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

Sensors

Stefan Welzel¹  Frank Hempel¹  Marko H࿋ner¹  Norbert Lang¹  Paul B. Davies² 

[1] INP Greifswald, Felix-Hausdorff-Str. 2, 17489 Greifswald, Germany; E-Mails:;Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK; E-Mail:

关键词: quantum cascade laser;    infrared laser;    absorption spectroscopy;    plasma diagnostics;    cavity enhanced spectroscopy;    chemical sensing;   

DOI  :  10.3390/s100706861

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2010 by the authors licensee MDPI, Basel, Switzerland.