Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/88902
Title: Optical fiber Fabry-Perot interferometer with pH sensitive hydrogel film for hazardous gases sensing
Authors: Zheng, Yangzi
Chen, Li Han
Chan, Chi Chiu
Dong, Xinyong
Yang, Jingyi
Tou, Zhi Qiang
So, Ping Lam
Keywords: Optical Fiber
Polyvinyl Alcohol
DRNTU::Engineering::Chemical engineering
Issue Date: 2015
Source: Zheng, Y., Chen, L. H., Chan, C. C., Dong, X., Yang, J., Tou, Z. Q., & So, P. L. (2015). Optical fiber Fabry-Perot interferometer with pH sensitive hydrogel film for hazardous gases sensing. Proceedings of SPIE - 24th International Conference on Optical Fibre Sensors, 9634, 963467-. doi:10.1117/12.2194772
Abstract: An optical fiber Fabry-Perot interferometer (FPI) coated with polyvinyl alcohol/poly-acrylic acid (PVA/PAA) hydrogel film for toxic gases measurement has been developed. Splicing a short section of hollow core fiber between two single mode fibers forms the FPI. Dip-coated pH-sensitive PVA/PAA hydrogel film on the fiber end performs as a receptor for binding of volatile acids or ammonia, which makes the sensing film swelling or shrinking and results in the dip wavelength shift of the FPI. By demodulating the evolution of reflection spectrum for various concentrations of volatile acids, a sensitivity of 20.8 nm/ppm is achieved with uniform linearity.
URI: https://hdl.handle.net/10356/88902
http://hdl.handle.net/10220/47001
DOI: 10.1117/12.2194772
Rights: © 2015 Society of Photo-optical Instrumentation Engineers (SPIE). This paper was published in Proceedings of SPIE - 24th International Conference on Optical Fibre Sensors and is made available as an electronic reprint (preprint) with permission of Society of Photo-optical Instrumentation Engineers (SPIE). The published version is available at: [http://dx.doi.org/10.1117/12.2194772]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Conference Papers

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