Fig. 1. Structure diagram of fiber laser active polarization control system

Fig. 2. Flow chart of GASA algorithm

Fig. 3. Convergence curves for different fitness functions

Fig. 4. Convergence curves of fitness function for N=20, 50, 60, 70, 80, 100. (a) Convergence curves of fitness function with iteration number; (b) value of fitness function at the last step

Fig. 5. Convergence curves of fitness function for P_e=0.4, 0.6, 0.7, 0.8, 0.9. (a) Convergence curves of fitness function with iteration number; (b) value of fitness function at the step of 90 to 100

Fig. 6. Convergence curves of fitness function for P_m=0.0001, 0.001, 0.01, 0.1, 0.2. (a) Convergence curves of fitness function with iteration number; (b) value of fitness function at the step of 90 to 100

Fig. 7. Convergence curves of the fitness function for P_t=0.99,0.97,0.95,0.93,0.91

Fig. 8. Convergence curves of evaluation function of SPGD algorithm for δu=0.02, 0.04, 0.06, 0.08, 0.10

Fig. 9. Convergence curves of evaluation function of SPGD algorithm for δu=0.08 and r=10, 15, 20, 25, 30

Fig. 10. Convergence curves of evaluation function of SPGD algorithm for δu=0.10 and r=10, 15, 20, 25, 30

Fig. 11. Change curves of each variable during the iteration. (a) Phase change curves of delay amounts (δ₁,δ₂,δ₃); (b) change curves of output light θ and φ