Emission spectra of atoms strongly driven by finite bandwidth laser light

Assuming a phase diffusion model for the laser light, two-time atomic correlation functions for strongly driven atoms are calculated via the quantum regression theorem. This formalism is applied to the determination of the emission spectrum of a two-level atom for transition to or from a third unperturbed level. In comparison with the purely radiatively damped atom marked modifications of the asymmetry of the doublet are predicted.