Plasma density inside a femtosecond laser filament in air:: Strong dependence on external focusing

被引：332

作者：

Theberge, Francis ^{[1
]}

Liu, Weiwei

Simard, Patrick Tr.

Becker, Andreas

Chin, See Leang

机构：

[1] Univ Laval, Ctr Opt Photon & Laser, Ste Foy, PQ G1K 7P4, Canada

[2] Univ Laval, Dept Phys Gen Phys & Opt, Ste Foy, PQ G1K 7P4, Canada

[3] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW E | 2006年 / 74卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.74.036406

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Our experiment shows that external focusing strongly influences the plasma density and the diameter of femtosecond Ti-sapphire laser filaments generated in air. The control of plasma filament parameters is suitable for many applications such as remote spectroscopy, laser induced electrical discharge, and femtosecond laser material interactions. The measurements of the filament showed the plasma density increases from 10(15) cm(-3) to 2x10(18) cm(-3) when the focal length decreases from 380 cm to 10 cm while the diameter of the plasma column varies from 30 mu m to 90 mu m. The experimental results are in good qualitative agreement with the results of numerical simulations.

引用

页数：7

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