Single-photon ranging lidar based on multi-repetition-rate pulse train correlation and accumulation

Author:

Kang Yan1,Wang Xiaofang12,Zhang Tongyi12ORCID,Zhao Wei12

Affiliation:

1. Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences

2. University of Chinese Academy of Sciences

Abstract

A single-photon lidar based on multi-repetition-rate pulse train correlation and accumulation is proposed, and a ranging experiment is conducted on a 32 m target. By accumulating the correlation ranging results of pulse trains with internal spacings of 80, 100, and 125 ns, the signal-to-noise ratio of the cross correlation function is improved by about three-fold, which enables our method to improve the ranging precisions by more than 20% compared with the single repetition-rate method, and the shorter the acquisition time, the more obvious the advantage will be. Experimental results show that at an acquisition time of 0.01 s, our method can still achieve a ranging precision of 2.59 cm, while the single repetition-rate method can no longer obtain effective ranging results at this time. This method will be of great significance for realizing high-speed, large-scale unambiguous single-photon lidar ranging.

Funder

National Natural Science Foundation of China

Key Research and Development Projects of Shaanxi Province

Publisher

Optica Publishing Group

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