2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83324We introduce the concept of two-color multistep cascading for vectorial parametric wave mixing in optical media with quadratic (second-order or chi-2) nonlinear response. We demonstrate that the multistep cascading allows light-guiding-light effects with quadratic spatial solitons. With the help of the so-called `almost exact' analytical solutions, we describe the properties of parametric waveguides created by two-wave quadratic solitons.4 pages, 3 figures (updated references)Pattern Formation and Solitonstext