We study the mutual trapping of two dipole-mode light beams in a medium with a nonlocal anisotropic saturable nonlinearity. It is shown that the incoherent attraction of perpendicularly aligned dipole-mode beams leads to the stabilization of their composite structure. Our numerical analysis gives a stationary solution that is stable only with respect to small amplitude modulations. The coupled solitary structure disintegrates in a well-defined way when the numerical perturbations or the experimental propagation length exceeds a certain limit. In this case a new and more robust, multicomponent solitary transverse light structure consisting of two dipole-mode vector solitons will be generated.
© 2002 Optical Society of America
(060.5530) Fiber optics and optical communications : Pulse propagation and temporal solitons
(190.0190) Nonlinear optics : Nonlinear optics
(190.5330) Nonlinear optics : Photorefractive optics
(350.5500) Other areas of optics : Propagation
Marcus Ahles, Kristian Motzek, Andreas Stepken, Friedemann Kaiser, Carsten Weilnau, and Cornelia Denz, "Stabilization and breakup of coupled dipole-mode beams in an anisotropic nonlinear medium," J. Opt. Soc. Am. B 19, 557-562 (2002)