Filamentation of IR and UV femtosecond pulses upon focusing in air

被引：25
|
作者：
Dergachev, A. A. [1 ,2 ]
Ionin, A. A. [3 ]
Kandidov, V. P. [1 ,2 ]
Seleznev, L. V. [3 ]
Sinitsyn, D. V. [3 ]
Sunchugasheva, E. S. [3 ]
Shlenov, S. A. [1 ,2 ]
机构：
[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia
[2] Moscow MV Lomonosov State Univ, Ctr Int Laser, Moscow 119991, Russia
[3] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia
来源：
QUANTUM ELECTRONICS | 2013年 / 43卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
filamentation; femtosecond laser pulse; laser-induced plasma; UV filaments; ULTRAVIOLET-LASER FILAMENTS; NONLINEAR REFRACTIVE-INDEX; PROPAGATION; PHYSICS;
D O I：
10.1070/QE2013v043n01ABEH015007
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The filamentation of IR and UV laser pulses has been studied numerically and experimentally for different initial beam focusing geometries, and linear electron density profiles along the plasma channel of filaments have been obtained. The results demonstrate that changes in laser beam focusing have a stronger effect on filament and plasma channel parameters for UV radiation than for IR radiation. Focusing causes individual high fluence regions produced by refocusing to merge to form a continuous extended filament with a continuous plasma channel.
引用
收藏
页码：29 / 36
页数：8
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