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Proceedings Paper

High-sensitivity fiber refractive index sensor formed by sandwiching a thinned taper between two abrupt tapers
Author(s): Jinping Chen; Jun Zhou; Lei Shu; Yanan Ma; Haopeng Zhang
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Paper Abstract

A fiber refractive index (RI) sensor based on a Mach–Zehnder interferometer (MZI) formed by sandwiching a thinned taper between two abrupt tapers. The abrupt tapers and the thinned taper are easily fabricated by a commercial fiber fusion splicer and a homemade tapering machine, respectively. The sensor has been experimentally demonstrated for RI sensing by monitoring its spectral shifts. The experimental results show that the sensor with a thinner taper has higher sensitivity due to the strong evanescent field interaction. A sensitivity of 3808.4 nm/RIU (refractive index unit) is obtained, which is about 100 times higher than that of the conventional taper-based MZI sensors.

Paper Details

Date Published: 20 December 2013
PDF: 6 pages
Proc. SPIE 9044, 2013 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 90440D (20 December 2013); doi: 10.1117/12.2038918
Show Author Affiliations
Jinping Chen, Ningbo Univ. (China)
Jun Zhou, Ningbo Univ. (China)
Lei Shu, Ningbo Univ. (China)
Yanan Ma, Ningbo Univ. (China)
Haopeng Zhang, Ningbo Univ. (China)


Published in SPIE Proceedings Vol. 9044:
2013 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Brian Culshaw; Xuping Zhang; Anbo Wang, Editor(s)

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