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Proceedings Paper

Detection of explosive analytes using a fiber-based optical Fabry-Perot gas sensor
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Paper Abstract

We demonstrate the rapid detection of explosive vapors based on a fiber-based optical Fabry-Pérot (FP) gas sensor. The sensing probe of the FP sensor is composed of a thin metal layer and a vapor-sensitive polymer layer that are deposited sequentially on a cleaved fiber endface to form an FP cavity. The interference spectrum generated from the reflected light at the metal-polymer and polymer-air interfaces changes upon the absorption of gas analyte. By monitoring the interference shift, we are able to obtain quantitative and knetic information of the interaction between the analyte and the polymer layer. We further assemble the FP sensor with a short fused silica capillary into a sensor module, and employ it in a gas chromotgraphy (GC) system for selevtive rapid on-column detection. In this report, we specifically target 2, 4- dinitrotoluene (DNT) and 2, 4, 6-trinitrotoluene (TNT) for their obvious defense applications. This work could lead to a portable sensor capable of detecting low concentrations of DNT, TNT, and other explosive chemicals.

Paper Details

Date Published: 24 April 2010
PDF: 5 pages
Proc. SPIE 7673, Advanced Environmental, Chemical, and Biological Sensing Technologies VII, 76730E (24 April 2010); doi: 10.1117/12.850255
Show Author Affiliations
Jing Liu, Univ. of Michigan (United States)
Univ. of Missouri-Columbia (United States)
Daniel J. Howard, Univ. of Missouri-Columbia (United States)
Paul Whiteside, Univ. of Missouri-Columbia (United States)
Yuze Sun, Univ. of Michigan (United States)
Univ. of Missouri-Columbia (United States)
Mahmoud Almasri, Univ. of Missouri-Columbia (United States)
Greg Frye-Mason, ICx Biodefense (United States)
Aaron Thompson, ICx Nomadics, Inc. (United States)
Shiou-jyh Ja, ICx Nomadics, Inc. (United States)
Xudong Fan, Univ. of Michigan (United States)
Univ. of Missouri-Columbia (United States)


Published in SPIE Proceedings Vol. 7673:
Advanced Environmental, Chemical, and Biological Sensing Technologies VII
Tuan Vo-Dinh; Robert A. Lieberman; Günter Gauglitz, Editor(s)

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