The role of birefringence in modulation instability fiber ring resonators

We considered a high birefringence fiber ring cavity, which can be represen ted by a system of two incoherently coupled nonlinear Schrodinger equations with periodic boundary conditions. The stability of the system against tim e domain periodic perturbations could be strongly conditioned by fiber bire fringence. We apply both a perturbative approach and a mean field approxima tion, in order to highlight the dependence of modulation instability on bir efringence and ring detuning. We extend the study of the dynamical properti es of the system by means of a phase matching interpretation and a selectio n of numerical solutions of the governing equations.