超高斯强激光在等离子体中传播的自聚焦

Self-Focusing of Ultra-Intensity Super-Gaussian Beams Propagating in the Plasmas

通过数值求解非线性近轴波方程 ,研究了在等离子体中传输的超高斯强激光的自聚焦行为 .结果表明 ,自聚焦形成的环在初始光束受到扰动时出现环分裂的现象 ,同时由于自由电子的散焦作用 。

The behavior of self-focusing of the ultra-intensity rotation symmetric super-Gaussian beam (RSSGB) during propagation in the plasmas is studied,with the aid of the numerical solution to the nonlinear paraxial wave equation.The result implies for a RSSGB with initial undulations,the self-focusing ring may split after traveling certain distance inside the plasmas.And because of the effect of the defocusing free-electron,the self-focusing ring is limited within a certain scales.