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Proceedings Paper

An experiment of femtosecond laser absolute distance measurement by spectrally resolved interferometry
Author(s): Weihu Zhou; Yao Li; Rongyi Ji; Yan Xu; Deming Liu
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Paper Abstract

An experiment of absolute distance measurement by spectrally resolved interferometry has been executed. A Ti:Sapphire femtosecond laser without stable frequency and stable phase was used as an optical source of the measurement system. It greatly simplifies the complexity of the measurement system. A Fabry-Perot Etalon made by ourselves was employed as an optical filter to pick up frequency modes from the broad bandwidth spectrum of femtosecond laser pulse. To achieve the absolute distance, a linear array CCD detector was used to get the interferometric phase information for the calculation of distance. The measurement experiment was carried out in the non-ambiguity range and ranging precision of less than 5 μm was achieved. The result indicates that it’s feasible to measure the absolute distance by spectrally resolved interferometry with a simple femtosecond laser.

Paper Details

Date Published: 10 October 2013
PDF: 6 pages
Proc. SPIE 8916, Sixth International Symposium on Precision Mechanical Measurements, 891607 (10 October 2013); doi: 10.1117/12.2035617
Show Author Affiliations
Weihu Zhou, Academy of Opto-Electronics (China)
Yao Li, Academy of Opto-Electronics (China)
Huazhong Univ. of Science and Technology (China)
Rongyi Ji, Academy of Opto-Electronics (China)
Yan Xu, Academy of Opto-Electronics (China)
Huazhong Univ. of Science and Technology (China)
Deming Liu, Huazhong Univ. of Science and Technology (China)


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

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