Nonlinear localized wave conversions for a higher-order nonlinear Schrodinger-Maxwell-Bloch system with quintic terms in an erbium-doped fiber

摘要

We discuss the possibility of breather-to-soliton conversions for a higher-order nonlinear Schrodinger-Maxwell-Bloch system with quintic terms describing the propagation of ultrashort optical pulses, up to the attosecond duration, in an erbium-doped fiber. The analytic forms for the vector breather solutions of that system with complex (not pure imaginary) eigenvalues are obtained with the Darboux transformation. With the special values of the eigenvalues, we find that vector breather solutions can be converted into the vector soliton solutions on the constant (not zero) backgrounds. The condition for such conversion is explicitly derived. We show the interactions between vector breathers and vector solitons.