A cross-correlation based fiber optic white-light interferometry with wavelet transform denoising

被引：21
|
作者：
Wang, Zhen [1 ]
Jiang, Yi [1 ]
Ding, Wenhui [1 ]
Gao, Ran [1 ]
机构：
[1] Beijing Inst Technol, Sch Optoelect, 5 Zhongguancun South St, Beijing 100081, Peoples R China
来源：
FOURTH ASIA PACIFIC OPTICAL SENSORS CONFERENCE | 2013年 / 8924卷
关键词：
Fiber optic sensors; extrinsic Fabry-Perot interferometer; white-light interferometry; cross-correlation; discrete wavelet transforms; SENSOR;
D O I：
10.1117/12.2034087
中图分类号：
TP7 [遥感技术];
学科分类号：
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要：
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 mu m was interrogated.
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页数：4
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