Abstract
We experimentally demonstrate a method enabling absolute distance measurement based on optical sampling by cavity tuning. The cross-correlation patterns can be obtained by sweeping the repetition frequency of the frequency comb. The 114 m long fiber delay line, working as the reference arm, is actively stabilized by using a feedback servo loop with level stability. The unknown distance can be measured via the instantaneous repetition frequency corresponding to the peak of the fringe packet. We compare the present technique with the reference incremental interferometer, and the experimental results show an agreement within 3 μm over 60 m distance, corresponding to level in relative.
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
Hanzhong Wu, Fumin Zhang, Tingyang Liu, and Xinghua Qu
Appl. Opt. 55(34) 9756-9763 (2016)
Wenhui Yu, Pierre Pfeiffer, Alireza Morsali, Jianming Yang, and Joël Fontaine
Opt. Lett. 44(20) 5069-5072 (2019)
Xianyu Zhao, Xinghua Qu, Fumin Zhang, Yuhang Zhao, and Guoqing Tang
Opt. Lett. 43(4) 807-810 (2018)