Abstract
This paper investigates a variable-coefficient modified nonlinear Schrodinger model for describing the ultrashort pulse dynamics with the distributed dispersion, self-phase modulation, self-steepening and linear gain/loss. Under specified soliton management conditions, the bright one- and two-soliton solutions are analytically derived by the Hiroa bilinear method. Dynamical behaviors and main features of the ultrashort pulse propagation in inhomogeneous fibers are discussed by analyzing some important physical quantities. Additionally, interactions of two neighboring ultrashort pulses with varying management parameters are investigated in detail. Results obtained in this paper will be of certain value to the studies on the propagation and application of the ultrashort pulse in the dispersion-managed fiber system.
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