Relativistic self-focusing of cosh-Gaussian laser beams in a plasma

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• 作者：S.D. Patil ; ^{sdpatil_phy@rediffmail.com} ; M.V. Takale ; S.T. Navare ; V.J. Fulari ; M.B. Dongare
• 关键词：Cosh-Gaussian ; Plasma ; Relativistic
• 刊名：Optics and Laser Technology
• 出版年：2012
• 出版时间：March, 2012
• 年：2012
• 卷：44
• 期：2
• 页码：314-317
• 全文大小：1K

文摘

In the present paper, we have proposed to exploit an analysis of a self-consistent, steady state, theoretical model, which explains the propagation of cosh-Gaussian laser beams in a plasma. The nonlinearity we have considered is of relativistic type. Using the expression for the dielectric function, we have setup the differential equation for beam-width parameter using the WKB and paraxial approximations. The effect of decentred parameter of the beam on the critical curve and the dependence of the beam-width on the distance of propagation have been specifically considered. The results have been presented in the form of graphs and discussed.