Sensors 2010, 10(7), 6861-6900; doi:10.3390/s100706861
Review

Quantum Cascade Laser Absorption Spectroscopy as a Plasma Diagnostic Tool: An Overview

Stefan Welzel 1,3,* email, Frank Hempel 1 email, Marko Hübner 1 email, Norbert Lang 1 email, Paul B. Davies 2 email and Jürgen Röpcke 1 email
1 INP Greifswald, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany 2 Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK 3 Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
* Author to whom correspondence should be addressed.
Received: 8 June 2010; in revised form: 25 June 2010 / Accepted: 10 July 2010 / Published: 16 July 2010
(This article belongs to the Special Issue Laser Spectroscopy and Sensing)
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Abstract: The recent availability of thermoelectrically cooled pulsed and continuous wave quantum and inter-band cascade lasers in the mid-infrared spectral region has led to significant improvements and new developments in chemical sensing techniques using in-situ laser absorption spectroscopy for plasma diagnostic purposes. The aim of this article is therefore two-fold: (i) to summarize the challenges which arise in the application of quantum cascade lasers in such environments, and, (ii) to provide an overview of recent spectroscopic results (encompassing cavity enhanced methods) obtained in different kinds of plasma used in both research and industry.
Keywords: quantum cascade laser; infrared laser; absorption spectroscopy; plasma diagnostics; cavity enhanced spectroscopy; chemical sensing

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MDPI and ACS Style

Welzel, S.; Hempel, F.; Hübner, M.; Lang, N.; Davies, P.B.; Röpcke, J. Quantum Cascade Laser Absorption Spectroscopy as a Plasma Diagnostic Tool: An Overview. Sensors 2010, 10, 6861-6900.

AMA Style

Welzel S, Hempel F, Hübner M, Lang N, Davies PB, Röpcke J. Quantum Cascade Laser Absorption Spectroscopy as a Plasma Diagnostic Tool: An Overview. Sensors. 2010; 10(7):6861-6900.

Chicago/Turabian Style

Welzel, Stefan; Hempel, Frank; Hübner, Marko; Lang, Norbert; Davies, Paul B.; Röpcke, Jürgen. 2010. "Quantum Cascade Laser Absorption Spectroscopy as a Plasma Diagnostic Tool: An Overview." Sensors 10, no. 7: 6861-6900.

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