大气中激光等离子体通道寿命的延长及测量分析  

The measurement and analysis of the prolonged lifetime of the plasma channel formed by short pulse laser in air

作　　者：董全力[1] 燕飞[1] 张杰[1] 金展[1] 杨辉[1] 郝作强[1] 陈正林[1] 李玉同[1] 魏志义[1] 盛政明[1] 

机构地区：[1]中国科学院物理研究所光学开放实验室,北京100080

出　　处：《物理学报》2005年第7期3247-3250,共4页Acta Physica Sinica

摘　　要：介绍了一种反卷积方法.利用该方法分析了实验中测得的等离子体通道的光电信号特征,获得了空气中等离子体通道的真实寿命.还证明了利用双脉冲激光结构,可以将等离子体寿命延长近5倍.The Tikhonov regularization method is applied to analyze the lifetime of the plasma channel produced by femtosecond laser pulses propagating in air. Experiments show that by using double laser pulses separated by several nanoseconds, the lifetime of the plasma channel can be prolonged by 5 times that of only using one laser pulse.

关 键 词：等离子体通道 测量分析 大气 信号特征 脉冲激光 寿命延长 反卷积 

分 类 号：O536[理学—等离子体物理]