Plastic optical fiber sensors for detecting leakage of alkane gases and gasoline vapors

Shinzo Muto; Kohji Uchiyama; Gargi Vishnoi; Masayuki Morisawa; Chan Xin Liang; Hideaki Machida; Koichi Kiso

doi:10.1117/12.323478

25 September 1998 Plastic optical fiber sensors for detecting leakage of alkane gases and gasoline vapors

Shinzo Muto, Kohji Uchiyama, Gargi Vishnoi, Masayuki Morisawa, Chan Xin Liang, Hideaki Machida, Koichi Kiso

Proceedings Volume 3417, Photopolymer Device Physics, Chemistry, and Applications IV; (1998) https://doi.org/10.1117/12.323478
Event: Lasers and Materials in Industry and Opto-Contact Workshop, 1998, Quebec, Canada

Abstract

New optical fiber sensors for detecting leakage of vapor phase alkanes and gasoline have been studied. When exposed to these vapors, certain rubber-type polymers such as polyisoprene and polyisobutylene cause swelling and their refractive indexes decease depending on the vapor pressure of these substances. Based on this effect, the fiber-type sensor heads were fabricated by coating the swelling polymer as a cladding layer on the fiber core with slightly lower refractive index than that of cladding. When was exposed to vapor phase substances, the sensor head changed its fiber structure from leaky to guided one, and then a large change in the transmitted light intensity was observed in a wide range of the vapor pressure. The response was also found to be reversible and reproducible.

Citation Download Citation

Shinzo Muto, Kohji Uchiyama, Gargi Vishnoi, Masayuki Morisawa, Chan Xin Liang, Hideaki Machida, and Koichi Kiso "Plastic optical fiber sensors for detecting leakage of alkane gases and gasoline vapors", Proc. SPIE 3417, Photopolymer Device Physics, Chemistry, and Applications IV, (25 September 1998); https://doi.org/10.1117/12.323478

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