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  • Title: VCSEL based detection of water vapor near 940nm.
    Author: Cattaneo H, Laurila T, Hernberg R.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2004 Dec; 60(14):3269-75. PubMed ID: 15561608.
    Abstract:
    A vertical-cavity surface-emitting laser (VCSEL) was used to study the absorption spectrum of water vapor in the 940nm region. Measurements were performed in ambient air at room temperature and in a hydrogen-oxygen flame over the temperature range of 1500-1800K. Several rotational absorption lines within the 2v1 + v3 vibrational band were measured. The absorption spectra were well resolved, which demonstrates the feasibility of VCSEL-based spectroscopic measurements of water vapor at room and high-temperature in this spectral region. The results were in good agreement with the values obtained from the HITRAN-96 database.
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