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Proceedings Paper

Fiber-optic refractive index sensor based on cladding-mode resonance
Author(s): Fufei Pang; Huanhuan Liu; Na Chen; Yunqi Liu; Xianglong Zeng; Zhenyi Chen; Tingyun Wang
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Paper Abstract

A fiber-optic refractive index (RI) sensor is proposed based on a double-cladding special fiber. The double-cladding fiber (DCF) consists of core, inner cladding and outer cladding. And refractive index of core and outer cladding is higher than that of inner cladding. Through evanescent wave coupling, cladding mode can be excited resonantly at phase-matched wavelength. Because the cladding mode transmission is sensitive to ambient refractive index variation, the DCF can be used to solution refractive index sensor. By splicing a section DCF into standard single mode fiber (SMF), SMF-DCFSMF sensor was constructed and studied for refractive index sensing. A resonant wavelength shift of 65nm was achieved by changing ambient refractive index within the range of 1~1.4525.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75036W (5 October 2009); doi: 10.1117/12.834096
Show Author Affiliations
Fufei Pang, Shanghai Univ. (China)
Huanhuan Liu, Shanghai Univ. (China)
Na Chen, Shanghai Univ. (China)
Yunqi Liu, Shanghai Univ. (China)
Xianglong Zeng, Shanghai Univ. (China)
Zhenyi Chen, Shanghai Univ. (China)
Tingyun Wang, Shanghai Univ. (China)

Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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