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Proceedings Article

Handheld terahertz spectrometer for the detection of liquid explosives

[+] Author Affiliations
N. Krumbholz, C. Jansen, M. Scheller

Technische Univ. Braunschweig (Germany)

T. Müller-Wirts, S. Lübbecke

TEM Messtechnik GmbH (Germany)

R. Holzwarth, R. Scheunemann, R. Wilk

Menlo Systems GmbH (Germany)

B. Sartorius, H. Roehle, D. Stanze

Fraunhofer-Institut für Nachrichtentechnik Heinrich-Hertz-Institut (Germany)

J. Beckmann, L. S. von Chrzanowski, U. Ewert

Bundesanstalt für Materialforschung und -prüfung (Germany)

M. Koch

Univ. of Marburg (Germany)

Proc. SPIE 7485, Millimetre Wave and Terahertz Sensors and Technology II, 748504 (September 17, 2009); doi:10.1117/12.830381
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From Conference Volume 7485

  • Millimetre Wave and Terahertz Sensors and Technology II
  • Keith A. Krapels; Neil A. Salmon
  • Berlin, Germany | August 31, 2009

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.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

N. Krumbholz ; C. Jansen ; M. Scheller ; T. Müller-Wirts ; S. Lübbecke, et al.
"Handheld terahertz spectrometer for the detection of liquid explosives", Proc. SPIE 7485, Millimetre Wave and Terahertz Sensors and Technology II, 748504 (September 17, 2009); doi:10.1117/12.830381; http://dx.doi.org/10.1117/12.830381


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