Photoacoustic spectroscopy for trace vapor detection and molecular discrimination

Ellen Holthoff; John Bender; Paul Pellegrino; Almon Fisher; Nancy Stoffel

doi:10.1117/12.850118

5 May 2010 Photoacoustic spectroscopy for trace vapor detection and molecular discrimination

Ellen Holthoff, John Bender, Paul Pellegrino, Almon Fisher, Nancy Stoffel

Proceedings Volume 7665, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI; 766510 (2010) https://doi.org/10.1117/12.850118
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

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.

Citation Download Citation

Ellen Holthoff, John Bender, Paul Pellegrino, Almon Fisher, and Nancy Stoffel "Photoacoustic spectroscopy for trace vapor detection and molecular discrimination", Proc. SPIE 7665, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI, 766510 (5 May 2010); https://doi.org/10.1117/12.850118

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