Typical evolution plots of fundamental mode soliton when phase-front curvatures are imposed on it at different positions (a) z_i = 10 and (b) z_i = 18 in the system described by Eqs. (1) and (3); dependence of (c) deviation distance Δ and (d) escape angle α_end on the position z_i for fundamental mode solitons. Other parameters are p = 0.5, Ω = 0.5, μ = 0.1, z₀ = 20, C = 0.5, and U = 2.