Abstract An analysis of the self-focusing of highly intense chirped pulse laser under exponential plasma density ramp with higher order value of axial electron temperature has been done. Beam width parameter is derived by using paraxial ray approximation and then solved numerically. It is seen that self-focusing of chirped pulse laser is intensely affected by the higher order values of axial electron temperature. Further, influence of exponential plasma density ramp is studied and it is concluded that self-focusing of laser enhances and occurs earlier. On the other hand defocusing of beam reduces to the great extent. It is noticed that the laser spot size reduces significantly under joint influence of the density ramp and the axial electron temperature. Present analysis may be useful for the analysis of quantum dots, the laser induced fusion and etc.

中文翻译：

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轴向电子温度和指数等离子体密度斜率对等离子体中啁啾激光自聚焦的综合影响

摘要 分析了具有较高轴向电子温度阶值的指数等离子体密度斜坡下高强度啁啾脉冲激光器的自聚焦特性。光束宽度参数是通过使用近轴射线近似推导出来的，然后进行数值求解。可见，啁啾脉冲激光的自聚焦受轴向电子温度高阶值的影响很大。此外，研究了指数等离子体密度斜坡的影响，并得出结论，激光的自聚焦增强并发生得更早。另一方面，光束的散焦大大减少。值得注意的是，在密度斜坡和轴向电子温度的共同影响下，激光光斑尺寸显着减小。目前的分析可能对量子点的分析有用，