title: OH concentration and temperature measurements by use of near-resonant holographic interferometry.
abstract: Near-resonant holographic interferometry is demonstrated to measure temperature and species concentration in a two-dimensional steady premixed air-acetylene flame. A peak temperature of (2600 +/- 100) K and a peak OH number density of (9.6 +/- 0.3) x 10(22) m(-3) are obtained, consistent with the expected values for such a flame. These values are determined by recording interferograms with a laser assumed sufficiently detuned from line center so that pressure and temperature broadening can be ignored. The results are thus obtained without making prior assumptions on the temperature or pressure of the flame beyond the existence of thermal equilibrium.
authors.affiliation: Department of Physics, The University of Queensland, Brisbane 4072, Australia.
authors.forename: Alexis I
authors.initials: AI
authors.lastname: Bishop
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: McIntyre
authors.forename: Bradley N
authors.initials: BN
authors.lastname: Littleton
authors.forename: Halina
authors.initials: H
authors.lastname: Rubinsztein-Dunlop