【摘要】 对主动锁模光纤激光器的锁相环进行改进,提出一种新型的"变带宽锁相环"的设计结构。变带宽锁相环能够依据信号误差电压实时控制环路的带宽,使环路带宽随锁定信号的频率差动态改变,以达到快速捕捉和锁定信号的目的。M atlab仿真表明:锁相环的捕捉性能和跟踪性能提高,锁模光纤激光器的工作稳定性得到进一步改善。更多还原

【Abstract】 This article presents a new design structure of variable bandwidth phase-locked loop based on improving phase-locked loop of actively mode-locked fiber laser.A variable bandwidth phase-locked loop can hourly control loop bandwidth according to signal error voltage and make loop bandwidth change dynamically with the frequency difference of the locked signals so as to capture and lock signals quickly.Matlab simulation results show this improvement method enhances capture and synchronized performance of phase-locked loop and increases work stability of mode-locked fiber laser.更多还原