Density Transition Based Self-Focusing of cosh-Gaussian Laser Beam in Plasma with Linear Absorption

被引:41
作者
Kant, Niti [1 ]
Wani, Manzoor Ahmad [1 ]
机构
[1] Lovely Profess Univ, Dept Phys, Phagwara 144411, Punjab, India
关键词
self-focusing; cosh-Gaussian beam; plasma density ramp; nonlinearity; linear absorption; PROPAGATION; ACCELERATION; ELECTRONS;
D O I
10.1088/0253-6102/64/1/103
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Density transition based self-focusing of cosh-Gaussian laser beam in plasma with linear absorption has been studied. The field distribution in the plasma is expressed in terms of beam width parameter, decentered parameter, and linear absorption coefficient. The differential equation for the beam width parameter is solved by following Wentzel-Kramers-Brillouin (WKB) and paraxial approximation through parabolic wave equation approach. The behaviour of beam width parameter with dimensionless distance of propagation is studied at optimum values of plasma density, decentered parameter and with different absorption levels in the medium. The results reveal that these parameters can affect the self-focusing significantly.
引用
收藏
页码:103 / 107
页数:5
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