摘要
通过对高功率激光空气击穿的物理机理、电离机制的讨论,得到空气击穿过程中激光焦区内自由电子密度公式。考虑电子弹性碰撞损耗、电子复合损耗影响,给出了新的击穿阈值公式。该公式的计算结果同实验数据一致。
Through discussing physical mechanism of optical breakdown in air caused by high power laser and ionization, the formula of free electron density in laser focus regime was attained. In addition, the breakdown threshold formula was also obtained after considering the energy loss of electron elastic collision and recombination. The calculated results are consistent with the experimental data.
出处
《激光技术》
CAS
CSCD
北大核心
2005年第5期501-503,506,共4页
Laser Technology
基金
国家自然科学基金资助项目(60378003)
关键词
空气击穿
电子密度
阈值
雪崩电离
optical breakdown in air
electron density
threshold value
cascade ionization
