title: VCSEL based detection of water vapor near 940nm.
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.
authors.affiliation: Optics Laboratory, Institute of Physics, Tampere University of Technology, P.O. Box 692, FIN-33101 Tampere, Finland. heidi.cattaneo@tut.fi
authors.forename: Heidi
authors.initials: H
authors.lastname: Cattaneo
authors.forename: Toni
authors.initials: T
authors.lastname: Laurila
authors.forename: Rolf
authors.initials: R
authors.lastname: Hernberg
mesh_terms: D003627:Data Interpretation, Statistical; D007834:Lasers; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods; D013696:Temperature; D014867:Water / Q000032:analysis*
chemical_list: D014867:Water