Title :
Sulfur dioxide detection using 7.4 μm DFB-QCL based cavity enhanced absorption spectroscopy
Author :
Tarka, J. ; Stefanski, P. ; Lewicki, R. ; So, S. ; Jahjah, M. ; Tittel, Frank K.
Author_Institution :
Electr. & Comput. Eng. Dept., Rice Univ., Houston, TX, USA
Abstract :
A quantitative measurements of sulfur dioxide using CW, RT DFB-QCL based cavity-enhanced absorption spectroscopy and 2f wavelength modulation detection technique will be reported. Detection limits of 130ppbv (1σ) were achieved with a 0.4-sec averaging time.
Keywords :
distributed feedback lasers; measurement by laser beam; modulation spectroscopy; quantum cascade lasers; spectrochemical analysis; sulphur compounds; 2f wavelength modulation detection; DFB-QCL; SO2; cavity enhanced absorption spectroscopy; sulfur dioxide detection; wavelength 7.4 mum; Absorption; Laser beams; Optical sensors; Quantum cascade lasers; Spectroscopy; Temperature sensors;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2013 Conference on
Conference_Location :
San Jose, CA
