Modeling of photon coincidence and dispersive properties of spontaneous parametric down-converted field excited by incoherent source

We present results of characterization of spontaneous down converted radiation excited in the bulk nonlinear crystals by the incoherent, frequency and spatially broadband source. Such properties as down converted wave vectors density in angular-frequencies space, density of biphoton states and photon coincidences are calculated. Obtained results support the idea that incoherent sources can be used as the pump for excitation of acceptable power and quality biphoton field suitable for practical application and that developed code can serve for the optimisation of experiments.