延迟光反馈VCSEL的混沌动力学特性

根据延迟光反馈垂直腔面发射半导体激光器动力学模型,数值模拟了激光器的混沌动力学特性,分析了外腔长度和光反馈强度对激光器混沌动力学特性的影响.结果表明:外腔较短的激光器,经过混沌区后仍会回到锁频状态|外腔较长的激光器,经过混沌区后不是进入锁频状态而是回到周期1.取定激光器外腔长度为3.0 cm,使反馈强度由小增大,得到激光器由倍周期分岔进入混沌的过程,并在混沌区中出现周期12窗口.本文对混沌保密通信的实际应用具有一定的理论参考价值.

Chaotic Dynamic Behaviors of Vertical Cavity SurfaceEmitting Laser with Delayed Optical Feedback

According to the dynamic model of Vertical Cavity Surface Emitting Laser(VCSEL) with delay optical feedback,its chaotic dynamic behaviors were discussed by numerical simulation.And the influence of the external cavity length and optical feedback strength on the dynamic was analyzed.The results show that laser with short external cavity will come back to frequency-locked state after chaos.Laser with long external cavity will come back to period 1 instead of the locked state after chaos.When the external cavity is 3.0 cm,with optical feedback strength increasing,laser turns into chaos by bifurcation,and it can also get period 12 window in chaos.The research results have some theoretical reference value on practical applications.