Gao H, Xu D, Ye Y, Zhang Y, Shen J, Li C. Fiber-tip polymer filled probe for high-sensitivity temperature sensing and polymer refractometers.
OPTICS EXPRESS 2022;
30:8104-8114. [PMID:
35299558 DOI:
10.1364/oe.449852]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 01/12/2022] [Indexed: 06/14/2023]
Abstract
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.
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