Abstract：This lecture will present on the generation of intense soft x-ray pulses and its application to nonlinear multiphoton processes. Using such nonlinear processes, the temporal width of the 42 eV soft x-ray pulse was measured directly by an autocorrelation technique. A train of attosecond pulses was also characterized by interferometric autocorrelation using Coulomb explosion of molecules. Intense high harmonics produced by phase-matching technique enable the observation of these nonlinear optical processes.

报告摘要：报告将介绍软x射线脉冲的产生以及它在非线性多光子过程的应用。利用这种非线性过程， 采用一种自相关技术可以测量42eV的软x射线脉冲的时间上的宽度。基于分子库伦爆炸，采用干涉测量的自相关技术可以将阿秒脉冲链的特征刻画出来。利用相位匹配技术产生的高强度的高次谐波能够用来观察这些非线性光学过程。