针对光纤温度传感装置普遍结构复杂且灵敏度偏低的问题, 文章提出并仿真验证了一种具有高灵敏度的椭圆形气孔温度传感装置。利用表面等离子体技术与光纤温度传感技术相结合实现温度传感。在光纤外侧包覆一层金属膜, 待测物质使用氯仿酒精混合物作为温度感应物质, 通过有限元矢量软件COMSOL进行模拟仿真。仿真结果表明, 当入射波长由0.5 μm增加到1.0 μm时, 其温度测量区间为-20~120 ℃, 可以得到最大光谱灵敏度6 nm/℃, 分辨率为1 337.12 RIU-1, 测量精度为2.85×10-5 RIU。

Aiming at the problem that the optical fiber temperature sensing device generally has a complicated structure and low sensitivity, an elliptical stomata temperature sensing device with high sensitivity is proposed and investigated in this paper. Temperature sensing is achieved based on surface plasmon and optical fiber temperature sensing technologies. It is mainly coated with a metal film on the outside of the fiber. The substance under test uses a mixture of chloroform and alcohol as a temperature-sensitive substance, which is simulated through the finite element vector software COMSOL. Simulation results show that when the incident wavelength is increased from 0.5 μm to 1.0 μm, the temperature measurement range is -20 ~120 ℃, the maximum spectral sensitivity is 6 nm/℃, the resolution is 1 337.12 RIU-1, and the measurement accuracy is 2.85×10-5 RIU.