Non-paraxial theory of self-focusing/defocusing of Hermite cosh Gaussian laser beam in rippled density plasmas

被引：6

作者：

Pathak, Nidhi ^{[1
]}

Kaur, Manpreet ^{[1
,2
]}

Kaur, Sukhdeep ^{[1
]}

Gill, T. S. ^{[1
]}

机构：

[1] Guru Nanak Dev Univ, Dept Phys, Amritsar 143005, Punjab, India

[2] Govt Middle Sch, Raunt, Punjab, India

来源：

CONTRIBUTIONS TO PLASMA PHYSICS | 2019年 / 59卷 / 10期

关键词：

Hermite cosh Gaussian beam; relativistic non-linearity; self-focusing; self-trapping; PROPAGATION; PULSE;

D O I：

10.1002/ctpp.201900026

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Present research work focuses on study of self-focusing and self-trapping of Hermite cosh Gaussian (HchG) laser beams in rippled density plasma by considering relativistic non-linearity. The coupled non-linear differential equations for the beam width parameters (for modes m = 0, 1, and 2) were derived by employing higher-order correction in comparison to paraxial ray theory by expanding dielectric function and eikonal up to r(4) terms. It is observed that the inclusion of higher-order terms significantly influence the off-axial properties for m >= 1 mode indices. Furthermore, the effect of parameters including beam intensity, ripple factor, depth of density modulation, and decentred parameter on self-focusing and self-trapping is analysed and discussed both analytically and numerically.

引用

页数：14

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