Intensity Spikes in Laser Filamentation: Diagnostics and Application
Intensity Spikes in Laser Filamentation: Diagnostics and Application
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DOI：
10.1103/physrevlett.103.043901
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发表时间：
2009-07-24
影响因子：
8.6
通讯作者：
Couairon, Arnaud
中科院分区：
文献类型：
--
作者：
Gaarde, Mette B.;Couairon, Arnaud
我们给出了激光在Ar中驱动成丝的亚周期精度的计算，结果表明，在重复的尖峰期间，激光峰值强度可以超过夹持强度3倍，这种尖峰可以持续几厘米以上。高强度出现在主脉冲后缘的几飞秒子脉冲期间，并产生可从灯丝中提取的孤立的500阿秒、2pJ的脉冲。我们还表明，从灯丝中发出的高次谐波辐射是强度尖峰的一个很好的诊断方法。
We present calculations with subcycle precision of laser-driven filamentation in argon which show that the laser peak intensity can exceed the clamping intensity by a factor of 3 during recurring spikes which can last over several centimeters of propagation. The high intensity occurs during a few-femtosecond subpulse in the trailing edge of the main pulse and gives rise to isolated 500 attosecond, 2 pJ pulses which can be extracted from the filament. We also show that the high harmonic radiation emerging from the filament is an excellent diagnostic of the intensity spikes.