Title :
Absorption Spectroscopy of CO2 at 4.3 μm utilizing an off-beam QEPAS spectrophone and an IR-LED
Author :
Bottger, Stefan ; Willer, Ulrike ; Schade, Wolfgang
Author_Institution :
Fraunhofer Heinrich Hertz Inst., Goslar, Germany
Abstract :
An IR-LED at 4.3 μm and an off-beam QEPAS spectrophone as optical detector are utilized for absorption spectroscopy. With an absorption path of 5 cm a detection limit of 150 ppm is achieved for carbon dioxide.
Keywords :
carbon compounds; gas sensors; infrared spectra; light emitting diodes; optical sensors; photoacoustic spectra; spectrochemical analysis; CO2; IR-LED; absorption path; absorption spectroscopy; carbon dioxide; detection limit; off-beam QEPAS spectrophone; optical detector; quartz-enhanced photoacoustic spectroscopy; wavelength 4.3 mum; Absorption; Helium; Light emitting diodes; Light sources; Resonant frequency; Sensors; Spectroscopy;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2013 Conference on
Conference_Location :
San Jose, CA
