Sensitivity-enhanced fiber interferometric high temperature sensor based on Vernier effect

X. Q. Lei; X. P. Dong

doi:10.1117/12.2530864

17 September 2019 Sensitivity-enhanced fiber interferometric high temperature sensor based on Vernier effect

X. Q. Lei, X. P. Dong

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Proceedings Volume 11144, Photonics and Education in Measurement Science 2019; 1114405 (2019) https://doi.org/10.1117/12.2530864
Event: Joint TC1 - TC2 International Symposium on Photonics and Education in Measurement Science 2019, 2019, Jena, Germany

Abstract

A novel sensitivity-enhanced intrinsic fiber Fabry-Perot interferometer (IFFPI) high temperature sensor based on a hollow- core photonic crystal fiber (HC-PCF) and modified Vernier effect is proposed and experimentally demonstrated. The all fiber IFFPIs are easily constructed by splicing one end of the HC-PCF to a leading single mode fiber (SMF) and applying an arc at the other end of the HC-PCF to form a pure silica tip. The modified Vernier effect is formed by three beams of lights reflected from the SMF-PCF splicing joint, and the two air/glass interfaces on the ends of the collapsed HC-PCF tip, respectively. Vernier effect was first applied to high temperature sensing up to 1200°C, in this work, and the experimental results exhibit good stability and repeatability. The temperature sensitivity, measured from the spectrum envelope, is 14 to 57 times higher than that of other configurations using similar HC-PCFs without the Vernier effect. The proposed sensor has the advantages of high sensitivity, good stability, compactness, ease of fabrication, and has potential application in practical high-temperature measurements.

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X. Q. Lei and X. P. Dong "Sensitivity-enhanced fiber interferometric high temperature sensor based on Vernier effect", Proc. SPIE 11144, Photonics and Education in Measurement Science 2019, 1114405 (17 September 2019); https://doi.org/10.1117/12.2530864

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