subcarrier modulation

Fengxi Yu, Bowen Qiu, Yawei Zhang, Zhongyang Xu, Shilong Pan

Author Affiliations +

Proceedings Volume 11899, Optical Metrology and Inspection for Industrial Applications VIII; 118990O (2021) https://doi.org/10.1117/12.2602001
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

A coherent random modulation LiDAR based on phase-coded subcarrier modulation is proposed to mitigate the impact of Doppler-frequency-shift (DFS) from the pseudo-random (PR) pattern. DFS is firstly obtained from the beat signal of the reflected optical carrier and the local optical signal. Then digital DFS compensation is used to mitigate the impact of the DFS from the PR-coded subcarrier. In the demonstration experiment, a 1.25-GHz RF signal is used as the subcarrier which is phase-coded with a 500-Mbit/s M-sequence. The DFS is simulated by an acousto-optic modulator (AOM). The length of fiber is measured, which demonstrate the feasibility of the proposed DFS mitigation method.

Conference Presentation

Citation Download Citation

Fengxi Yu, Bowen Qiu, Yawei Zhang, Zhongyang Xu, and Shilong Pan "Mitigation of the impact of Doppler-frequency-shift in a coherent random modulation LiDAR via phase-coded subcarrier modulation", Proc. SPIE 11899, Optical Metrology and Inspection for Industrial Applications VIII, 118990O (9 October 2021); https://doi.org/10.1117/12.2602001

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