193nm激光脉冲空气电离及导电特性研究  

Research on air ionization and conducting characters induced by 193 nm UV laser pulse

作　　者：张华[1] 方照勋[1] 陈德章[1] 路英宾[1] 

机构地区：[1]西南技术物理研究所,四川成都610041

出　　处：《激光与红外》2011年第11期1179-1182,共4页Laser & Infrared

摘　　要：实验研究了193 nm激光脉冲空气电离及其形成的等离子体导电通道导电特性,采用闪光法测得193 nm激光脉冲空气电离阈值约为9.58×109 W/cm2,用单脉冲能量约145 mJ的纳秒级193 nm紫外激光脉冲在实验室空气中建立了长度约2 m的等离子体导电通道,实验测得通道的等效电阻值可达109Ω量级,通道导电寿命约为30μs。193 nm UV laser pulses induced air ionization and the plasma channel conductivity caused by the pulses were investigated experimentally.The ionization threshold of 193 nm laser pulses is found to be about 9.58×109 W/cm2.A plasma conducting channel about 2 meters long with a resistance of 109 Ω in magnitude was established with nanosecond 193 nm UV laser pulses.The lifetime of the plasma channel is about 30 μs.

关 键 词：激光等离子体 紫外激光空气电离 空气电离阈值 等离子体导电通道 

分 类 号：TN249[电子电信—物理电子学]