摘要
分析了飞秒激光脉冲在大气中传输时光丝的形成机理。克尔效应引起的光束自聚焦与多光子电离产生的等离子体散焦作用共同导致光丝的形成和长距离传输。讨论了光丝长距离传输特性在超宽带激光雷达和激光引导闪电等方面的潜在应用。
The mechanism of filamentation formed by femtosecond pulse laser beam propagating in atmosphere is investigated. The balance between the self-focusing of laser beam due to Kerr effect is countered by plasma defocusing caused by multiphoton ionization creates the stabilized long-distance filament propagation in atmosphere. The potential application of filament in ultra-wide-band lidar and laser induced lightning is also analyzed.
出处
《激光技术》
CAS
CSCD
北大核心
2003年第3期256-258,共3页
Laser Technology
基金
空军工程大学学术基金资助项目
关键词
飞秒激光
大气传输
光丝
激光雷达
激光引雷
femtosecond laser
propagation in atmosphere
filament
lidar
laser induced lightning
