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13 March 2024 VOC gas sensor based on an optical fiber ferrule coated with a porous cholesteric liquid crystal film
Soyeon Ahn, Na Hyeon Hwang, Byeong Kwon Choi, Ji Su Kim, Sung Yoon Cho, Min Yong Jeon
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Proceedings Volume PC12835, Optical Fibers and Sensors for Medical Diagnostics, Treatment, and Environmental Applications XXIV; PC128350Q (2024) https://doi.org/10.1117/12.3011681
Event: SPIE BiOS, 2024, San Francisco, California, United States
Abstract
In this study, the feasibility of a volatile organic compounds (VOC) gas sensor was confirmed through a porous cholesteric liquid crystal film (CLCF) coated on the cross-section of an optical fiber ferrule. The device was fabricated by injecting the CLCF mixture between two ferrules and then UV cured. After separating the two ferrules, porous CLCF was prepared by immersing the CLCF-coated ferrule in acetone. To measure the change in the reflection spectrum of the device for each VOC gas, a broadband wavelength swept laser with a 10dB bandwidth of ~430nm was used. In conclusion, it was found that the reflection band was continuously red-shifted for acetone gas and THF gas.
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Soyeon Ahn, Na Hyeon Hwang, Byeong Kwon Choi, Ji Su Kim, Sung Yoon Cho, and Min Yong Jeon "VOC gas sensor based on an optical fiber ferrule coated with a porous cholesteric liquid crystal film", Proc. SPIE PC12835, Optical Fibers and Sensors for Medical Diagnostics, Treatment, and Environmental Applications XXIV, PC128350Q (13 March 2024); https://doi.org/10.1117/12.3011681
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KEYWORDS
Gas sensors
Porosity
Liquid crystals
Optical fibers
Reflection
Acetone
Pollution
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