【摘要】 研究了超短强激光脉冲在非扰动抛物型部分电离的预等离子体隧道中的传输特性 .从Maxwell方程出发得到了两个包含衍射、三阶强度非线性、等离子体散焦、等离子体隧道聚焦以及相对论自聚焦等效应在内的激光场演化方程 ,即折射率方程和哈密顿 雅可比方程 .在此基础上得到了激光在等离子体隧道中传输的包络方程以及光斑半径与传输距离、隧道宽度等初始参量的关系更多还原

【Abstract】 Characteristics of propagation of ultrashort intense laser pulses in a partially stripped pre formed plasma channel, assumed to be parabolic and unperturbed, are discussed. From Maxwell equations the refractive index equation and Hamilton Jacobi equation, which describe the evolution of the electric field, are derived including the effects of the diffraction, the third order intensity dependent nonlinearity, plasma defocusing, the self focusing of the plasma channel, and the relativistic self focusing. The envelope equation of laser propagating in the plasma channel, and the general expression relating the laser spot size with the propagation distance and the width of the plasma channel etc., are derived based on the Hamilton Jacobi equation and the refractive index equation.更多还原