The development of near-resonant holographic interferometry techniques for use on flows seeded with atomic species is described. A theoretical model for the refractivity that is due to the seed species is outlined, and an approximation to this model is also described that is shown to be valid for practical regimes of interest and allows the number density of the species to be determined without knowledge of line-broadening effects. The details of quantitative number density experiments performed on an air-acetylene flame are given, and a comparison with an alternative absorption-based experiment is made.
© 2004 Optical Society of America
Original Manuscript: November 27, 2003
Revised Manuscript: March 3, 2004
Published: June 10, 2004
Alexis I. Bishop, Timothy J. McIntyre, Bradley N. Littleton, and Halina Rubinsztein-Dunlop, "Near-resonant holographic interferometry and absorption measurements of seeded atomic species in a flame," Appl. Opt. 43, 3391-3400 (2004)