THz spectroscopy and imaging in security applications

Palka, Norbert; Szustakowski, Mieczyslaw ;  Kowalski, Marcin ;  Trzcinski, Tomasz ;  Ryniec, Radoslaw ;  Piszczek, Marek ;  Ciurapinski, Wieslaw ;  Zyczkowski, Marek ;  Zagrajek, Przemyslaw ;  Wrobel, Janusz

Institute of Optoelectronics, Military University of Technology, Warsaw, Poland  

19th International Conference on Microwave Radar and Wireless Communications (MIKON), 2012 

Volume 1, pages 265-270

ABSTRACT

We compared terahertz transmission spectra of explosives measured by means of Time Domain Spectroscopy (TDS) and an Optical Parametric Oscillator-based system (OPO). Reflection spectra of pure explosives were measured in reflection configuration by means of TDS in the range 0.3–2.5THz. We also analyzed influence of the surface roughness on reflectance and phase spectra of RDX plastic based explosives. Next, we present a thermal phantom of human body working in THz range, which was developed for testing of THz cameras. We demonstrate the possibility of improvement of the quality of the image captured by a commercially available passive THz camera.

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... In our investigations we exploited a commercially available spectrometer TPS 3000 from Teraview -  Fig.1a [9]. The heart of the system is a 800 nm femtosecond Ti:Sapphire laser (a pulse duration  less than 100 fs, repetition rate of 80 MHz, and average power of 300 mW). ...

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