Journal
OPTICS EXPRESS
Volume 24, Issue 6, Pages 6425-6432Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.006425
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Funding
- JSPS KAKENHI [25220606]
- Grants-in-Aid for Scientific Research [15J04444, 13F03356] Funding Source: KAKEN
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In 2003, we reported the first-ever development of a spectral imaging system for illicit drugs detection using a terahertz (THz) wave parametric oscillator (TPO) [K. Kawase et al., Opt. Exp. 11(20), 2549 2003]. The system has a dynamic range below four orders of magnitude, which enables it to identify reagents only through thin envelopes using spectral imaging. Recently, we succeeded in developing a high power and high sensitivity THz wave spectral imaging system using injection-seeded THz parametric generation and detection. A dynamic range in excess of 80 dB has been obtained, which is much higher than that of the 2003 system. In this study, the new spectral imaging system successfully identified reagents through thicker material than the thin envelopes used previously. (C) 2016 Optical Society of America
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