Production of extended plasma channels in atmospheric air by amplitude-modulated UV radiation of GARPUN-MTW Ti:sapphire - KrF laser. Part 1. Regenerative amplification of subpicosecond pulses in a wide-aperture electron beam pumped KrF amplifier

被引：21

作者：

Zvorykin, V. D. ^{[1
]}

Ionin, A. A. ^{[1
]}

Levchenko, A. O. ^{[1
]}

Mesyats, G. A. ^{[1
]}

Seleznev, L. V. ^{[1
]}

Sinitsyn, D. V. ^{[1
]}

Smetanin, I. V. ^{[1
]}

Sunchugasheva, E. A. ^{[1
]}

Ustinovskii, N. N. ^{[1
]}

Shutov, A. V. ^{[1
]}

机构：

[1] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia

来源：

QUANTUM ELECTRONICS | 2013年 / 43卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

plasma channels; ultrashort laser pulses; KrF laser; train of ultrashort pulses; VIBRATIONAL-RELAXATION; DISCHARGES; EXTRACTION; MODEL;

D O I：

10.1070/QE2013v043n04ABEH015140

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：

Regenerative amplification of single and multiple ultrashort subpicosecond UV pulses in a wide-aperture KrF amplifier with an unstable confocal resonator was investigated on the GARPUN-MTW hybrid laser system. Amplitude-modulated 100-ns long UV radiation pulses with an energy of several tens of joules were obtained at the output of the system. The pulses were a combination of a quasi-stationary oscillation pulse and a train of amplified ultrashort pulses (USPs) with a peak power of 0.2-0.3 TW, which exceeded the power of free-running lasing pulse by three orders of magnitude. The population inversion recovery time in the active KrF laser medium was estimated: tau(c) <= 2.0 ns. Trains of USPs spaced at an interval Delta t approximate to tau(c) were shown to exhibit the highest amplification efficiency. The production of amplitude-modulated UV pulses opens up the way to the production and maintenance of extended plasma channels in atmospheric air.

引用

页码：332 / 338

页数：7

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