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Stand-off detection of solid targets with diffuse reflection spectroscopy using a high-power mid-infrared supercontinuum source |
Applied Optics, Vol. 51, Issue 15, pp. 2794-2807 (2012)
http://dx.doi.org/10.1364/AO.51.002794
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Abstract
We measure the diffuse reflection spectrum of solid samples such as explosives (TNT, RDX, PETN), fertilizers (ammonium nitrate, urea), and paints (automotive and military grade) at a stand-off distance of 5 m using a mid-infrared supercontinuum light source with 3.9 W average output power. The output spectrum extends from 750–4300 nm, and it is generated by nonlinear spectral broadening in a 9 m long fluoride fiber pumped by high peak power pulses from a dual-stage erbium-ytterbium fiber amplifier operating at 1543 nm. The samples are distinguished using unique spectral signatures that are attributed to the molecular vibrations of the constituents. Signal-to-noise ratio (SNR) calculations demonstrate the feasibility of increasing the stand-off distance from 5 to
© 2012 Optical Society of America
OCIS Codes
(300.6340) Spectroscopy : Spectroscopy, infrared
(320.6629) Ultrafast optics : Supercontinuum generation
ToC Category:
Spectroscopy
History
Original Manuscript: November 7, 2011
Manuscript Accepted: December 19, 2011
Published: May 14, 2012
Virtual Issues
Vol. 7, Iss. 7 Virtual Journal for Biomedical Optics
Citation
Malay Kumar, Mohammed N. Islam, Fred L. Terry, Michael J. Freeman, Allan Chan, Manickam Neelakandan, and Tariq Manzur, "Stand-off detection of solid targets with diffuse reflection spectroscopy using a high-power mid-infrared supercontinuum source," Appl. Opt. 51, 2794-2807 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-15-2794
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