Abstract

Using a three dimensional (3D) variational analysis, we show the existence, in a nonlinear slab directional coupler (NLDC), of multidimensional symmetric bisoliton states (MSBS), previously obtained only in the framework of coupled mode theory (CMT), where the original 3D problem is converted into a 2D one.^1,2 We then study MSBS stability, finding three power-dependent regimes: stable, unstable below collapse and unstable above collapse. The power dependent stability could be exploited in achieving all-optical-switching. Numerical integration is used to validate the analysis.

© 1994 Optical Society of America