Effect of the pump fight fluctuation on the squeezing of resonance fluorescence

The resonance flnoresenoe from a two-level atom driven by a realistic laser field with phase fluctuation is discussed using a phase-diffusion model. It is shown that when phase fluctuation of the pump laser beam inoreses the squeezing effects in the resonance fluorescence decrese, and the region of the sub-Poisson distribution of the field in the homodyne detection of the resonance fluorescence becomes less.