P2.3.3 VOC gas detection using solvatochromic dye coated side polished optical fiber

Se-Hyuk Yeom, Byoung-Ho Kang, Kyu-Jin Kim, Heng Yuan, Dae-Hyuk Kwon, Sung-Hoon Kim & Shin-Won Kang
A high sensitive volatile organic compounds (VOCs) gas sensor using side-polished optical fiber was developed in this study. The surface of the side-polished optical fiber coupled with the coated solvatochromic dye which has charge-transfer (CT) characters. Dimethylamine, acetic acid, toluene, benzene, and ethanol 5-types of VOCs gases were detected in this study. The different polarities of the VOCs gases cause different CT and different effective refractive index changings of the sensing membrane, which can lead...