The experimental and theoretical studies on the pulse preionization of high power CW CO2 laser are presented in this paper and the photoionization process ia emphersized.
The using of chirped laser pulse can restrain the Rabi oscillations and realize high efficiency of photoionization.
利用光脉冲的啁啾效应，可以抑制拉比振荡实现高效率的光电离。
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When the theory is applied to the photoionization of atoms in two-color laser fields, a qualitative agreement between the theory and the experiments is also obtained.