Spectral Resolution of Near-Resonant Rayleigh Scattering and Collision-Induced Resonance Fluorescence

Light scattered from strontium vapor near its 460.73-nm (${}_{}{}^1{}_{}{}^{}{P}_1_{}^{\circ }{}_{}{}^{}-{}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}$) resonance transition was resolved into its three spectral components: Rayleigh scattering, collision-induced fluorescence, and three-photon scattering. The saturation behavior of the central (Rayleigh) component and the intensity and ac Stark shift of the three-photon component were studied as a function of detuning and laser intensity. Good agreement is obtained with theoretical predictions.