关键词: 绝对距离测量/
啁啾脉冲干涉/
光频梳
English Abstract
Absolute distance ranging by means of chirped pulse interferometry
Liu Ting-Yang1,Zhang Fu-Min1,
Wu Han-Zhong1,
Li Jian-Shuang2,
Shi Yong-Qiang3,
Qu Xing-Hua1
1.State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China;
2.National Institute of Metrology, Beijing 100013, China;
3.Beijing Institute of Control and Engineering, Beijing 100190, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant Nos. 51327006, 51105274), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20120032130002), and the China Aerospace Science and Technology CAST innovation fund.Received Date:24 July 2015
Accepted Date:18 October 2015
Published Online:20 January 2016
Abstract:Large-range and high-accuracy absolute distance measurement plays an important role in many practical applications, such as industrial production, aerospace and scientific research, etc. In this paper, a method is proposed for absolute distance measurement by chirped pulse interferometry based on the femtosecond optical frequency comb. The interference spectra obtained in experiments are analyzed by means of the principle of the dispersive interference, and the distance can be determined by the shift of the widest fringe in the interference spectra. An absolute distance measurement system can be set up based on the modified Michelson interferometer with a pair of gratings to chirp the reference pulses in the reference arm. Experimental results are in agreement well within 33 m in a range up to 65 m, i.e. a relative precision of 5.110-7. In addition, the optimization of the measurement uncertainty is theoretically and experimentally performed.
Keywords: absolute distance measurement/
chirped pulse interferometry/
optical frequency comb
