Chaos and Chaos synchronization of semiconductor lasers with optoelectronic feedback and bidirectional couplings

摘要

Chaos and chaotic synchronization of semiconductor lasers with optoelectronic feedback and bidirectional couplings have been investigated theoretically. The results show that chaos and chaotic synchronization of two lasers are realized by two schemes which are difference coupled and sum-coupled, and the effects of synchronization are both very good, but sum-coupled is easier. Taking coupling constant k and nonlinear gain ε into account, the influence of their variation on chaos and chaotic synchronization are analyzed, two lasers can achieve good synchronization with small tolerance of parameter mismatch, but the robustness and stability of difference coupled is better than sum coupled.