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Proceedings Paper

Terahertz imaging and spectroscopy for landmine detection
Author(s): Michael J. Fitch; Dunja Schauki; Craig A. Kelly; Robert Osiander
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Paper Abstract

Pulsed THz (100 GHz - 30 THz) Imaging Spectroscopy combines three ways of mine detection in one system, high resolution radar, depth ranging, and infrared spectroscopy. It allows minefield detection, single mine imaging, and near-zero false alarm due to the capabilities of explosives / plastic identification using spectroscopy with working distances to 1000 feet. We have previously demonstrated imaging capabilities with 1 mm spatial resolution on a rubber O-ring embedded in sand. The estimated transmission depth in moist sand is 1 to 3 cm, which should be sufficient for imaging anti-personnel mines. In this work, we present initial results investigating the feasibility of THz spectroscopy in the frequency range from 1 to 10 THz to detect and identify explosives and related compounds (ERCs). A major component of this effort is chemical modeling to obtain spectroscopic information on ERCs and environmental background. A time-domain THz system using femtosecond laser pulses is also being developed.

Paper Details

Date Published: 8 April 2004
PDF: 10 pages
Proc. SPIE 5354, Terahertz and Gigahertz Electronics and Photonics III, (8 April 2004);
Show Author Affiliations
Michael J. Fitch, Johns Hopkins Univ. (United States)
Dunja Schauki, Johns Hopkins Univ. (United States)
Craig A. Kelly, Johns Hopkins Univ. (United States)
Robert Osiander, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 5354:
Terahertz and Gigahertz Electronics and Photonics III
R. Jennifer Hwu, Editor(s)

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