论文标题
Kerr-Lens模式锁定激光器中的衍射饱和损耗机制：直接观察和模拟
The diffractive saturable loss mechanism in Kerr-lens mode-locked lasers: direct observation and simulation
论文作者
论文摘要
被动模式锁定非常依赖于可饱和损耗机制形成超短脉冲。但是，在Kerr-Lens模式锁定（KLM）中，没有发生实际的吸收，而是由于衍射而出现的损失，实际的光必须逃脱腔。 Kerr-Lens效应可通过衍射产生有效的瞬时饱和吸收器，该吸收仪非常依赖于脉冲的空间和时间分布之间的相互作用。尽管KLM作为产生超快脉冲的技术和衍射损失在其运行中的基本作用的重要性，但从未直接观察到这些损失。在这里，我们测量了由于在硬施加的Kerr-Lens模式锁定Ti：蓝宝石激光器中衍射损失而导致的光，并将测量结果与数值理论进行比较，该数值理论明确计算了脉搏的时空行为。
Passive mode-locking critically relies on a saturable loss mechanism to form ultrashort pulses. However, in Kerr-lens mode-locking (KLM), no actual absorption takes place, but rather losses appear due to diffraction, and actual light must escape the cavity. The Kerr-lens effect works to generate through diffraction an effective instantaneous saturable absorber that delicately depends on the interplay between the spatial and temporal profiles of the pulse. Despite the importance of KLM as a technique for generating ultrafast pulses and the fundamental role of the diffraction losses in its operation, these losses were never directly observed. Here, we measure the light that leaks out due to diffraction losses in a hard-aperture Kerr-lens mode-locked Ti:Sapphire laser, and compare the measured results with a numerical theory that explicitly calculates the spatio-temporal behavior of the pulse.
