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Proceedings Paper

Arbitrary and absolute length measurement based on time-of-flight method using femtosecond optical frequency comb
Author(s): Shujian Xing; Fumin Zhang; Shiying Cao; Xinghua Qu
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Paper Abstract

In this paper, the application of femtosecond optical frequency comb for length measurement is analyzed and developed. Based on the modified Michelson interferometer by combining with multiple pulse train interference and time-of-flight method, an arbitrary and absolute length measurement system is set up. The timing difference is calculated by the firstorder and second-order optical cross-correlation signals separately; therefore the absolute distance is obtained. An experiment of measuring a 60cm length is conducted and the results are compared with that from a high precision laser displacement sensor. Results show a good measuring linearity with the measurement precision of ±0.5μm.

Paper Details

Date Published: 10 October 2013
PDF: 6 pages
Proc. SPIE 8916, Sixth International Symposium on Precision Mechanical Measurements, 891642 (10 October 2013); doi: 10.1117/12.2035729
Show Author Affiliations
Shujian Xing, Tianjin Univ. (China)
Fumin Zhang, Tianjin Univ. (China)
Shiying Cao, National Institute of Metrology (China)
Xinghua Qu, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 8916:
Sixth International Symposium on Precision Mechanical Measurements
Shenghua Ye; Yetai Fei, Editor(s)

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