摘要
提出了光延时反馈空间耦合半导体激光系统,研究空间耦合两激光器在光延时反馈条件下混沌的振荡频率增强与控制,给出了稳定频率失谐公式。研究表明:当单激光延时反馈时,在高水平反馈条件下,随着反馈水平的进一步增加,一个激光器混沌振荡频率增强效果明显,可达到3.57倍,另一个激光器混沌振荡频率增强可达到2.86倍;对于混沌控制窗口,即在低水平反馈条件下,两激光器可被控制到单周期、双周期、三周期等。当双激光器都有光反馈时,随着反馈程度的增加,两激光器混沌振荡频率可被进一步增强且可分别达到3倍和2.58倍以上;双激光器光反馈控制混沌的一个窗口也被发现,即在弱光反馈条件下,两激光器可被控制到单周期、双周期、三周期等。对于单个激光器光反馈系统以及双激光反馈系统从单周期模式锁定到类周期再进入混沌增频的发展路径等也给出了详细阐述。
A novel system of chaotic oscillation frequency enhancement and control of chaos in two spatial coupled semiconductor lasers due to optical feedback is presented. Characteristic of chaotic frequency enhancement and control of chaos in the lasers are studied and a static frequency detuning formula is given. For the case of single-laser feedback, chaotic enhancements are effectively achieved when the feedback is at high levels, in which, the strong feedback can result obviously in frequency enhancement in the dual-lasers while the frequency can be enlarged to 3.57 times of the intrinsic frequency of one laser and 2.86 times for the other. Chaos-control region is found in low feedback levels. In this region, dual-lasers can be conduced to single-cycle, dual-cycle and triple-cycle. The frequency can be enlarged to 3 times of the intrinsic frequency of one laser and 2.58 times for the other when the dual-lasers are with the feedback. Chaos-control region is also found in low feedback levels, and dual-lasers can be controlled to single-cycle, dual-cycle and triple-cycle. The developing path from single-cycle locking to quasi-cycle and then to chaotic frequency enhancement is put forward in detail when the single-feedback or the dual-feedback is present.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2013年第3期11-17,共7页
Chinese Journal of Lasers
关键词
激光器
混沌
控制
频率增强
空间耦合半导体激光器
光反馈
lasers
chaos
control
frequency enhancement
spatial coupled semiconductor lasers
optical feedback
