2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/15734We show that an integro-differential equation model for pulse propagation in optical transmission lines with dispersion management, is integrable at the {\it leading nonlinear order}. This equation can be transformed into the nonlinear Schroedinger equation by a near-identity canonical transformation for the case of weak dispersion. We also derive the next order (nonintegrable) correction.Chaotic Dynamicstext