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Proceedings Paper

Photoacoustic spectroscopy for trace vapor detection and molecular discrimination
Author(s): Ellen Holthoff; John Bender; Paul Pellegrino; Almon Fisher; Nancy Stoffel
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Paper Abstract

Photoacoustic spectroscopy (PAS) is a useful monitoring technique that is well suited for trace gas detection. This method routinely exhibits detection limits at the parts-per-million (ppm) or parts-per-billion (ppb) level for gaseous samples. PAS also possesses favorable detection characteristics when the system dimensions are scaled to a microsystem design. Current research utilizes quantum cascade lasers (QCLs) in combination with micro-electromechanical systems (MEMS)-scale photoacoustic cell designs. This sensing platform has provided favorable detection limits for a standard nerve agent simulant. The objective of the present work is to demonstrate an extremely versatile MEMS-scale photoacoustic sensor system that is able to discriminate between different analytes of interest.

Paper Details

Date Published: 5 May 2010
PDF: 7 pages
Proc. SPIE 7665, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI, 766510 (5 May 2010); doi: 10.1117/12.850118
Show Author Affiliations
Ellen Holthoff, U.S. Army Research Lab. (United States)
John Bender, U.S. Army Research Lab. (United States)
Paul Pellegrino, U.S. Army Research Lab. (United States)
Almon Fisher, Infotonics Technology Ctr. (United States)
Nancy Stoffel, Infotonics Technology Ctr. (United States)

Published in SPIE Proceedings Vol. 7665:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI
Augustus Way Fountain III; Patrick J. Gardner, Editor(s)

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