摘要
布喇格光纤光栅(FBG)传感器由于受到自身材料特性的限制,其传感灵敏度较低,如何提高FBG的灵敏度是研究的热点之一。首先理论仿真了具有高热膨胀系数的硅橡胶、环氧树脂和聚二甲基硅氧烷(PDMS)胶3种聚合物涂敷层的FBG,计算了反射谱中心波长偏移量随温度变化的光纤光栅传感温度灵敏度。根据理论分析结果,实验研究了3种聚合物材料涂覆层的FBG的温度传感性能。实验结果表明:具有PDMS材料涂覆层的FBG不仅保持了良好的线性特性,且温度灵敏度可以达到0.0795nm/℃,相对于光栅结构参数相同的裸栅温度灵敏度提升了8倍。
Fiber Bragg grating(FBG) sensor has low sensitivity, because of the limitation of its material characteristic. Improving the sensitivity of FBG is in hotspot. Firstly, the FBG of three polymer coatings with high thermal expansion coefficient, silicone rubber, epoxy resin and polydimethylsiloxane (PDMS) were simulated theoretically. Then calculating the central wavelength offset of the reflection spectrum with temperature and the sensitivity of FBG. The temperature sensing properties of FBG coating of three kinds of polymer materials were examined base on the results of theoretical analysis. The experiment shows that FBG coated by PDMS not only keep a great linear characteristic, but also the temperature sensitivity can reach 0.0795nm/℃ which is 8 times bigger than bare grating with the same grating structure parameters.
作者
魏昊文
徐宁
WEI Haowen;XU Ning(College of Electronic and Optical Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)
出处
《光通信技术》
北大核心
2019年第5期1-4,共4页
Optical Communication Technology
基金
江苏省政策引导类计划项目(BY2016010-01)资助
