Asymmetric partially coherent solitons in saturable nonlinear media

We investigate theoretically properties of partially coherent solitons in o ptical nonlinear media with slow saturable nonlinearity. We have found nume rically that such a medium can support spatial solitons which are asymmetri c in shape and are composed of only a finite number of modes associated wit h the self-induced waveguide. It is shown that these asymmetric spatial sol itons can propagate many diffraction lengths without changes, but that coll isions change their shape and may split them apart. [S1063-651X(99)12808-3] .