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Proceedings Paper

Acetone vapor fiber sensor based on side polished fiber coated with cholesteric liquid crystal
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Paper Abstract

The organic acetone vapor sensing characteristics of side-polished fiber coating with cholesteric liquid crystal film were investigated. The cholesteric liquid crystal used in our experiments is a mixture compound, which contains 30% cholesteryl oleyl carbonate, 60% cholesteryl pelargonat, and 25% cholesteryl chloride. When cholesteric liquid crystal film was coated on the surface of side-polished fiber, an interference transmission spectrum of fiber could be observed. When the fiber is exposing in acetone vapor, a blue shift of the interference spectrum was found. The higher concentration of acetone vapor is, the larger blue shift of spectrum is found. The shift of transmission spectrum is linear to the concentration of acetone vapor. The sensitivity is 1.356nm/vol% when the concentration of acetone vapor ranges from 3vol% to 16vol%. This study demonstrates a new all-fiber low-cost and portable acetone vapor sensor. It can be also used to investigate the helical structure and molecular orientation of cholesteric liquid crystal.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96346H (28 September 2015); doi: 10.1117/12.2193895
Show Author Affiliations
Jieyuan Tang, Jinan Univ. (China)
Zhe Chen, Jinan Univ. (China)
Yunhan Luo, Jinan Univ. (China)
Jianhui Yu, Jinan Univ. (China)
Huihui Lu, Jinan Univ. (China)
Jun Zhang, Jinan Univ. (China)
Vincent K. S. Hsiao, National Chi Nan Univ. (Taiwan)

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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