Fresnel-reflection-based fiber optic cryogenic temperature sensor

Umesh Sampath; Dae-gil Kim; Hyunjin Kim; Minho Song

doi:10.1117/12.2265591

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23 April 2017 Fresnel-reflection-based fiber optic cryogenic temperature sensor

Umesh Sampath, Dae-gil Kim, Hyunjin Kim, Minho Song

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Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103234D (2017) https://doi.org/10.1117/12.2265591
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

In this paper, Fresnel reflection based fiber-optic sensor for the real-time monitoring of cryogenic temperature is presented. The proposed sensor system utilizes a linear thermo-optic coefficient of polymer and Fresnel reflection of the fiber end. Epoxy resin and poly methyl metha acrylate (PMMA) are used as sensor head material. The designed sensor head measures the temperature ranging from -180°C to 25°C with an average sensitivity of 0.039dB/°C for epoxy resin and 0.029dB/°C for PMMA. Experimental results have proven the stability and the effectiveness of the proposed sensor system to measure the applied cryogenic temperatures.

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Umesh Sampath, Dae-gil Kim, Hyunjin Kim, and Minho Song "Fresnel-reflection-based fiber optic cryogenic temperature sensor", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103234D (23 April 2017); https://doi.org/10.1117/12.2265591

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