Novel Distributed Fiber Bragg Grating Sensing System Based on M-Z Interferometer
Novel Distributed Fiber Bragg Grating Sensing System Based on M-Z Interferometer
复制标题
基于M-Z干涉仪的新型分布式光纤布拉格光栅传感系统
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Lihong
中科院分区：
文献类型：
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作者：
WUGuo;BIWei;Lihong
如何准确测量微小的布拉格波长漂移是使用光栅传感器时遇到的问题之一。目前的解调技术主要基于边缘滤波、可调滤波或干涉扫描等方法。干涉解调技术作为一种高灵敏度的解调技术被广泛接受。介绍了一种采用非平衡光纤M-Z干涉仪作为波长扫描器进行温度测量的干涉扫描法解调系统。提出了一种基于M-Z干涉解调技术的新型光纤Bragg光栅传感系统。实验测得的温度灵敏度与理论计算结果基本一致。
One of the problems in using grating sensors is how to measure a small Bragg wavelength shift accurately. Nowadays demodulation techniques are mainly based on the edge filter, tunable filter, or interferometric scanning methods. Interferometric demodulation is widely accepted as the technology which can provide the high sensitivity. An interrogation system using the interferometric scanning method is presented, in which an unbalanced fiber M-Z interferometer is used as the wavelength scanner for temperature measurement. A novel fiber Bragg grating sensor system based on M-Z interferometric demodulation technique is presented in this paper. The temperature sensitivity measured in the experiment is almost consistent with that obtained from the theoretic calculation.