Pulse Instabilities In Molecular Amplifying Media

At high laser field intensities, mixing of many levels in molecules occurs as a result of the delocalization of the eigenstates of the molecule-field system, over the unperturbed states. These new states are called dressed states. A measure of this mixing or delocalization is shown here by calculating the dressed states for certain analytical models. Pulse propagation is examined for these model cases in order to examine the validity of the two-level approximation for which soliton propagation is known to occur.