An analytic approach to describe subpicosecond soliton dynamics is presented. It is argued that the modified
nonlinear Schrödinger (NLS) equation containing a nonlinearity dispersion term should be considered as a true
basic integrable model in the subpicosecond region, instead of a perturbed NLS equation. Unique features to
improve performance characteristics of optical systems in the subpicosecond region by matching properly soliton and medium parameters are illustrated by several examples, among which are dispersion-managed solitons and solitons in a nonlocal Kerr medium.