Dual Michelson interferometers for distributed vibration detection

被引：110
作者：
Hong, Xiaobin [1 ]
Wu, Jian [1 ]
Zuo, Chao [2 ]
Liu, Fangsen [1 ]
Guo, Hongxiang [1 ]
Xu, Kun [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Beijing 100876, Peoples R China
[2] Beijing Special Engn Design Inst, Beijing 100102, Peoples R China
来源：
APPLIED OPTICS | 2011年 / 50卷 / 22期
关键词：
STABILIZATION;
D O I：
10.1364/AO.50.004333
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A distributed fiber optic vibration sensor is described, in which two Michelson interferometers are used as phase detectors and two 3 x 3 couplers are deployed to demodulate the time-varying phase change caused by vibration. The two interferometers are separated by four wavelength division multiplexers. The position of the vibration is obtained by signal correlation, which can be used as a perimeter security sensor to locate the intruder. The experimental results with a 4012 m fiber sensor are discussed. (C) 2011 Optical Society of America
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收藏
页码：4333 / 4338
页数：6
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