Identification of targets at remote distances with Raman spectroscopy

In the past few years, there has arisen an intense demand for new generation technologies which provide for the rapid and sensitive stand-off detection of explosive compounds and hazardous chemicals. This has been fueled, in large part, by the escalation of threats to homeland security and the debilitating effects of IED devices in both civilian and war zones. In this paper, we describe two portable stand-off Raman spectrometers which have been developed by DeltaNu and are intended for use in different test environments. The first, the DeltaNu ObserveR™, is a handheld785 nm laser device suited for the close range detection of explosive materials during nighttime operations, or indoors under restricted light conditions. The second device, the ObserveR LR, is a tripod-mounted, solar blind system that enables detection at longer distances (ca. <30 m) with reduced fluorescence interference. A condensed summary is presented of different tests that have been conducted using these devices, and results are discussed within the context of technological improvements that will be required to adequately meet the challenge of robust explosive material detection.

[1]  Reinhard Noll,et al.  Automated Detection of Fingerprint Traces of High Explosives Using Ultraviolet Raman Spectroscopy , 2009, Applied spectroscopy.

[2]  Michael Gaft,et al.  Absolute Raman cross-sections of some explosives : Trend to UV , 2008 .

[3]  S. Rosenwaks,et al.  Detection of particles of explosives via backward coherent anti-Stokes Raman spectroscopy , 2008 .

[4]  Roshan L. Aggarwal,et al.  Measurement of the absolute Raman scattering cross sections of sulfur and the standoff Raman detection of a 6‐mm‐thick sulfur specimen at 1500 m , 2011 .

[5]  L. Pacheco-Londoño,et al.  Vibrational spectroscopy standoff detection of explosives , 2009, Analytical and bioanalytical chemistry.

[6]  Satoru Tanaka,et al.  Few-layer epitaxial graphene grown on vicinal 6H-SiC studied by deep ultraviolet Raman spectroscopy , 2010 .

[7]  Arthur J. Sedlacek,et al.  Ultraviolet mini-Raman lidar for stand-off, in situ identification of chemical surface contaminants , 2000 .

[8]  Bernhard Lendl,et al.  Stand-off Raman spectroscopy , 2009 .

[9]  Aaron M. Hyre,et al.  Ultraviolet Raman Spectra and Cross-Sections of the G-series Nerve Agents , 2008, Applied spectroscopy.

[10]  A. Pettersson,et al.  Laser-based standoff detection of explosives: a critical review , 2009, Analytical and bioanalytical chemistry.

[11]  Shiv k. Sharma,et al.  Stand-off Raman detection using dispersive and tunable filter based systems. , 2005, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[12]  M. Gaft,et al.  Narrow gated Raman and luminescence of explosives , 2009 .

[13]  J. S. Caygill,et al.  Current trends in explosive detection techniques. , 2012, Talanta.

[14]  Chase A. Munson,et al.  Laser-induced breakdown spectroscopy for detection of explosives residues: a review of recent advances, challenges, and future prospects , 2009, Analytical and bioanalytical chemistry.

[15]  Ida Johansson,et al.  Near Real‐Time Standoff Detection of Explosives in a Realistic Outdoor Environment at 55 m Distance , 2009 .

[16]  R.M. Wentworth,et al.  Standoff Raman hyperspectral imaging detection of explosives , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[17]  Richard E. Whipple,et al.  Standoff Detection of High Explosive Materials at 50 Meters in Ambient Light Conditions Using a Small Raman Instrument , 2005, Applied spectroscopy.

[18]  Shiv k. Sharma,et al.  Portable remote Raman system for monitoring hydrocarbon, gas hydrates and explosives in the environment. , 2005, Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.

[19]  F. J. Fortes,et al.  The development of fieldable laser-induced breakdown spectrometer: No limits on the horizon , 2010 .

[20]  J. Moros,et al.  Simultaneous Raman spectroscopy-laser-induced breakdown spectroscopy for instant standoff analysis of explosives using a mobile integrated sensor platform. , 2010, Analytical chemistry.

[21]  Kimberlee J. Kearfott,et al.  The Detection of Explosive Materials: Review of Considerations and Methods , 2010 .

[22]  K. H. Fung,et al.  Stand-off Detection of Chemicals by UV Raman Spectroscopy , 2000 .

[23]  Emad L. Izake,et al.  Forensic and homeland security applications of modern portable Raman spectroscopy. , 2010, Forensic science international.

[24]  Brian E. Lemoff,et al.  Deep Ultraviolet Resonance Raman Excitation Enables Explosives Detection , 2010, Applied spectroscopy.

[25]  Andreas Jakobsson,et al.  Classification of Raman Spectra to Detect Hidden Explosives , 2011, IEEE Geoscience and Remote Sensing Letters.

[26]  J. J. Laserna,et al.  Standoff detection of explosives: critical comparison for ensuing options on Raman spectroscopy–LIBS sensor fusion , 2011, Analytical and bioanalytical chemistry.

[27]  F. J. Fortes,et al.  Laser-induced breakdown spectroscopy. , 2013, Analytical chemistry.

[28]  Michael Gaft,et al.  UV gated Raman spectroscopy for standoff detection of explosives , 2008 .

[29]  Marcos Dantus,et al.  Standoff and arms-length detection of chemicals with single-beam coherent anti-Stokes Raman scattering. , 2009, Applied optics.