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Proceedings Paper

A study of single-beam femtosecond MCARS in trace material detection
Author(s): Stephen D. Roberson; Sherrie S. Bowman; Paul M. Pellegrino
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Paper Abstract

There is a need for rapid and accurate detection and identification of complex aerosol particles in a number of fields for countless applications. Full identification of these particles has been hampered by the inability to use an information-rich spectroscopic method such as Raman scattering in a flowing aerosol environment due to the time needed to generate a Raman spectrum. Multiplex coherent anti-Stokes Raman spectroscopy (MCARS) has been shown to generate a complete Raman spectrum from the material of interest using a single ultrabroadband pulse to coherently drive multiple molecular vibrations simultaneously. When used in conjunction with a narrow probe pulse, a complete Raman spectrum is created that can be detected in milliseconds. We will report on the MCARS spectra obtained from materials of interest at a distance of 1 m from the sample location. A limit of detection study of the MCARS spectrum of various materials of interest will be also reported in with the nonresonant background both present and removed. Additionally, a limit of detection study as a function of the number of pulses used to comprise the CARS spectrum of the materials of interest will be presented.

Paper Details

Date Published: 2 June 2015
PDF: 8 pages
Proc. SPIE 9455, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVI, 94550X (2 June 2015); doi: 10.1117/12.2181051
Show Author Affiliations
Stephen D. Roberson, U.S. Army Research Lab. (United States)
Sherrie S. Bowman, US Army Research Lab. (United States)
Paul M. Pellegrino, U.S. Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 9455:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVI
Augustus Way Fountain III, Editor(s)

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