Joint probability distributions of stimulated parametric down-conversion for controllable nonclassical fluctuations

We derive and illustrate multimode joint photon-number distributions, integrated-intensity distributions, sum- and difference-distributions and conditional distributions for stimulated parametric down-conversion on the basis of exact formulae. The stimulated process can increase or decrease nonclassical fluctuations from spontaneous process and it can be used to control quantum noise. The description is suitable for interpretation of experimental data.