Jia Linhua, Wang Yang, Wang Xinyu, Zhang Fumin, Wang Weiqiang, Wang Jindong, Zheng Jihui, Chen Jiawei, Song Mingyu, Ma Xin, Yuan Meiyan, Little Brent, Chu Sai Tek, Cheng Dong, Qu Xinghua, Zhao Wei, Zhang Wenfu
Opt Lett. 2021 Mar 1;46(5):1025-1028. doi: 10.1364/OL.415524.
Traditional frequency modulated continuous wave (FMCW) LIDAR ranging is based on heterodyne detection, calculating unknown distance by extracting the frequency of the interference signal, while the main error source is frequency modulation (FM) nonlinearity. In this paper, a ranging system based on a microresonator soliton comb is demonstrated to correct the nonlinearity by sampling the ranging signals at equal frequency intervals, producing a ranging error lower than 20 µm, while at the range of 2 m. Advantages of fast data acquisition, light computation requirements, and a simple optical path, without long optical fiber, give this method a high practical value in precision manufacturing.
传统的调频连续波（FMCW）激光雷达测距基于外差检测，通过提取干涉信号的频率来计算未知距离，而主要误差源是调频（FM）非线性。本文展示了一种基于微谐振器孤子梳的测距系统，该系统通过以相等频率间隔对测距信号进行采样来校正非线性，在2米的距离范围内产生低于20微米的测距误差。快速数据采集、低计算要求以及简单光路（无需长光纤）等优点，使得该方法在精密制造中具有很高的实用价值。
