Share Email Print
cover

Proceedings Paper

Standoff chemical detection using quantum cascade lasers and photoacoustic sensing
Author(s): Xing Chen; Douglas Janssen; Fow-Sen Choa
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We report in this paper the feasibility of standoff chemical detection using quantum cascade lasers (QCLs) and photoacoustic technique. In the experiment, we use a QCL with an emission wavelength near 7.9 μm, an electret condenser microphone, and isopropanol (IPA) vapor as a safer experimental substitute of the explosive, RDX. The QCL is operated at pulsed mode and the laser beam focused on the IPA vapor sample. The photoacoustic sound wave is generated and detected by the microphone at a remote distance. With less than 40 mW laser power, standoff photoacoustic chemical detection distance over 35 cm is achieved.

Paper Details

Date Published: 3 June 2011
PDF: 6 pages
Proc. SPIE 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII, 80180R (3 June 2011); doi: 10.1117/12.884387
Show Author Affiliations
Xing Chen, Univ. of Maryland, Baltimore County (United States)
Douglas Janssen, Greater Grace Christian Academy (United States)
Fow-Sen Choa, Univ. of Maryland, Baltimore County (United States)


Published in SPIE Proceedings Vol. 8018:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII
Augustus W. Fountain; Patrick J. Gardner, Editor(s)

© SPIE. Terms of Use
Back to Top