High-Temperature Sensor Based on Fabry-Perot Interferometer in Microfiber Tip

A miniaturized tip Fabry-Perot interferometer (tip-FPI) is proposed for high-temperature sensing. It is simply fabricated for the first time by splicing a short length of microfiber (MF) to the cleaved end of a standard single mode fiber (SMF) with precise control of the relative cross section posit...

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Veröffentlicht in:Sensors (Basel, Switzerland) Switzerland), 2018-01, Vol.18 (1), p.202
Hauptverfasser: Chen, Zhenshi, Xiong, Songsong, Gao, Shecheng, Zhang, Hui, Wan, Lei, Huang, Xincheng, Huang, Bingsen, Feng, Yuanhua, Liu, Weiping, Li, Zhaohui
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Sprache:eng
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Zusammenfassung:A miniaturized tip Fabry-Perot interferometer (tip-FPI) is proposed for high-temperature sensing. It is simply fabricated for the first time by splicing a short length of microfiber (MF) to the cleaved end of a standard single mode fiber (SMF) with precise control of the relative cross section position. Such a MF acts as a Fabry-Perot (FP) cavity and serves as a tip sensor. A change in temperature modifies the length and refractive index of the FP cavity, and then a corresponding change in the reflected interference spectrum can be observed. High temperatures of up to 1000 °C are measured in the experiments, and a high sensitivity of 13.6 pm/°C is achieved. This compact sensor, with tip diameter and length both of tens of microns, is suitable for localized detection, especially in harsh environments.
ISSN:1424-8220
1424-8220
DOI:10.3390/s18010202