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Proceedings Paper

Terahertz spectra of materials measured by the OPO-based system
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Paper Abstract

We report on measurements of transmission spectra of chosen materials (Hexogen, sugar, L-tartaric acid, 4-aminobenzoic acid) in the range 0.7-2.0 THz. The measurements were carried out by means of a setup, which bases on the optical parametric oscillator (OPO) combined with the hot electron bolometer (HEB). The setup consists of the commercially available tunable OPO working in the range 0.7-2.0 THz with repetition rate 53 Hz, duration of the impulse of about 20ns and energy 10nJ. The beam was detected by the fast and sensitive HEB. The spectra were compared to results obtained from a standard time domain spectroscopy (TDS) setup. Only small discrepancies between spectra measured by both methods are observed. For the range 0.7-2.0 THz typical features can be identified using both methods. Above 2 THz the TDS setup seems to have better performance in terms of signal-to-noise ratio and sensitivity.

Paper Details

Date Published: 31 May 2013
PDF: 7 pages
Proc. SPIE 8716, Terahertz Physics, Devices, and Systems VII: Advanced Applications in Industry and Defense, 87160Y (31 May 2013); doi: 10.1117/12.2015375
Show Author Affiliations
Michał J. Walczakowski, Military Univ. of Technology (Poland)
Norbert Palka, Military Univ. of Technology (Poland)
Przemyslaw Zagrajek, Military Univ. of Technology (Poland)
Mieczyslaw Szustakowski, Military Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 8716:
Terahertz Physics, Devices, and Systems VII: Advanced Applications in Industry and Defense
Mehdi F. Anwar; Thomas W. Crowe; Tariq Manzur, Editor(s)

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