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2015
Conference Paper
Titel

Widely tuneable quantum cascade lasers for spectroscopic sensing

Abstract
In this paper recent advances in broadband-tuneable mid-infrared (MIR) external-cavity quantum cascade lasers (EC-QCL) technology are reported as well as their use in spectroscopic process analysis and imaging stand-off detection of hazardous substances, such as explosive and related precursors. First results are presented on rapid scan EC-QCL, employing a custom-made MOEMS scanning grating in Littrow-configuration as wavelength-selective optical feedback element. This way, a scanning rate of 1 kHz was achieved, which corresponds to 2000 full wavelength scans per second. Furthermore, exemplary case studies of EC-QCL based MIR spectroscopy will be presented. These include time resolved analysis of catalytic reactions in chemical process control, as well as imaging backscattering spectroscopy for the detection of residues of explosives and related precursors in a relevant environment.
Author(s)
Boskovic, D.
Fraunhofer-Institut fĂ¼r Angewandte Festkörperphysik IAF
Fuchs, F.
Fraunhofer-Institut fĂ¼r Angewandte Festkörperphysik IAF
Grahmann, Jan
Fraunhofer-Institut fĂ¼r Photonische Mikrosysteme IPMS
Hugger, S.
Fraunhofer-Institut fĂ¼r Photonische Mikrosysteme IPMS
Jarvis, J.P.
Fraunhofer-Institut fĂ¼r Angewandte Festkörperphysik IAF
Merten, André
Fraunhofer-Institut fĂ¼r Angewandte Festkörperphysik IAF
Ostendorf, R.
Fraunhofer-Institut fĂ¼r Angewandte Festkörperphysik IAF
Schenk, Harald
Fraunhofer-Institut fĂ¼r Chemische Technologie ICT
Wagner, J.
Fraunhofer-Institut fĂ¼r Photonische Mikrosysteme IPMS
Hauptwerk
Quantum Sensing and Nanophotonic Devices XII. Proceedings
Konferenz
Conference "Quantum Sensing and Nanophotonic Devices" 2015
Thumbnail Image
DOI
10.1117/12.2082794
Language
English
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Fraunhofer-Institut fĂ¼r Angewandte Festkörperphysik IAF
Fraunhofer-Institut fĂ¼r Chemische Technologie ICT
Fraunhofer-Institut fĂ¼r Photonische Mikrosysteme IPMS
Tags
  • tunable infrared lase...

  • quantum cascade laser...

  • external cavity laser...

  • standoff detection

  • active hyperspectral ...

  • spectroscopic process...

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