High Sensitivity Optical Fiber Curvature Sensor Based on Cascaded Fiber Interferometer
High Sensitivity Optical Fiber Curvature Sensor Based on Cascaded Fiber Interferometer
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DOI：
10.1109/jlt.2017.2771507
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发表时间：
2018-02-15
影响因子：
4.7
通讯作者：
Guo, Yongxin
中科院分区：
文献类型：
--
作者：
Dong, Shandong;Dong, Bo;Guo, Yongxin
从理论和实验两方面研究了一种基于级联光纤干涉仪的高灵敏度光纤曲率传感器。理论分析表明，级联光纤干涉仪方案可以看作是一个等效的光纤干涉仪，具有较长的干涉长度和较窄的FSR。它作为曲率传感器，在0-1.134 m（-1）的测量范围内，灵敏度高达4.362 nm/m（-1）。与单光纤模式干涉仪相比，该干涉仪的曲率灵敏度提高了近一倍。此外，利用系数矩阵法实现了曲率和温度的同时测量，消除了温度交叉敏感问题。
A highly sensitive optical fiber curvature sensor based on cascaded fiber interferometers (CFIs) is demonstrated theoretically and experimentally. Theoretical results show that the scheme of cascaded fiber interferometers can be regarded as an equivalent fiber interferometer with longer interference length and narrower FSR. It serves as a curvature sensor with sensitivity up to 4.362 nm/m(-1) within the measurement range of 0-1.134 m(-1). Compared to the single fiber modal interferometer, the curvature sensitivity of the CFI is almost doubled. In addition, simultaneous curvature and temperature measurement is achieved using the coefficient matrix method, eliminating the issue of temperature cross sensitivity.