Measurements of benzene concentration by difference-frequency laser absorption spectroscopy

Measurements of benzene concentration based on high-resolution laser absorption spectroscopy by use of the R(6) transition in the nu(4) fundamental vibrational band near 14.8 mum (676.6 cm(-1)) are reported. These measurements were performed with a tunable continuous-wave, mid-infrared spectroscopic...

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Bibliographic Details
Published in:Applied optics (2004) 2000-11, Vol.39 (33), p.6238-6242
Main Authors: Chen, W, Cazier, F, Tittel, F, Boucher, D
Format: Article
Language:English
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Summary:Measurements of benzene concentration based on high-resolution laser absorption spectroscopy by use of the R(6) transition in the nu(4) fundamental vibrational band near 14.8 mum (676.6 cm(-1)) are reported. These measurements were performed with a tunable continuous-wave, mid-infrared spectroscopic light source that employs difference-frequency mixing of two Ti:sapphire lasers in a GaSe nonlinear optical crystal. A minimum benzene concentration detection of ~11.5 parts in 10(6) was realized at a reduced pressure of 40 mbars.
ISSN:1559-128X
DOI:10.1364/AO.39.006238