Interference Model of Femtosecond Laser Pulse Conical Emission in Dispersive Medium

被引：34
|
作者：
Dormidonov, A. E. [1 ]
Kandidov, V. P. [1 ]
机构：
[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119992, Russia
来源：
LASER PHYSICS | 2009年 / 19卷 / 10期
基金：
俄罗斯基础研究基金会;
关键词：
WHITE-LIGHT LASER; SUPERCONTINUUM GENERATION; OPTICAL MEDIA; FILAMENTATION; COMPRESSION; PROPAGATION; GASES; FIELD; INTENSE; FIBERS;
D O I：
10.1134/S1054660X09190062
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A simple interference model is proposed for conical emission frequency-angular spectrum formation during the filamentation of femtosecond laser pulse in a nonlinear dispersive medium. The model allows to obtain analytical expressions for frequency-angular distributions of the supercontinuum spectral components of pulses at different wavelengths in media with arbitrary material dispersion law. The model reproduces the supercontinuum frequency-angular spectrum transformation for the case of laser pulse splitting into several subpulses and for multiple refocusing of the light field in filament. Frequency-angular spectra analytically calculated from the proposed interference model are in good agreement with the results of numerical simulations performed for the filamentation of femtosecond laser pulses in fused silica.
引用
收藏
页码：1993 / 2001
页数：9
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