(a) The evolution of the MI from a CW input calculated for the normal dispersion with r = 1, s = 1.2, f_AB = 0.53, f_BB = 0.72, δ₁ = 2, P = P₁ + P₂ = 1.5, P₁ = 0.75, P₂ = 0.75, P_1x/P₁ = 0.4, P_1y/P₁ = 0.6, P_2x/P₂ = 0.7, and P_2y/P₂ = 0.3; (b) the waves in the x- and y-polarizations of each mode at ξ = 0 (red line) and ξ = 30 (blue line).