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Proceedings Paper

Nine wave-length THz spectrum for identification using backward wave oscillator
Author(s): Mo Lv; Hua Zhong; Xin-hao Ge; Ting He; Kaijun Mu; Cun-lin Zhang
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Paper Abstract

The sensing of the explosive is very important for homeland security and defense. We present a nine-wavelength continuous wave (CW) Terahertz (THz) spectroscopy for identification of explosive compounds (2,4-DNT, RDX and TNT) using three Backward Wave Oscillator (BWO) sources, which emit radiations from 0.2 THz to 0.38THz, 0.18THz to 0.26THz and 0.6THz to 0.7THz, respectively. To identify the target materials, only the transmitted THz power through the explosive pellets are measured at the nine discrete wavelengths. A hole, which is the same size as these pellets, is used as references to normalize the transmitted THz power. The measured discrete spectra was successfully identified and classified by using self-organizing map (SOM). These results prove that the backward wave oscillator is a convenient and powerful solution in future development of a standoff THz sensing and identification unit.

Paper Details

Date Published: 19 November 2009
PDF: 8 pages
Proc. SPIE 7512, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Information Security, 75120J (19 November 2009); doi: 10.1117/12.837753
Show Author Affiliations
Mo Lv, Capital Normal Univ. (China)
Hua Zhong, Capital Normal Univ. (China)
Xin-hao Ge, Capital Normal Univ. (China)
Ting He, Capital Normal Univ. (China)
Kaijun Mu, Capital Normal Univ. (China)
Cun-lin Zhang, Capital Normal Univ. (China)


Published in SPIE Proceedings Vol. 7512:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Information Security
Cunlin Zhang; Tiegen Liu, Editor(s)

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