Abstract
Detection of carbon monoxide (CO) in combustion gases by tunable diode laser spectrometry is often hampered by spectral interferences from and . A methodology for assessment of CO in hot, humid media using telecommunication distributed feedback lasers is presented. By addressing the R14 line at , and by using a dual-species-fitting technique that incorporates the fitting of both a previously measured water background reference spectrum and a -wavelength modulation lineshape function, percent-level concentrations of CO can be detected in media with tens of percent of water () at with an accuracy of a few percent by the use of a single reference water spectrum for background correction.
© 2011 Optical Society of America
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