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Proceedings Paper

A cross-correlation based fiber optic white-light interferometry with wavelet transform denoising
Author(s): Zhen Wang; Yi Jiang; Wenhui Ding; Ran Gao
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Paper Abstract

A fiber optic white-light interferometry based on cross-correlation calculation is presented. The detected white-light spectrum signal of fiber optic extrinsic Fabry-Perot interferometric (EFPI) sensor is firstly decomposed by discrete wavelet transform for denoising before interrogating the cavity length of the EFPI sensor. In measurement experiment, the cross-correlation algorithm with multiple-level calculations is performed both for achieving the high measurement resolution and for improving the efficiency of the measurement. The experimental results show that the variation range of the measurement results was 1.265 nm, and the standard deviation of the measurement results can reach 0.375 nm when an EFPI sensor with cavity length of 1500 μm was interrogated.

Paper Details

Date Published: 15 October 2013
PDF: 4 pages
Proc. SPIE 8924, Fourth Asia Pacific Optical Sensors Conference, 89241J (15 October 2013); doi: 10.1117/12.2034087
Show Author Affiliations
Zhen Wang, Beijing Institute of Technology (China)
Yi Jiang, Beijing Institute of Technology (China)
Wenhui Ding, Beijing Institute of Technology (China)
Ran Gao, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 8924:
Fourth Asia Pacific Optical Sensors Conference
Minghong Yang; Dongning Wang; Yun-Jiang Rao, Editor(s)

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