Higher-Order Kerr Terms Allow Ionization-Free Filamentation in Gases

被引：228

作者：

Bejot, P. ^{[1
,2
]}

Kasparian, J. ^{[1
]}

Henin, S. ^{[1
]}

Loriot, V. ^{[2
]}

Vieillard, T. ^{[2
]}

Hertz, E. ^{[2
]}

Faucher, O. ^{[2
]}

Lavorel, B. ^{[2
]}

Wolf, J. -P. ^{[1
]}

机构：

[1] Univ Geneva, GAP Biophoton, CH-1211 Geneva 4, Switzerland

[2] Univ Bourgogne, Lab ICB, UMR 5209, CNRS, F-21078 Dijon, France

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 10期

关键词：

FEMTOSECOND LASER-PULSES; TRANSPARENT MEDIA; AIR; LIGHT; PROPAGATION; COMPRESSION; INTENSITY; PHYSICS;

D O I：

10.1103/PhysRevLett.104.103903

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that higher-order nonlinear indices (n(4), n(6), n(8), n(10)) provide the main defocusing contribution to self-channeling of ultrashort laser pulses in air and argon at 800 nm, in contrast with the previously accepted mechanism of filamentation where plasma was considered as the dominant defocusing process. Their consideration allows us to reproduce experimentally observed intensities and plasma densities in self-guided filaments.

引用

页数：4

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