In a propagation treatment at all orders in the pump field and to first order in the probe and signal fields, for a homogeneously broadened line, we obtain three approximation levels for the Rayleigh-type optical mixing signal intensity: the first level is an analytical solution valid only for constant pump intensity; the analytical solution corresponding to the second approximation level considers pump propagation and yields good results for a large number of cases; the third level is an exact but numerical solution. We present and compare the results obtained with the different approximations.
© 1991 Optical Society of America
I. Reif, F. García-Golding, J. L. Paz, and H. J. Franco, "Three levels of approximation in the study of the propagation of the Rayleigh-type optical mixing signal," J. Opt. Soc. Am. B 8, 2470-2476 (1991)