High-intensity localized structures in the degenerate optical parametric oscillator: Comparison between the propagation and the mean-field models - art. no. 043806

The degenerate optical parametric oscillator may generate very high-intensi ty two-dimensional localized structures. A quantitative comparison of the p ropagation and the mean-field models is presented for different mistunings, corresponding to monostable and bistable homogeneous solutions. In both mo dels, we study the circular domain walls as an example of localized structu res. The peak intensities are comparable; the difference lies mainly in the ir domain of existence as a function of the pump amplitude parameter.