The formation of an intense filament controlled by interference of ultraviolet femtosecond pulses

The formation of an intense filament controlled by interference of ultraviolet femtosecond pulses
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由紫外飞秒脉冲干涉控制的强细丝的形成

DOI:
10.1063/1.3565158
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发表时间:
2011-03
影响因子:
4
通讯作者:
en
en
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wu, Jian;Ding, Liang';Zeng, Heping;Shi, Liping;Zhang, Yisan;Chen, Peng;Wang, Yongdong;Lu, Xin;en;Ding, Liang';en

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我们实验研究了两个非共线的飞秒紫外光脉冲在干涉辅助下合并后形成的波长尺度的光子等离子体光栅。产生的等离子体光栅的周期随着相互作用的激光脉冲的交叉角而减小。对于合适的小交叉角,非共线紫外丝聚合在一起,形成直径为5 μm的强度低于聚焦极限的单根紫外丝。这可能提供了一种控制紫外线飞秒成丝的方法。
We experimentally investigated the formation of a wavelength-scale photonic plasma grating induced by interference-assisted coalescence of two noncollinear ultraviolet femtosecond laser pulses. The period of the created plasma grating decreased with the crossing angle of the interacting laser pulses. For a proper small crossing angle, the noncollinear ultraviolet filaments were coalesced and an intense single ultraviolet filament was formed with a diameter of 5 μm which was below the focused limitation. This may provide a way to control ultraviolet femtosecond filamentation.
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