Nonlinear pulse transmission through an optical fiber at zero-average group velocity dispersion

In nonlinear pulse propagation through a cascaded optical fiber with zero-average group velocity dispersion, it is shown that in the steady state a nontransform-limited (chirped) pulse may propagate at a wavelength that is slightly shifted into the anomalous dispersion region. The quasi-steady-state chirped pulse is generated by balancing the chirp in the anomalous region that accompanies the nonlinear phase change with that in the normal region. This mechanism is similar to the dispersion allocated soliton and the stretched pulse mode-locking techniques.