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Absorption Spectroscopy of CO2 at 4.3 µm Utilizing an Off-Beam QEPAS Spectrophone and an IR-LED

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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.

© 2013 Optical Society of America

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