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中文摘要：
通过数值求解传播方程,研究了当空气中含有微量处于激发态的氧分子时,飞秒激光脉冲在其中的传播过程,并对比了常压和低压下的结果。数值模拟结果表明,当气体中含有激发态分子时,会影响激光脉冲在其中的传播过程,而且激发态分子所占的比重越大,对激光强度的时间和空间分布的影响越大。
英文摘要：
The propagation of femtosecond laser pulse in the air containing a small amount of oxygen molecule in excited state is investigated by numerically solving the propagation equation, and the numerical results in both normal and low atmospheric pressures are compared. The numerical simulation results show that when the air contains excited molecules, it will affect the propagation process of the laser pulse. The bigger the proportion of the excited molecules is, the greater the influence of it on the time and spatial distribution of the laser intensity will be.
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