Sensitivity analysis on strain sensor based on Fabry-Perot interferometer with intensity interrogation

被引：1
|
作者：
Fan F. [1 ]
Zhao J. [1 ]
Wen X. [1 ]
Jiang B. [1 ]
机构：
[1] Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2010年 / 37卷 / 06期
关键词：
Fabry-Pérot interferometer; Fiber Bragg grating; Fiber sensor; Sensors; Strain sensitivity;
D O I：
10.3788/CJL20103706.1525
中图分类号：
学科分类号：
摘要：
Based on the principle of intensity interrogation, the sensitivity of the fiber Bragg grating Fabry-Perot interferometer (FBG-FPI) strain sensor is analyzed and the influences of the grating length, the effective refractive index change and the cavity length of FBG-FPI resonator on the maximum strain sensitivity are also discussed. The strain sensitivities of two structures which FBG-FPI fibers are affixed to the transducer by different ways are also considered. The comparison between FBG-FPI and single fiber Bragg grating as well as traditional fiber Fabry-Perot interferometer with intensity interrogation is also presented. It is shown that the minimum theoretically detectable strain of the FBG-FPI strain sensors with intensity interrogation should be on the order of 10-12. The corresponding experiments, in which a periodic strain stimulated by a piezoelectric (PZT) affixed to the FBG-FPI, show that such a FBG-FPI strain sensor can be used to detect weak alternating strain signal and it has good linear character after the non-linear correction.
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页码：1525 / 1531
页数：6
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