Li Zhoubing, Zhang Yue, Ren Chunqiao, Sui Zhengqi, Li Jin
College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang 110819, China.
Sensors (Basel). 2019 Apr 16;19(8):1819. doi: 10.3390/s19081819.
In this paper, a miniature Fabry-Perot temperature probe was designed by using polydimethylsiloxane (PDMS) to encapsulate a microfiber in one cut of hollow core fiber (HCF). The microfiber tip and a common single mode fiber (SMF) end were used as the two reflectors of the Fabry-Perot interferometer. The temperature sensing performance was experimentally demonstrated with a sensitivity of 11.86 nm/°C and an excellent linear fitting in the range of 43-50 °C. This high sensitivity depends on the large thermal-expansion coefficient of PDMS. This temperature sensor can operate no higher than 200 °C limiting by the physicochemical properties of PDMS. The low cost, fast fabrication process, compact structure and outstanding resolution of less than 10 °C enable it being as a promising candidate for exploring the temperature monitor or controller with ultra-high sensitivity and precision.
本文中，通过使用聚二甲基硅氧烷（PDMS）在一段空心光纤（HCF）中封装微光纤，设计了一种微型法布里-珀罗温度探头。微光纤尖端和普通单模光纤（SMF）末端用作法布里-珀罗干涉仪的两个反射镜。通过实验证明了其温度传感性能，灵敏度为11.86 nm/°C，在43 - 50 °C范围内具有出色的线性拟合。这种高灵敏度取决于PDMS的大热膨胀系数。该温度传感器由于PDMS的物理化学性质限制，工作温度不高于200 °C。低成本、快速制造工艺、紧凑结构以及小于10 °C的出色分辨率使其成为探索超高灵敏度和精度的温度监测或控制器的有前途的候选者。
