MULTIDIMENSIONAL SOLITONS IN QUADRATIC NONLINEAR MEDIA

A new type of optical soliton is presented for two-wave interactions i n-quadratic nonlinear media. Unlike the conventional soliton in cubic nonlinear media, the most unique feature of the present solitons is fo und in the feasibility of multidimensional confinement. A compact anal ytical expression for the new solitons with arbitrary transverse dimen sion is derived through the self-consistent-field approximation. With available nonlinear materials in mind, a specific method for observing the multidimensional solitons is investigated.