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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。
The optical delay-feedback space-coupled semiconductor laser system is proposed. The enhancement and control of the oscillation frequency of the space-coupled two lasers under the optical delay feedback condition are studied. The detuning formula of the stable frequency is given. The results show that the chaotic oscillation frequency of a laser is obviously enhanced by 3.57 times with the feedback level increasing under the condition of high level feedback, and the chaotic oscillation frequency of the other laser can be increased by 2.86 Times; For the chaos control window, that is under low level feedback conditions, the two lasers can be controlled to a single cycle, double cycle, three cycles and so on. When both lasers have optical feedback, the chaotic oscillation frequencies of the two lasers can be further increased by more than 3 times and 2.58 times, respectively, with the feedback degree increasing. A window of double laser optical feedback control chaos is also found, that is, Under low light feedback conditions, both lasers can be controlled to single, double, triple, and so on. A single laser optical feedback system and a dual laser feedback system from the single-cycle mode lock to the class cycle and then enter the chaotic frequency increase of the development path is also given in detail.