Rc. Hart et al., OBSERVATION OF H2O IN A FLAME BY 2-COLOR LASER-INDUCED-GRATING SPECTROSCOPY, Measurement science & technology, 8(8), 1997, pp. 917-920
By using two-colour laser-induced-grating spectroscopy (TC-LIGS), we o
bserved the third-overtone spectrum of the O-H stretch of water vapour
at a point in a stoichiometric CH4-air flame. We also demonstrated th
e extension of these point measurements to a line image in a flame. On
ly thermal gratings could be observed. The reasons for this and the di
fficulties in making a practical combustion diagnostic are discussed.