Simple thin-film fiber optic temperature sensor based on Fabry-Perot interference

Ji-Huan Chen; Xu Guang Huang; Zhen-Jian Huang

doi:10.1117/1.3407460

1 April 2010 Simple thin-film fiber optic temperature sensor based on Fabry-Perot interference

Ji-Huan Chen, Xu Guang Huang, Zhen-Jian Huang

Author Affiliations +

Optical Engineering, Vol. 49, Issue 4, 044402 (April 2010). https://doi.org/10.1117/1.3407460

Abstract

A simple fiber optic temperature sensor with a micro Fabry-Perot cavity constructed with a thin film coated on a fiber end is presented. Its operation principle is based on the temperature-dependent wavelength shift of the interference fringes formed by Fresnel reflections from both interfaces of the thin film. An analytical formula is derived from the theory of two-beam interference. Experimental temperature data agree with the theoretical result. A temperature resolution of 0.1 K within the range from 20 to 100 °C with good stability can be achieved. The proposed temperature sensor has a simple, solid, and compact structure.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Ji-Huan Chen, Xu Guang Huang, and Zhen-Jian Huang "Simple thin-film fiber optic temperature sensor based on Fabry-Perot interference," Optical Engineering 49(4), 044402 (1 April 2010). https://doi.org/10.1117/1.3407460

Published: 1 April 2010

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