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Proceedings Paper

Handheld terahertz spectrometer for the detection of liquid explosives
Author(s): N. Krumbholz; C. Jansen; M. Scheller; T. Müller-Wirts; S. Lübbecke; R. Holzwarth; R. Scheunemann; R. Wilk; B. Sartorius; H. Roehle; D. Stanze; J. Beckmann; L. S. von Chrzanowski; U. Ewert; M. Koch
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Paper Abstract

We present a handheld fiber-coupled terahertz spectrometer operating at a center wavelength of 1550 nm. The key elements are a fs-fiber laser, a fiber stretcher delay line and fiber-coupled antennas, which contain novel InAlAs-InGaAs multi layer chips. First experimental data obtained with this system demonstrates its great potential and robustness. In addition, we investigate different hazardous and harmless liquids in reflection geometry. These experiments show that liquids are in principle distinguishable by terahertz spectroscopy. Finally, first steps towards an algorithm that allows for an extraction of the liquids dielectric properties are discussed. The algorithm works for the analysis of reflection data even if the liquid is located inside a container.

Paper Details

Date Published: 17 September 2009
PDF: 12 pages
Proc. SPIE 7485, Millimetre Wave and Terahertz Sensors and Technology II, 748504 (17 September 2009); doi: 10.1117/12.830381
Show Author Affiliations
N. Krumbholz, Technische Univ. Braunschweig (Germany)
C. Jansen, Technische Univ. Braunschweig (Germany)
M. Scheller, Technische Univ. Braunschweig (Germany)
T. Müller-Wirts, TEM Messtechnik GmbH (Germany)
S. Lübbecke, TEM Messtechnik GmbH (Germany)
R. Holzwarth, Menlo Systems GmbH (Germany)
R. Scheunemann, Menlo Systems GmbH (Germany)
R. Wilk, Menlo Systems GmbH (Germany)
B. Sartorius, Fraunhofer-Institut für Nachrichtentechnik Heinrich-Hertz-Institut (Germany)
H. Roehle, Fraunhofer-Institut für Nachrichtentechnik Heinrich-Hertz-Institut (Germany)
D. Stanze, Fraunhofer-Institut für Nachrichtentechnik Heinrich-Hertz-Institut (Germany)
J. Beckmann, Bundesanstalt für Materialforschung und -prüfung (Germany)
L. S. von Chrzanowski, Bundesanstalt für Materialforschung und -prüfung (Germany)
U. Ewert, Bundesanstalt für Materialforschung und -prüfung (Germany)
M. Koch, Univ. of Marburg (Germany)


Published in SPIE Proceedings Vol. 7485:
Millimetre Wave and Terahertz Sensors and Technology II
Keith A. Krapels; Neil A. Salmon, Editor(s)

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