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

Jieyuan Tang; Zhe Chen; Yunhan Luo; Jianhui Yu; Huihui Lu; Jun Zhang; Vincent K. S. Hsiao

doi:10.1117/12.2193895

28 September 2015 Acetone vapor fiber sensor based on side polished fiber coated with cholesteric liquid crystal

Jieyuan Tang, Zhe Chen, Yunhan Luo, Jianhui Yu, Huihui Lu, Jun Zhang, Vincent K. S. Hsiao

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96346H (2015) https://doi.org/10.1117/12.2193895
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

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.

Citation Download Citation

Jieyuan Tang, Zhe Chen, Yunhan Luo, Jianhui Yu, Huihui Lu, Jun Zhang, and Vincent K. S. Hsiao "Acetone vapor fiber sensor based on side polished fiber coated with cholesteric liquid crystal", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96346H (28 September 2015); https://doi.org/10.1117/12.2193895

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KEYWORDS

Liquid crystals

Polishing

Fiber optics sensors

Fiber coatings

Molecules

Sensors

Liquids

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