Title :
Mid-infrared quantum cascade laser based trace gas sensor technologies: Recent advances and applications
Author :
Tittel, Frank K. ; Dong, Lei ; Lewicki, R. ; Liu, K. ; Gong, L. ; Griffin, R. ; Spagnolo, V.
Author_Institution :
ECE Dept., Rice Univ., Houston, TX, USA
Abstract :
Recent advances in the development of trace gas sensors based on the use of quantum cascade lasers (QCLs) for the sensitive, selective detection, quantification and monitoring of small molecular gas species with resolved spectroscopic features will be described. High detection sensitivity at ppbv and sub-ppbv concentration levels requires detection sensitivity, enhancement schemes such as multipass absorption cells, cavity enhanced absorption techniques, or quartz enhanced photo-acoustic absorption spectroscopy (QEPAS).
Keywords :
gas sensors; photoacoustic effect; quantum cascade lasers; cavity enhanced absorption; enhancement scheme; high detection sensitivity; midinfrared quantum cascade laser; monitoring; multipass absorption cell; quartz enhanced photoacoustic absorption spectroscopy; selective detection; small molecular gas species; sub-ppbv concentration level; trace gas sensor; Absorption; Atmospheric measurements; Gas detectors; Humans; Monitoring; Quantum cascade lasers; Spectroscopy;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6104813
