Open AccessLong distance measurement by dynamic optical frequency comb
Author(s) -
Xinyang Xu,
Ziqiang Zhang,
Haoyun Zhang,
Haihan Zhao,
Wenze Xia,
Ming-Ming He,
Jianshuang Li,
Jingsheng Zhai,
Hanzhong Wu
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.381504
Subject(s) - optics , beat (acoustics) , frequency comb , range (aeronautics) , distance measurement , repetition (rhetorical device) , phase (matter) , computer science , physics , materials science , laser , linguistics , philosophy , quantum mechanics , artificial intelligence , composite material
In this paper, we propose a method aiming to measure the absolute distance via the slope of the inter-mode beat phase by sweeping the repetition frequency of the frequency comb. The presented approach breaks the inertial thinking of the extremely stable comb spacing, and the bulky phase-locking circuit of the repetition frequency is not required. In particular, the non-ambiguity range can be expanded to be infinite. To verify the performance of presented method, a series of distance experiments have been devised in different scenarios. Compared with the reference values, the experimental results show the differences within 25 µm at 65 m range in the laboratory, and within 100 µm at 219 m range out of the lab.