Optical sequence generation based on collision avoidance using chaotic mode transitions

An adaptive optical sequence generation scheme has been described in a nonlinear optical ring which exhibits chaotic dynamics. The adaptation is based on avoidance of collisions between the ring output and signals from another source. It is shown that collision-avoiding sequences can be autonomously selected via chaotic mode transitions induced by the feedback of collision signals. Experimental results demonstrate that the method can be successful for various collition signal patterns with different periods and pulsewidths. The mechanism of inducing chaos with collision signal is examined both experimentally and with numerical simulations and the results verify the effective-ness of the proposed adaptation method. A possible application of the proposed signal generation scheme in intelligent optical communication networks is mentioned.