Modulation Instability of Non-paraxial Beams for Self-Focusing Kerr Media

摘要

Propagation stability of non-paraxial beam in nonlinear Kerr media is investigated with a linear stability method. Both theoretical analysis and numerical simulation show that modulation instability(MI) gain spectrum has three different distribution features determined by the times of incident power p 0 and the non-paraxial parameter a. Furthermore, the corresponding criterion is put forward to distinguish the three different distributions.