It is demonstrated that optical solitons can propagate in a dispersive (or
diffractive) medium with competing quadratic [i.e.,
χ(2)] and cubic [i.e.,
χ(3)] nonlinearities. Strong
interplay between the nonlinearities leads to novel effects, in particular the
following: (i) stable bright solitons can still exist in a self-defocusing
(owing to cubic nonlinearity) medium supported by quadratic parametric
interactions and (ii) χ(2) nonlinearity can
lead to instabilities of χ(3) solitons.
© 1995 Optical Society of America
Equations on this page are rendered with MathJax. Learn more.