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Study on the Method of Matching Detection of Fiber Grating Vibration Sensor
Author(s): SHENG Qiuqin, SHI Kebin, GAO Limo, JIA Baohua, FENG Danqin
Pages: 847-
851
Year: 2002
Issue:
7
Journal: ACTA OPTICA SINICA
Keyword: 光纤光栅振动传感; 匹配检测; 强度解调;
Abstract: 介绍了用匹配光纤布拉格光栅(FBG)对振动传感进行直接的光强调制,从而完成传感及解调过程的方法.首先从理论上推导了光纤光栅的反射、透射谱的表达式,对光纤光栅的传感机制给出了定性的解释,并建立了数学模型进行模拟.进而报道了利用匹配光纤光栅进行单点解调,将振动传感信号变为解调光栅的输出光强信号,从而进行检测的方法.实验结果与理论吻合得很好,证明该方法是可行的.
Citations