Quadratic Solitons in Non Collinear Quasi-Phase Matched Geometry

A. Pasquazi and G. Assanto

Phys. Rev. A 80, 021801 (2009)


We investigate optical spatial solitons in a two-dimensional quasi-phase matched geometry involving two concurrent noncollinear quadratic processes. The model, formally equivalent to that ruling second-harmonic generation in the presence of a 1D transverse nonlinear grating, supports a class of simultons with a large domain of stability. We also identify a regime where the general equations predict walking solitary waves