Production and characterization of a fully ionized He plasma channel

被引：73

作者：

Gaul, EW ^{[1
]}

Le Blanc, SP

Rundquist, AR

Zgadzaj, R

Langhoff, H

Downer, MC

机构：

[1] Univ Texas, Dept Phys, Austin, TX 78712 USA

[2] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 25期

关键词：

D O I：

10.1063/1.1329323

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report guiding of intense (I=1.3 +/-0.7x10(17) W/cm(2)) 80 fs laser pulses with negligible spectral distortion through 1.5-cm-long preformed helium plasma channels. Channels were formed by axicon-focused laser pulses of either 0.3 J energy, 100 ps duration, after preionizing a 200-700 Torr backfill of He gas to n(e)similar to 10(16) cm(-3) with a pulsed electrical discharge; or 0.6-1.1 J energy, 400 ps duration, which required neither preionization nor intentional impurities for seeding. Transverse interferometry showed that He was fully ionized on the channel axis in both cases. Identical femtosecond pulses suffered substantial ionization-induced blueshifts after propagating through Ar and Ne channels of similar dimensions. (C) 2000 American Institute of Physics. [S0003-6951(00)04648-9].

引用

页码：4112 / 4114

页数：3

共 17 条

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