The influence of the laser fluctuations on resonance fluorescence is treated exactly within the framework of multiplicative stochastic processes. For the phase diffusion model of the laser, I find that, in the limit of strong fields, the ratios of the width and height of the central peak to the side peak are, respectively,
3x2 and
3x, where $x=\frac{(\ensuremath{\gamma}+{\ensuremath{\gamma}}_{c})}{(\ensuremath{\gamma}+2{\ensuremath{\gamma}}_{c})}$. The envelope of the intensity correlations is found to decay at the rate $\frac{(3\ensuremath{\gamma}+{\ensuremath{\gamma}}_{c})}{2}$.