对超短脉冲激光引雷产生的等离子体通道的特性分析
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摘要: 利用隧道电离诱导闪电模型，对超短脉冲激光在大气中产生弱等离子体通道的电阻和阈值强度进行了分析和计算。结果显示：强度为1014 W/cm2量级的超短脉冲激光产生的气体等离子体通道有较好的导电性，所需激光能量很小, 说明在该模型下激光能量的利用效率很高。Abstract: When ultra-short laser pulses propagate in air, the plasma channel would be formed by the modulation of tunnel-ionization. In this paper, the resistivity of the plasma channel was evaluated and analyzed. It was found that the threshold intensity to create plasma channels is about 1014W/cm2. The required energy is small, so that laser beam can propagate very long distance.
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Key words:
- ultra-short pulses laser /
- tunnel ionization /
- laser triggered lightning
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