2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79930Propagation of the extremely short electromagnetic pulse in non-linear dielectric media without the slowly varying envelope approximation is discussed. The models under consideration take into account both resonant and not-resonant excitations of non-linear medium, and polarisation states of electromagnetic wave. Steady state solutions of the relevant equations are presented for certain of these models.LaTex,Submitted to Proceeding of the "Nonlinearity and Disorder: Theory and Applications" (Tashkent, 2-6 October 2000)Pattern Formation and Solitonstext