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Proceedings Paper

A new modality for the detection of chemical vapors using middle infrared femtosecond pulse propagation effects
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Paper Abstract

We have shown recently that unique optical signatures can be observed with the measurement of ultrashort middle infrared laser pulses that have been transmitted through molecular vapors. Here, we report on an increased signal-to-noise ratio of the pulse measurements by using a cross-correlation technique with a lockin amplifier. Carbon tetrafluoride and dimethyl methylphosphonate (DMMP) cross-correlation signatures are highly discriminated using principal component analysis. A squared exponential Gaussian process regression model is used to quantitatively predict the concentration of DMMP.

Paper Details

Date Published: 17 May 2019
PDF: 16 pages
Proc. SPIE 11010, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX, 110100X (17 May 2019); doi: 10.1117/12.2520793
Show Author Affiliations
William Conner Thomas, Univ. of Nebraska-Lincoln (United States)
Craig A. Zuhlke, Univ. of Nebraska-Lincoln (United States)
Dennis R. Alexander, Univ. of Nebraska-Lincoln (United States)


Published in SPIE Proceedings Vol. 11010:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX
Jason A. Guicheteau; Chris R. Howle, Editor(s)

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