A Brillouin optical time domain analysis based distributed fiber optic intrusion sensor system

被引：2
|
作者：
Hong X. [1 ]
Guo H. [1 ]
Wu J. [1 ]
机构：
[1] Key Laboratory of Information Photonics and Optical Communications, Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2010年 / 37卷 / 04期
关键词：
Brillouin optical time domain analysis; Distributed fiber optic sensor; Fiber optics; Intrusion detection; Strain detection;
D O I：
10.3788/CJL20103704.1037
中图分类号：
学科分类号：
摘要：
A distributed fiber optic intrusion sensor system based on Brillouin optical time domain analysis(BOTDA) is proposed. The absolute values of temperature and strain are not required in this system. So the complicated frequency analyzer is omitted, which simplifies the BOTDA system. An optical pulsed signal is used as pump and a continuous wave optical signal in counter propagating direction is used as the detected light. It is concluded that the best sensitivity can be achieved when the frequency of continuous wave is higher than the Brillouin peak gain frequency produced by pump and there exists an optimal frequency offset that makes the highest sensitivity. When the temperature of the optical fiber changes, the optimal sensitivity can be achieved by adjusting the pump frequency.
引用
收藏
页码：1037 / 1041
页数：4
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