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Lab-on-a-Fiber Device for Trace Vapor TNT Explosive Detection: Comprehensive Performance Evaluation

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7 Author(s)
Jianjun Ma ; Centre de Rech. en photonique, Univ. du Quebec en Outaouais, Gatineau, QC, Canada ; Kos, A. ; Bock, W.J. ; Xianzhe Li
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Based on the previously proposed concept of a lab on a fiber (LOF) and an LOF-based platform for detecting trace vapors of TNT explosives, in this paper, we study the compatibility of the LOF device with a preconcentration unit. We report the detail investigation of factors that crucially affect the overall performance of this LOF platform. From a theoretical perspective, we investigate the efficiency of a light source formed at the fiber tip on sensory film excitation. Experimentally, we demonstrate the much faster response time of the LOF over a sensory film on a bulky planar glass substrate. We also evaluate the following factors that significantly impact the sensitivity of the instrumentation system: 1) the proper bond between the sensory film and the fiber surface; 2) the concentration of polymer solution for thin-film formation; and 3) the degradation of thin film in the presence of ambient light and the oxygen content in the air.

Published in:

Lightwave Technology, Journal of  (Volume:30 ,  Issue: 8 )

Date of Publication:

April15, 2012

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