基于荧光强度比技术的强抗干扰柔性荧光光纤温度传感器  

Strong Interference-Resistant Flexible Fluorescent Fiber Optic Temperature Sensor Based on Fluorescence Intensity Ratio Technology

作　　者：杨安平 周鸿猷 方婕 苏斯杰 宋向阳[1,2,3] 黄梓琪 甘久林 Yang Anping;Zhou Hongyou;Fang Jie;Su Sijie;Song Xiangyang;Huang Ziqi;Gan Jiulin(State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510641,Guangdong,China;Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices,Guangzhou 510641,Guangdong,China;Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,Guangzhou 510641,Guangdong,China;School of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,Guangdong,China)

机构地区：[1]华南理工大学发光材料与器件国家重点实验室,广东广州510641 [2]广东省特种光纤材料与器件工程技术研究开发中心,广东广州510641 [3]广东省光纤激光材料与应用技术重点实验室,广东广州510641 [4]华南理工大学材料科学与工程学院,广东广州510641

出　　处：《激光与光电子学进展》2023年第13期65-72,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62075064,62235014);广东省自然科学基金(2021B1515020095);中央高校基本科研业务费专项资金(2022ZYGXZR003)。

摘　　要：为提高接触式柔性光纤温度传感器的稳定性和抗干扰性,提出了一种基于荧光强度比技术解调方法的上转换荧光纳米粒子掺杂的柔性荧光光纤温度传感器。稀土离子掺杂的复合柔性光纤受激发射出稳定荧光,依靠上转换纳米粒子热耦合能级对温度的依赖特性,热耦合能级对应的中心荧光峰的强度随着温度的变化而变化。所提柔性光纤温度传感器将掺杂Er^(3+)的热耦合能级对应的中心荧光峰强度的比值作为温度的表征值,且其温度响应表现为热增强型,即荧光强度随着温度的升高而增强。实验结果表明柔性光纤温度传感器表现出强稳定性和强抗干扰性,同时具备良好的柔性和变形能力、高灵敏度和可重复性,最大绝对灵敏度为0.0038℃^(-1)、最大相对灵敏度为1.29%/℃。A flexible fluorescent fiber temperature sensor doped with upconversion fluorescent nanoparticles based on fluorescence intensity ratio(FIR)technology is proposed to improve the stability and anti-interference of contact flexible fiber temperature sensor.The composite flexible fiber doped with rare earth ions emits stable fluorescence when excited,and the intensity of the central fluorescence peak corresponding to the thermal coupling energy level of upconversion nanoparticles follows the changes of temperature.The proposed flexible fiber temperature sensor mainly uses the ratio of the center fluorescence peak intensity corresponding to the thermal coupling energy level of the doped Er^(3+)after FIR treatment as the characterization value.Its temperature response is thermally enhanced which means the fluorescence intensity is enhanced with the increase of temperature.The experimental results show that the proposed sensor exhibits high stability and strong anti-interference,as well as good flexibility and deformation capability,high sensitivity and repeatability.The maximum absolute sensitivity and the maximum relative sensitivity are 0.0038℃^(-1) and 1.29%/℃,respectively.

关 键 词：荧光强度比技术 热耦合能级 柔性光纤温度传感器 抗干扰性 

分 类 号：TN252[电子电信—物理电子学]