Interactions between M-typed dark solitons in nonlinear optics

Abstract Solitons are used in such field as nonlinear optics. In this manuscript, interactions between M-typed dark solitons are investigated analytically in the decreasing dispersion fiber. With symbolic computation, interactions between them are simulated via the analytic two-soliton solution. Relevant interaction characteristics of them are analyzed. Method of weakening soliton interaction is suggested.