Generalized Fokker-Planck equation approach to optical parametric processes II. Photocounting statistics

We study the photocounting statistics of a system of three interacting one-mode boson fields based on results of the recursion procedure of solving the generalized Fokker-Planck equation developed in the first part of this paper. If some simplifications are adopted or losses neglected, we are able to obtain explicit solutions for the photocounting generating function, the photocounting distribution and its factorial moments in terms of the multimode superposition of coherent and chaotic fields, the chaotic component being negative in the anticorrelation state.