Kerr self-defocusing of multiple filaments in TW peak power UV laser beam

被引：10

作者：

Zvorykin, V. D. ^{[1
,2
]}

Goncharov, S. A. ^{[2
]}

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

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

Ryabchuk, S. V. ^{[2
]}

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

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

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

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

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

机构：

[1] Russian Acad Sci, PN Lebedev Phys Inst, Leninskii Prospekt 53, Moscow 119991, Russia

[2] Natl Res Nucl Univ MEPhI, Kashirskoe Shosse 31, Moscow 115409, Russia

来源：

LASER PHYSICS LETTERS | 2016年 / 13卷 / 12期

基金：

俄罗斯科学基金会;

关键词：

sub-TW picosecond UV laser; multiphoton processes; laser beam homogenizing; NONLINEAR REFRACTIVE-INDEX; GARPUN-MTW; AMPLIFICATION; PULSES; SYSTEM; XENON;

D O I：

10.1088/1612-2011/13/12/125404

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An effective suppression of multiple filamentation of the sub-TW peak power supercritical laser beam in xenon gas was demonstrated in direct amplification of subpicosecond UV pulses at Ti:sapphire/KrF laser facility GARPUN-MTW. A large negative nonlinear refractive index due to a two-photon resonance of KrF laser radiation with Xe 6p[1/2](0) state ensured Kerr self-defocusing of a few hundred filaments with a local peak intensity of similar to 0.2 TW cm(-2), 200-fold higher than the average one over the beam cross section, and thus homogenized the laser beam. UV filaments in Xe produced a narrow-angle monochromatic coherent cone emission at 828 nm wavelength due to stimulated hyper-Raman scattering and amplified spontaneous emission at the transition 6p[1/2](0) -> 6s[3/2](1)(0).

引用

页数：6

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