Abstract

Much interest has been devoted recently to the formation of extended (patterns)¹ and localized² spatial structures in degenerate parametric downconversion in a cavity. In particular, robust solitonlike stripes have been predicted in the signal field of degenerate optical parametric oscillators (DOPOs).² These stripes correspond to diffractive domain walls separating signal fields of opposite phases. It was suggested that one-dimensional domain walls can also be stable in two transverse dimensions, and evidence was presented via numerical simulations on a square grid with Neumann boundary conditions.²

© 1998 Optical Society of America