【摘要】 <正> 利用具有弛豫效应的非线性介质中的光束传输方程,分析超距脉冲的动态自陷,得出准稳态超短脉冲的束径时间分布。利用束径分布特性,在传输光轴上设置小孔,可有效进行脉冲压缩。并对适当的光束参数进行定量压缩比计算。更多还原

【Abstract】 The dynamic self-trapping pfi ultrashort pulse has been investigated by means of light transmission equation in nonlinear medium with relaxation effect. The time distribution of light beam diameter is obtained for quasi-stable ultrashort pulse. Using the property of ray diameter distribution, a small hole is placed along the transmission axis, the pulse compression can be performed efficiently. The quantitative calcination of the compression ratio is given for appropriate light beam paramter.更多还原