Li Xuefeng, Qian Chunya, Shen Runjie, Xiao Hui, Zhao Weishi, Ye Song
Opt Express. 2018 Nov 12;26(23):30753-30761. doi: 10.1364/OE.26.030753.
A new type of fluorescence fiber optic temperature sensor based on the detection of fluorescence intensity ratio (FIR) is proposed. Benefited from the temperature-dependent characteristic of upconversion luminescence (UCL), it can be applied in fiber optic temperature sensors. Rare earth doped upconversion nanoparticles (UCNPs) NaYF:Er,Yb are embedded in a multi-mode quartz fiber through the technology of fiber fusion as the sensing unit of temperature sensors. A 980 nm laser is used to stimulate UCL in a temperature range from 40 °C to 100 °C. Experimental validation and spectral analysis are carried out to confirm the rationality of sensors' design. Results show that FIR changes with the temperature in Boltzmann distribution law. The sensitivity of the temperature sensors can reach the value between 0.0087 and 0.0144 K.
提出了一种基于荧光强度比（FIR）检测的新型荧光光纤温度传感器。受益于上转换发光（UCL）的温度依赖性特性，它可应用于光纤温度传感器。通过光纤熔接技术将稀土掺杂上转换纳米颗粒（UCNPs）NaYF:Er,Yb嵌入多模石英光纤中，作为温度传感器的传感单元。使用980 nm激光在40℃至100℃的温度范围内激发UCL。进行了实验验证和光谱分析，以确认传感器设计的合理性。结果表明，FIR随温度按照玻尔兹曼分布定律变化。温度传感器的灵敏度可达0.0087至0.0144 K之间的值。
