图 1  方程(2)的Lyapunov指数

Figure 1.  Lyapunov exponent of equation (2)

图 2  混沌吸引子(c=0.73)

Figure 2.  chaotic attractor (c=0.73)

图 3  激光输出随时间的演化(c=0.73)

Figure 3.  evolution of laser output with time (c=0.73)

图 4  混沌吸引子(c=−2)

Figure 4.  chaotic attractor (c=−2)

图 5  激光输出随时间的演化(c=−2)

Figure 5.  evolution of laser output with time (c=−2)

图 6  半导体激光器输出随时空演化曲线

Figure 6.  evolution curve of semiconductor laser output with time and space

图 7  耦合系统的最大Lyapunov指数

Figure 7.  maximum Lyapunov exponent of the coupled system

图 8  两个半导体激光器状态变量之间的误差$ {e_1}(r,t) $

Figure 8.  error $ {e_1}(r,t) $ between state variables of two semiconductor lasers

图 9  两个半导体激光器状态变量之间的误差$ {e_2}(r,t) $

Figure 9.  error$ {e_2}(r,t) $between state variables of two semiconductor lasers

图 10  两个半导体激光器状态变量之间的误差$ {e_3}(r,t) $

Figure 10.  error$ {e_3}(r,t) $between state variables of two semiconductor lasers

图 11  多通道信号传输

Figure 11.  multi channel signal transmission

图 12  耦合系统的最大Lyapunov指数随耦合强度g_i (i=1, 2, 3, 4)的演化

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

图 13  耦合系统状态变量之间的误差${e_{ij}}(r,t)(i = 1,2,3,4\;\;j = 1,2,3)$

Figure 13.  error ${e_{ij}}(r,t)(i = 1,2,3,4\;\;j = 1,2,3)$between the state variables of the coupling system