Terahertz imaging and spectroscopy for landmine detection

Michael J. Fitch; Dunja Schauki; Craig A. Kelly; Robert Osiander

doi:10.1117/12.530754

8 April 2004 Terahertz imaging and spectroscopy for landmine detection

Michael J. Fitch, Dunja Schauki, Craig A. Kelly, Robert Osiander

Proceedings Volume 5354, Terahertz and Gigahertz Electronics and Photonics III; (2004) https://doi.org/10.1117/12.530754
Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United States

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.

Citation Download Citation

Michael J. Fitch, Dunja Schauki, Craig A. Kelly, and Robert Osiander "Terahertz imaging and spectroscopy for landmine detection", Proc. SPIE 5354, Terahertz and Gigahertz Electronics and Photonics III, (8 April 2004); https://doi.org/10.1117/12.530754

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