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Proceedings Paper

Temperature sensor based on a tapered optical fiber with ALD nanofilm
Author(s): Shan Zhu; Fufei Pang; Jianxiang Wen; Ziwen Zhao; Tingyun Wang
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Paper Abstract

A temperature sensor with high sensitivity based on a tapered optical fiber with Al2O3 nanofilm by atomic layer deposition (ALD) technology is presented. Attributed to the high refractive index Al2O3 nanofilm overlay, an asymmetry Fabry-Perot interferometer is formed along the tapered fiber. Based on the ray-optic analysis, the resonant dip in the interference transmission spectrum depends on the phase delay variation induced by the Goos-Hänchen shift at the nanofilm-coating interface. As a result, the interference transmission spectrum shows good sensitivity to the change of surrounding refractive index. In this work, a temperature-sensitive silicone gel is coated around the fiber taper with Al2O3 nanofilm to realize a high sensitivity temperature sensor. The high sensitivity of 2.44 nm/°C is obtained.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 963474 (28 September 2015); doi: 10.1117/12.2194542
Show Author Affiliations
Shan Zhu, Shanghai Univ. (China)
Fufei Pang, Shanghai Univ. (China)
Jianxiang Wen, Shanghai Univ. (China)
Ziwen Zhao, Shanghai Univ. (China)
Tingyun Wang, Shanghai Univ. (China)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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