Optimization of Timing Jitter Reduction by Optical Feedback for a Passively Mode-Locked Laser
Optimization of Timing Jitter Reduction by Optical Feedback for a Passively Mode-Locked Laser
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DOI：
10.1109/jphot.2014.2352934
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发表时间：
2014-08
影响因子：
2.4
通讯作者：
C. Otto;L. Jaurigue;E. Scholl;K. Ludge
中科院分区：
文献类型：
--
作者：
C. Otto;L. Jaurigue;E. Scholl;K. Ludge
本文研究了光反馈对被动锁模激光器定时抖动的影响，并比较了计算这种系统定时抖动的von Linde方法和两种纯时域方法。我们发现，所有三种方法产生相同的依赖性的定时抖动的外部腔往返时间（延迟时间）。在这些方法中，所谓的长期抖动方法在计算上明显更便宜。因此，我们使用这种方法来研究延迟时间，反馈强度，和幅相耦合的定时抖动的影响。我们的研究结果表明，与消失的幅相耦合，更大的定时抖动减少可以实现与长延迟时间和更大的反馈强度，当反馈是近共振。非谐振时，定时抖动增加。非零的幅相耦合会导致脉冲流的不稳定，即使在反馈主共振处也是如此。
We investigate the effect of optical self-feedback on the timing jitter of a passively mode-locked (ML) laser and compare the von Linde method with two pure time domain methods for calculating the timing jitter of such a system. We find that all three methods yield the same dependence of the timing jitter on the external cavity roundtrip time (delay time). Of these methods, the so-called long term jitter method is significantly less computationally expensive. We therefore use this method to investigate the influence of the delay time, feedback strength, and amplitude-phase coupling on the timing jitter. Our results show that, with vanishing amplitude-phase coupling, greater timing jitter reduction can be achieved with long delay times and larger feedback strengths, when feedback is near resonance. Off resonance, the timing jitter is increased. Non-vanishing amplitude-phase coupling can lead to destabilized pulse stream, even at the feedback main resonances.