Abstract
The dynamics of an ultrashort optical pulse in order—disorder ferroelectrics in the presence of defects without limitations on the pulse power is considered in the framework of the microscopic pseudospin formalism within the unidirectional propagation approximation. The effective equations for the electric field amplitude and the ferroelectric polarization are derived and numerically solved. Quasi-soliton modes of propagation of ultrashort optical pulses are revealed, and the dependences on the microscopic Hamiltonian parameters are analyzed. The influence of defects of different types on the propagation of ultrashort pulses is established.
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