Optical beam dynamics in a gas repetitively heated by femtosecond filaments.
Optical beam dynamics in a gas repetitively heated by femtosecond filaments.
复制标题
由飞秒灯丝重复加热的气体中的光束动力学。
DOI：
10.1364/oe.21.028980
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发表时间：
2013
期刊：
影响因子：
3.8
通讯作者：
H. Milchberg
中科院分区：
文献类型：
--
作者：
N. Jhajj;Yu;J. Wahlstrand;H. Milchberg
我们研究了由高重复率飞秒激光脉冲驱动的气体中丝化的光束指向动力学。当气体突然暴露于千赫兹的灯丝脉冲序列时，连续的灯丝会从其原始方向转向新的稳定方向，其平衡由气体中的浮力、粘性和扩散过程之间的平衡决定。波束模式被保留。显示的结果针对氙气和空气，但广泛适用于在气体中采用强、高重复率飞秒激光脉冲的所有配置。
We investigate beam pointing dynamics in filamentation in gases driven by high repetition rate femtosecond laser pulses. Upon sudden exposure of a gas to a kilohertz train of filamenting pulses, successive filaments are steered from their original direction to a new stable direction whose equilibrium is determined by a balance among buoyant, viscous, and diffusive processes in the gas. The beam mode is preserved. Results are shown for Xe and air, but are broadly applicable to all configurations employing intense, high repetition rate femtosecond laser pulses in gases.