中国激光, 2017, 44 (3): 0310001, 网络出版: 2017-03-08   

基于SPR效应和缺陷耦合的光子晶体光纤高灵敏度磁场与温度传感器 下载: 731次

Photonic Crystal Fiber High Sensitivity Magnetic Field and Temperature Sensor Based on Surface Plasma Resonance Effect and Defect Coupling
作者单位
中国矿业大学信息与控制工程学院, 江苏 徐州 221116
摘要
设计了一种基于表面等离子体共振(SPR)效应以及缺陷耦合机理的新型光子晶体光纤传感器。该传感器结构中光子晶体光纤包层的一个特定空气孔内表层被镀上金属薄膜,通过改变另一空气孔直径以形成缺陷,并在这两个空气孔中填充磁流体材料。通过分析磁流体的折射率与温度、磁场的关系,实现了对温度和磁场的同时测量。实验结果表明,耦合谐振峰与SPR损耗峰在温度升高时均产生蓝移,磁场增强时均产生红移。耦合谐振峰与SPR损耗峰的温度灵敏度分别可达到-1.338 nm/℃和-1.575 nm/℃,磁场灵敏度分别为4.333 μm/T和2.816 μm/T。该传感器不仅具有高灵敏度,而且实现了磁场和温度的精确测量。
Abstract
A new photonic crystal fiber sensor based on surface plasma resonance (SPR) effect and defect coupling mechanism is proposed. Two air holes of photonic crystal fiber cladding in the sensor are filled with magnetic fluid material. One hole is coated with metallic thin film on inner layer,and the diameter of the other hole is changed to form defect. By analyzing the relationship among refractive index, temperature and magnetic field of magnetic fluid, the simultaneous measurement for temperature and magnetic field can be achieved. Results show that the coupling resonance peak and the SPR loss peak are blue shifted as temperature increasing and red shifted as magnetic field increasing. The temperature sensitivity of the coupling resonance peak and the SPR loss peak can reach -1.338 nm/℃ and -1.575 nm/℃ respectively, and the magnetic field sensitivity of them is 4.333 μm/T and 2.816 μm/T respectively. The proposed sensor not only has a high sensitivity, but also can achieve accurate measurement for magnetic field and temperature.

朱晟昦, 谭策, 王琰, 高源, 董碧成, 马翰林, 刘海. 基于SPR效应和缺陷耦合的光子晶体光纤高灵敏度磁场与温度传感器[J]. 中国激光, 2017, 44(3): 0310001. Zhu Chenghao, Tan Ce, Wang Yan, Gao Yuan, Dong Bicheng, Ma Hanlin, Liu Hai. Photonic Crystal Fiber High Sensitivity Magnetic Field and Temperature Sensor Based on Surface Plasma Resonance Effect and Defect Coupling[J]. Chinese Journal of Lasers, 2017, 44(3): 0310001.

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