论文部分内容阅读
基于自旋反转模型(SFM),对光电负反馈下单向耦合注入垂直腔表面发射激光器(VCSEL)的混沌同步特性进行了数值仿真和理论分析.研究结果表明:随着反馈强度的增加,激光器输出功率呈现两个不同的混沌区域.在单一偏振模区域,能实现很好的同步性,但接近两模共存时,同步质量急剧下降;在两模共存区域,偏振模的连续性差,同步质量不理想.两模共存时的同步质量比单一偏振模差的这一特性,与已报道的基于光反馈的情景相反.产生这一特殊现象的原因是光电负反馈诱发了偏振模竞争效应.此外,还发现内部参数的变化对两个混沌区域的选取有较大影响.
Based on the spin-inversion model (SFM), the chaotic synchronization characteristics of one-way coupled vertical-cavity surface-emitting lasers (VCSELs) with photodetector negative feedback are numerically simulated and theoretically analyzed. The results show that with the increase of the feedback intensity, The output power of the laser presents two different chaos regions, and the synchronization quality can be well synchronized in a single polarization mode region, but the synchronization quality decreases sharply when the two modes coexist. In the co-existence region of two modes, the polarization mode continuity is poor, The quality is not ideal.When the two modes coexist, the quality of synchronization is worse than that of single polarization mode, which is contrary to the reported situation based on optical feedback.The reason for this special phenomenon is that polarization induced by the photoelectric negative feedback induces the polarization mode competition effect. In addition, it is also found that the change of internal parameters has a great influence on the selection of two chaotic regions.