Optical soliton propagation in erbium-doped fibre with variable dispersion and nonlinear effects

摘要: We propose a coupled system of generalized nonlinear Schrodinger and Maxwell–Bloch equations with variable coefficients which describes propagation an optical soliton in inhomogeneous waveguide doped two-level resonant atoms. The Lax pair this model is derived using the Ablowitz–Kaup–Newell–Segur (AKNS) formalism. one-soliton solution constructed through Darboux–Backlund transformation (BT). found to allow propagation. explain control by effect distributed amplification varying group velocity dispersion, nonlinearity gain or loss parameters.