Fig. 1. Lyapunov exponent of equation (2)

Fig. 2. Chaotic attractor (c=0.73)

Fig. 3. Evolution of laser output with time (c=0.73)

Fig. 4. Chaotic attractor (c=−2)

Fig. 5. Evolution of laser output with time (c=−2)

Fig. 6. Evolution curve of semiconductor laser output with time and space

Fig. 7. Maximum Lyapunov exponent of the coupled system

Fig. 8. Error between state variables of two semiconductor lasers 两个半导体激光器状态变量之间的误差

Fig. 9. Error between state variables of two semiconductor lasers 两个半导体激光器状态变量之间的误差

Fig. 10. Error between state variables of two semiconductor lasers 两个半导体激光器状态变量之间的误差

Fig. 11. Multi-channel signal transmission

Fig. 12. Evolution of the maximum Lyapunov exponent of coupled system with coupling strength g_i (i=1, 2, 3, 4)

Fig. 13. Error between the state variables of the coupling system 耦合系统状态变量之间的误差