Pulse-energy dynamics of passively mode-locked solid-state lasers above the Q -switching threshold
Pulse-energy dynamics of passively mode-locked solid-state lasers above the Q -switching threshold
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DOI：
10.1364/josab.21.001469
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发表时间：
2004-08
影响因子：
1.9
通讯作者：
A. Schlatter;S. Zeller;R. Grange;R. Paschotta;U. Keller
中科院分区：
文献类型：
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作者：
A. Schlatter;S. Zeller;R. Grange;R. Paschotta;U. Keller
通过测量泵浦功率调制对输出功率的影响，研究了各种被动锁模固体激光器的动力学行为。我们从理论和实验上展示了如何减少弛豫振荡的阻尼，并最终成为零时，泵浦功率降低，使Q开关锁模的阈值接近。据我们所知，这种方法第一次提供了重要的信息，锁模的稳定性高于调Q锁模阈值。它适用于用慢饱和吸收体锁模的激光器。结果有助于解释在两种情况下的Q开关阈值意外低的原因。同时也得到了一些有用的光谱信息。
We have investigated the dynamical behavior of various passively mode-locked solid-state lasers by measuring how a modulation of the pump power affects the output power. We show theoretically and experimentally how the damping of the relaxation oscillations is reduced and finally becomes zero when the pump power is reduced so that the threshold for Q-switched mode locking is approached. For the first time to our knowledge, this method provides important information on the stability of mode locking above the Q-switched mode-locking threshold. It is applicable to lasers that are mode locked with slow-saturable absorbers. The results helped to explain the cause of unexpectedly low Q-switching thresholds in two cases. Also we obtain some useful spectroscopic information.