The fluorescence of a single dipole excited by an intense light pulse can l
ead to the generation of another light pulse containing a single photon. Th
e influence of the duration and energy of the excitation pulse on the numbe
r of photons in the fluorescence pulse is studied. The case of a two-level
dipole with strongly damped coherences is considered. The presence of a met
astable stair leading to shelving is also investigated.