Transverse-mode dependence of femtosecond filamentation

被引：19
作者：
Song, Zhenming [1 ]
Zhang, Zhigang [2 ]
Nakajima, Takashi [1 ]
机构：
[1] Kyoto Univ, Inst Adv Energy, Kyoto 6110011, Japan
[2] Beijing Univ, Inst Quantum Elect, Sch Elect Engn & Comp Sci, Beijing 100871, Peoples R China
来源：
OPTICS EXPRESS | 2009年 / 17卷 / 15期
关键词：
LAGUERRE-GAUSSIAN MODES; ULTRASHORT LASER-PULSES; BESSEL BEAMS; SPIRAL PHASEPLATE; PLASMA CHANNELS; AIR; GENERATION; WAVE; COMPRESSION; PROPAGATION;
D O I：
10.1364/OE.17.012217
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We theoretically investigate the transverse-mode dependence of femtosecond filamentation in Ar gas. Three different transverse modes, Bessel, Gaussian, and Laguerre modes, are considered for incident laser pulses. By solving the extended nonlinear Schrodinger equation coupled with the electron density equation, we find that the lengths of the filament and the plasma channel induced by the Bessel incident beam is much longer than the other transverse modes with the same peak intensity, pulse duration, and beam diameter. Moreover we find that the temporal profile of the pulse with the Bessel incident mode is nearly undistorted during the propagation. Since the pulse energy that the Bessel beam can carry is more than one order of magnitude larger than the other modes for the same peak intensity, pulse duration, and beam diameter, the Bessel beam can be a very powerful tool in ultrafast nonlinear optics involving propagation in a Kerr medium. (C) 2009 Optical Society of America
引用
收藏
页码：12217 / 12229
页数：13
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