Gao Haitao, Xu Danping, Ye Yongyi, Zhang Yanan, Shen Jian, Li Chaoyang
Opt Express. 2022 Feb 28;30(5):8104-8114. doi: 10.1364/OE.449852.
A compact and robust Fabry-Perot interferometer (FPI) based on polymer core is proposed and experimentally demonstrated. The fabrication is low-cost and has simple processes, including fusion splicing and polymer injection. Its characteristic is that the polymer fills the entire capillary core, which is easy to demodulate, and provides a good platform for the refractive index measurement of the polymer after curing. The experimental result shows a linear temperature sensitivity of 1226.64 pm/°C between 39°C and 54°C. Furthermore, we also used the Vernier effect to improve the temperature sensitivity as high as -15.617 nm/°C. The proposed FPI structure provides potential application in the research of sensors and polymer optical fibers.
提出并通过实验证明了一种基于聚合物芯的紧凑型且坚固的法布里-珀罗干涉仪（FPI）。其制造成本低且工艺简单，包括熔接和聚合物注入。其特点是聚合物填充整个毛细管芯，易于解调，并为固化后聚合物的折射率测量提供了良好平台。实验结果表明，在39°C至54°C之间线性温度灵敏度为1226.64 pm/°C。此外，我们还利用游标效应将温度灵敏度提高至-15.617 nm/°C。所提出的FPI结构在传感器和聚合物光纤研究中具有潜在应用。
