Temperature,as an important basic parameter of environmental changes,the rapid and accurate detection method has attracted the attention of scientific and industrial circles.This paper proposes and verifies a single-mode optical fiber temperature sensor that based on the Fabry-Perot interference structure of a polymer microcavity.In the sensor,a certain depth of concave groove on the end face of a single-mode optical fiber(SMF)was obtain by the corrosion of 40 % hydrofluoric acid(HF)solution,and a certain concentration of polymethyl methacrylate(PMMA)solution was transferred into the groove.The fiber groove is cured in a vacuum environment to form a polymer FP microcavity sensing structure.The experiment researched the law of groove corrosion depth,width and corrosion time,and proved the application of the structure in temperature measurement.The experimental results show that the sensor achieves a temperature sensitivity of 182.5 pm/℃ in the temperature range of 70~86 ℃ when the corrosion depth is 8~9 μm,and it has a good linear response(0.9588).The sensor has the potential for mass production due to simple preparation process,compact structure and low-cost.
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李望,罗韵,彭志清,冯国英.基于聚合物填充的微结构光纤温度传感器[J].激光与红外,2021,51(5):652~656 LI Wang, LUO Yun, PENG Zhi-qing, FENG Guo-ying. Chemical corrosion-polymer filled microstructure optical fiber temperature sensor[J]. LASER & INFRARED,2021,51(5):652~656