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Quantum Cascade Laser Absorption Spectroscopy as a Plasma Diagnostic Tool: An Overview
INP Greifswald, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany
Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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
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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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.
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.
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.