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Standoff hyperspectral imaging of CWAs and explosives using eyesafe quantum cascade laser arrays
Author(s): Mark F. Witinski; Brandt Pein; Romain Blanchard; Gokhan Ulu; Greg Vander Rhodes; Kalyani Krishnamurthy; Chris R. Howle; Linda Lee; Rhea J. Clewes; Siobhan M. Conner; Daryoosh Vakhshoori
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Paper Abstract

This article presents new hyperspectral imaging (HSI) results from a standoff chemical detection system that utilizes monolithic arrays of Distributed Feedback (DFB) Quantum Cascade Lasers (QCLs) as a source, with each array element at a slightly different wavelength than its neighbor. In this rastering approach to HSI, analysis of analyte/substrate pairs benefits from a laser source with characteristics offered uniquely by a QCL Array. In addition to describing the HSI system developed, a description of experimental standoff detection results using the man-portable system from 1.4 meters are presented. We present HSI results on two very different chemical substrate pairs; trace solid PETN on aluminum and the liquid VX on polycarbonate.

Paper Details

Date Published: 17 May 2019
PDF: 6 pages
Proc. SPIE 11010, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX, 1101003 (17 May 2019); doi: 10.1117/12.2517760
Show Author Affiliations
Mark F. Witinski, Pendar Technologies (United States)
Brandt Pein, Pendar Technologies (United States)
Romain Blanchard, Pendar Technologies (United States)
Gokhan Ulu, Pendar Technologies (United States)
Greg Vander Rhodes, Pendar Technologies (United States)
Kalyani Krishnamurthy, Pendar Technologies (United States)
Chris R. Howle, Defence Science and Technology Lab. (United Kingdom)
Linda Lee, Defence Science and Technology Lab. (United Kingdom)
Rhea J. Clewes, Defence Science and Technology Lab. (United Kingdom)
Siobhan M. Conner, Defense Science and Technology Lab. (United Kingdom)
Daryoosh Vakhshoori, Pendar Technologies (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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