Influence of dispersion on photon number distribution over the parametric modes of a synchronously pumped optical parametric oscillator

We describe influence of the group velocity dispersion on the photon number in the eigenmodes of a synchronously pumped optical parametric oscillator. Using the existing model taking into account the influence of quadratic dispersion on the evolution of the parametric modes, we analyze the processes involved in the redistribution of the mean photon number over the output radiation modes. Based on the fourth order perturbative solution for the field amplitude at the resonator output we numerically investigate the processes occurring in the optical oscillator.