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研究了激光有一定带宽情况下的光电离。首先推导了三步光电离的公式，然后从含有激光带宽的方程组出发，计算了不同情况下的电离几率对于激光带宽的依赖关系，以计算结果分析了激光带宽的选取原则。
The photoionization of a laser with a certain bandwidth was studied. First of all, the formula of three-step photoionization is derived. Then, the dependence of the ionization probability on the laser bandwidth is calculated based on the equations of the laser bandwidth. The principle of selecting the laser bandwidth is analyzed.