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http://dx.doi.org/10.5369/JSST.2010.19.6.428

Volatile organic compounds gas sensor using side polished optical fiber  

Yeom, Se-Hyuk (School of Electrical Engineering and Computer Science, Kyungpook National University)
Heng, Yuan (School of Electrical Engineering and Computer Science, Kyungpook National University)
Lim, Jun-Woo (Kyungnam College University of Information and Technology)
Kim, Hak-Rin (School of Electronics Engineering, College of IT Engineering, Kyungpook National University)
Kang, Shin-Won (School of Electronics Engineering, College of IT Engineering, Kyungpook National University)
Publication Information
Journal of Sensor Science and Technology / v.19, no.6, 2010 , pp. 428-434 More about this Journal
Abstract
In this study, a novel gas sensor based on evanescent field coupling between single mode side polished fiber and solvatochromic dye dispersed polymer waveguide was demonstrated. We fabricated a side polished optical fiber device as a volatile organic compounds gas detector. Solvatochromic dye was coated on the top of the side polished optical fiber to take advantage of evanescent field coupling. The solvatochromism can be defined as the phenomenon whereby a compound changes color, either by a change in the absorption or emission spectra of molecule, when reacted in different VOCs. The device reacted to polarity gases like a hexane, butane, xylene etc. The resonance wavelength was shifted by the xylene concentration which range was 0.1 ppm ~ 100 ppm. Also, the response with the concentration was lineer and the detection limit was 0.1 ppb.
Keywords
side polished optical fiber; Reichardt's dye; solvatochromism; gas sensor; VOCs;
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Times Cited By KSCI : 3  (Citation Analysis)
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