Fiber-optic extrinsic Fabry-Perot interferometer sensors with multi-wavelength intensity demodulation

被引：5
|
作者：
Song Ningfang [1 ]
Cui Ruiqi [1 ]
Yang Yujie [1 ]
Xu Xiaoliang
机构：
[1] BUAA, Inst Optoelect Technol, 37 XueYuan Rd, Beijing, Peoples R China
来源：
MECHANICAL ENGINEERING, MATERIALS SCIENCE AND CIVIL ENGINEERING II | 2014年 / 470卷
关键词：
Fabry-Perot cavity; strain sensor; high speed sensing; DIGITAL PHASE DEMODULATION;
D O I：
10.4028/www.scientific.net/AMM.470.630
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this paper, a novel method used for Fabry-Perot cavity length's demodulation in high-speed and large scope measurement was proposed. Principle of the method is based on uniqueness of intensity of multiple wavelengths in the scope of Fabry-Perot vibration. This technique offers flexibility of selecting incident wave length and enhances the scope of demodulation of cavity length, compared with that popular triple wave length demodulation. In experiment, multi-wavelength demodulation is demonstrated for measurement of cavity length varying from 110um to 115um and the strain resolution was higher than 0.1um.
引用
收藏
页码：630 / +
页数：2
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