Standoff hyperspectral imaging of CWAs and explosives using eyesafe quantum cascade laser arrays

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

doi:10.1117/12.2517760

17 May 2019 Standoff hyperspectral imaging of CWAs and explosives using eyesafe quantum cascade laser arrays

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

Author Affiliations +

Proceedings Volume 11010, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX; 1101003 (2019) https://doi.org/10.1117/12.2517760
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

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.

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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, and Daryoosh Vakhshoori "Standoff hyperspectral imaging of CWAs and explosives using eyesafe quantum cascade laser arrays", Proc. SPIE 11010, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX, 1101003 (17 May 2019); https://doi.org/10.1117/12.2517760

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