Filamentary pulse self-compression: The impact of the cell windows
Filamentary pulse self-compression: The impact of the cell windows
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丝状脉冲自压缩：细胞窗口的影响
DOI：
10.1103/physreva.83.043803
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发表时间：
2011
影响因子：
2.9
通讯作者：
G. Steinmeyer
中科院分区：
文献类型：
--
作者：
C. Brée;A. Demircan;J. Bethge;E. Nibbering;S. Skupin;L. Bergé;G. Steinmeyer
多毫焦耳激光脉冲在非线性传输过程中的自压缩现象通常用自聚焦和散焦效应的相互作用来解释，导致能量在传播光脉冲的轴上大量集中。最近，有人认为细胞窗口可能在自压缩机制中起决定性作用。由于这种窗口必须用于空气以外的介质，因此它们的存在通常是不可避免的，然而它们呈现出色散和非线性的突然非绝热变化，这应该导致在自压缩机制中产生的光子弹的时间和空间完整性的破坏。我们现在通过实验证明，实际上存在一种自我修复机制，有助于克服细胞窗口的潜在破坏性后果。我们在两个精心进行的实验中表明，细胞窗口的位置决定性地影响激活或抑制的自愈机制。与无窗细胞的比较表明，这种机制的存在是一个重要的先决条件，利用自压缩效应在充满惰性气体的窗口细胞。
Self-compression of multi-millijoule laser pulses during filamentary propagation is usually explained by the interplay of self-focusing and defocusing effects, causing a substantial concentration of energy on the axis of the propagating optical pulse. Recently, it has been argued that cell windows may play a decisive role in the self-compression mechanism. As such windows have to be used for media other than air their presence is often unavoidable, yet they present a sudden nonadiabatic change in dispersion and nonlinearity that should lead to a destruction of the temporal and spatial integrity of the light bullets generated in the self-compression mechanism. We now experimentally prove that there is, in fact, a self-healing mechanism that helps to overcome the potentially destructive consequences of the cell windows. We show in two carefully conducted experiments that the cell window position decisively influences activation or inhibition of the self-healing mechanism. A comparison with a windowless cell shows that the presence of this mechanism is an important prerequisite for the exploitation of self-compression effects in windowed cells filled with inert gases.