气体等离子体辐射光声信号检测与分析

摘要

气体等离子体做为一种新的辐射源,因具有辐射范围宽等优点而备受关注.本文对强飞秒激光脉冲诱导大气等离子体辐射光声信号现象进行了探究,用实验的方法探测和分析了激光脉冲能量、偏振方向以及声传输的径向距离对光声信号强度的影响.%As a new radiation source,gas plasma has attracted considerable attentions due to its wide coverage in spec-trum.The phenomenon of photoacoustic signal from air plasma induced by intense femtosecond laser pulse was stud-ied.The influences of laser pulse energy,polarization direction and radial distance on photoacoustic signal intensity were studied and analyzed by the experiments.