Optical ranging system based on multiple pulse train interference using soliton microcomb

The multiple pulse train interference (MPTI) ranging system takes advantage of the high accuracy and absolute length measurement capability, but traditional scheme has a large measurement dead zone. In this Letter, we propose a MPTI ranging scheme based on chip-based soliton microcomb to achieve hig...

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Bibliographic Details
Published in:	Applied physics letters Vol. 118; no. 26
Main Authors:	Zheng, Jihui, Wang, Yang, Wang, Xinyu, Zhang, Fumin, Wang, Weiqiang, Ma, Xin, Wang, Jindong, Chen, Jiawei, Jia, Linhua, Song, Mingyu, Yuan, Meiyan, Little, Brent, Chu, Sai Tek, Cheng, Dong, Qu, Xinghua, Zhao, Wei, Zhang, Wenfu
Format:	Journal Article
Language:	English
Published:	Melville American Institute of Physics 28-06-2021
Subjects:	Algorithms Applied physics Cross correlation Distance measurement Interference fringes Solitary waves
Online Access:	Get full text
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Summary:	The multiple pulse train interference (MPTI) ranging system takes advantage of the high accuracy and absolute length measurement capability, but traditional scheme has a large measurement dead zone. In this Letter, we propose a MPTI ranging scheme based on chip-based soliton microcomb to achieve high-precision but no dead-zone measurement. The measurement optical path is improved to solve the problem of cross correlation interference fringe overlap, and a peak fitting algorithm is employed to further improve the measurement accuracy of the system. Using a commercial He–Ne interferometer, a 384 nm precision is obtained in 1.5 m distance measurements. Advantages of the simple optical path, high precision, and no measurement dead zone are expected to realize on-chip integration and provide a solution for precision measurement.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/5.0054065