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Proceedings Paper

A distributed fiber optic chemical sensor for hydrogen cyanide detection
Author(s): Steven R. Cordero; Manal Beshay; Aaron Low; Harold Mukamal; David Ruiz; Robert A. Lieberman
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Paper Abstract

A fiber optic hydrogen cyanide (HCN) sensor having its entire length as the sensing element is reported here. The optical fiber is multimode and consists of a pure fused-silica core and an HCN sensitive cladding. Upon exposure to HCN gas, the cladding rapidly changes color, resulting in attenuation of the fiber's light throughput. The fiber is used to detect HCN at part per million levels, which suggests that the propagating modes of light interact with the cladding. The sensitivity of the fiber as a function of sensor length and challenge concentration will be reported. Prior to exposure, the fiber attenuation measures less than 1 dB/m, making it possible to detect hydrogen cyanide on a continuous length of fiber on the scale of tens of meters. This technology could replace the need for having a collection of point-detectors to cover large areas, and hence lends itself to building and perimeter chemical detection.

Paper Details

Date Published: 8 November 2005
PDF: 8 pages
Proc. SPIE 5993, Advanced Environmental, Chemical, and Biological Sensing Technologies III, 599302 (8 November 2005); doi: 10.1117/12.630958
Show Author Affiliations
Steven R. Cordero, Intelligent Optical Systems, Inc. (United States)
Manal Beshay, Intelligent Optical Systems, Inc. (United States)
Aaron Low, Intelligent Optical Systems, Inc. (United States)
Harold Mukamal, Intelligent Optical Systems, Inc. (United States)
David Ruiz, Intelligent Optical Systems, Inc. (United States)
Robert A. Lieberman, Intelligent Optical Systems, Inc. (United States)


Published in SPIE Proceedings Vol. 5993:
Advanced Environmental, Chemical, and Biological Sensing Technologies III
Tuan Vo-Dinh; Robert A. Lieberman; Gunter Gauglitz, Editor(s)

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