C. Etrich et al., SHORT-TERM STABILITY OF PATTERNS IN INTRACAVITY VECTORIAL 2ND-HARMONIC GENERATION, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 58(3), 1998, pp. 4005-4008
We examine how patterns develop from the point where the plane wave mo
dulational instability sets in. In particular, it is found that in a c
ertain domain of parameter space square patterns bifurcate stably from
this point.