Methodology for using active infrared spectroscopy in standoff detection of trace explosives

Christopher J. Breshike; Christopher A. Kendziora; Robert Furstenberg; Viet Nguyen; R. Andrew McGill

doi:10.1117/12.2262199

3 May 2017 Methodology for using active infrared spectroscopy in standoff detection of trace explosives

Christopher J. Breshike, Christopher A. Kendziora, Robert Furstenberg, Viet Nguyen, R. Andrew McGill

Proceedings Volume 10183, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVIII; 1018302 (2017) https://doi.org/10.1117/12.2262199
Event: SPIE Defense + Security, 2017, Anaheim, CA, United States

Abstract

This manuscript describes a mobile stand-off detection and identification of trace amounts of hazardous materials, specifically explosives. The technique utilizes an array of tunable infrared quantum cascade lasers as an illumination source which spans wavelengths from 6 to 11 μm, operated at eye-safe power levels. This spectral range enables excitation of a wide variety of absorption bands present in analytes of interest. The laser is modulated to produce a 50% duty cycle, square wave pulses, and control the frequency of irradiation. The backscatter and photo-thermal signals from samples are measured via an IR focal plane array, which allows for the observation of spatial, temporal, and thermal surface processes. A discussion of how these signals are collected and processed for use in identification of hazardous materials is presented.

Conference Presentation

Citation Download Citation

Christopher J. Breshike, Christopher A. Kendziora, Robert Furstenberg, Viet Nguyen, and R. Andrew McGill "Methodology for using active infrared spectroscopy in standoff detection of trace explosives", Proc. SPIE 10183, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVIII, 1018302 (3 May 2017); https://doi.org/10.1117/12.2262199

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