中国激光, 2017, 44 (9): 0902002, 网络出版: 2017-09-07
飞秒激光脉冲在部分激发气体中的传播 下载: 826次
Propagation of Femtosecond Laser Pulses in Partially Excited Gas
激光光学 飞秒激光 成丝 等离子体通道 激发态分子 laser optics femtosecond laser filamentaion plasma channel excited molecules
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。
Abstract
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.
李苏宇, 费德厚, 金明星. 飞秒激光脉冲在部分激发气体中的传播[J]. 中国激光, 2017, 44(9): 0902002. 李苏宇, 费德厚, 金明星. Propagation of Femtosecond Laser Pulses in Partially Excited Gas[J]. Chinese Journal of Lasers, 2017, 44(9): 0902002.