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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 10 — Apr. 1, 2008
  • pp: 1543–1548

Sub-parts-per-billion level detection of dimethyl methyl phosphonate (DMMP) by quantum cascade laser photoacoustic spectroscopy

Anadi Mukherjee, Ilya Dunayevskiy, Manu Prasanna, Rowel Go, Alexei Tsekoun, Xiaojun Wang, Jenyu Fan, and C. Kumar N. Patel  »View Author Affiliations


Applied Optics, Vol. 47, Issue 10, pp. 1543-1548 (2008)
http://dx.doi.org/10.1364/AO.47.001543


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Abstract

The need for the detection of chemical warfare agents (CWAs) is no longer confined to battlefield environments because of at least one confirmed terrorist attack, the Tokyo Subway [Emerg. Infect. Dis. 5, 513 (1999)] in 1995, and a suspected, i.e., a false-alarm of a CWA in the Russell Senate Office Building [Washington Post, 9 February 2006, p. B01]. Therefore, detection of CWAs with high sensitivity and low false-alarm rates is considered an important priority for ensuring public safety. We report a minimum detection level for a CWA simulant, dimethyl methyl phosphonate (DMMP), of < 0.5 ppb (parts in 10 9 ) by use of a widely tunable external grating cavity quantum cascade laser and photoacoustic spectroscopy. With interferents present in Santa Monica, California street air, we demonstrate a false-alarm rate of 1 : 10 6 at a detection threshold of 1.6 ppb .

© 2008 Optical Society of America

OCIS Codes
(300.6390) Spectroscopy : Spectroscopy, molecular
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Spectroscopy

History
Original Manuscript: January 4, 2008
Manuscript Accepted: February 18, 2008
Published: March 28, 2008

Virtual Issues
Vol. 3, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Anadi Mukherjee, Ilya Dunayevskiy, Manu Prasanna, Rowel Go, Alexei Tsekoun, Xiaojun Wang, Jenyu Fan, and C. Kumar N. Patel, "Sub-parts-per-billion level detection of dimethyl methyl phosphonate (DMMP) by quantum cascade laser photoacoustic spectroscopy," Appl. Opt. 47, 1543-1548 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-10-1543

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