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

发布时间：2018-06-14 14:06

  本文选题：传感器 + 光子晶体光纤　； 参考：《中国激光》2017年03期

【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4.333μm/T和2.816μm/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 novel photonic crystal fiber sensor based on surface plasmon resonance (SPR) effect and defect coupling mechanism is designed. In the sensor structure, the inner surface of a particular air hole in the photonic crystal fiber cladding layer is coated with metal film, and the defect is formed by changing the diameter of the other air hole, and the magnetic fluid material is filled in the two air holes. By analyzing the relationship between the refractive index of magnetic fluid and temperature and magnetic field, the simultaneous measurement of temperature and magnetic field is realized. The experimental results show that both the coupling resonance peak and the SPR loss peak show a blue shift when the temperature rises and the red shift occurs when the magnetic field is enhanced. The temperature sensitivity of the coupled resonance peak and the SPR loss peak can reach -1.338 nm/ 鈩，

本文编号：2017651