Optimal laser-pulse energy partitioning for air ionization

被引：12

作者：

Schubert, Elise ^{[1
]}

Brisset, Jean-Gabriel ^{[1
,2
]}

Matthews, Mary ^{[1
]}

Courjaud, Antoine ^{[3
]}

Kasparian, Jerome ^{[1
]}

Wolf, Jean-Pierre ^{[1
]}

机构：

[1] Univ Geneva, GAP, 22 Chemin Pinchat, CH-1211 Geneva 4, Switzerland

[2] Max Born Inst, Max Born Str 2A, D-12489 Berlin, Germany

[3] Amplitude Syst, 11 Ave Canteranne, F-33600 Pessac, France

来源：

PHYSICAL REVIEW A | 2016年 / 94卷 / 03期

关键词：

INDUCED BREAKDOWN SPECTROSCOPY; TRANSPARENT MEDIA; NANOSECOND LASER; ELECTRIC-FIELD; FEMTOSECOND; FILAMENTS; DISCHARGES; LIGHT; PROPAGATION; STREAMERS;

D O I：

10.1103/PhysRevA.94.033824

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the pulse partitioning of a 6.3-mJ, 450-fs pulse at 1030 nm to produce plasma channels. At such moderate energies, splitting the energy into several subpulses reduces the ionization efficiency and thus does not extend the plasma lifetime. We numerically show that when sufficient energy to produce multifilamentation is available, splitting the pulse temporally in a pulse train increases the gas temperature compared to a filament bundle of the same energy. This could improve the mean free path of the free electrons, therefore enhancing the efficiency of discharge triggering.

引用

页数：7

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