Characteristics of self-guided laser plasma channels generated by femtosecond laser pulses in air

被引：126

作者：

Yang, H ^{[1
]}

Zhang, J ^{[1
]}

Li, YJ ^{[1
]}

Zhang, J ^{[1
]}

Li, YT ^{[1
]}

Chen, ZL ^{[1
]}

Teng, H ^{[1
]}

Wei, ZY ^{[1
]}

Sheng, ZM ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Lab Opt Phys, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW E | 2002年 / 66卷 / 01期

关键词：

D O I：

10.1103/PhysRevE.66.016406

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

With ultrashort laser pulses (25 fs) and low energy (E=15 mJ), we observe laser plasma channels with a length over 5 m in air. The diameter of the plasma channel is measured to be 120 mum. The average electron density in the channel is inferred to be about 10(18) W/cm(3) with an interferometric method. At the same time, the temporal evolution of the electron density in the plasma channel is investigated. The resistivity in the plasma channel is measured to be less than 1Omega cm. It is suggested that the lifetime of the plasma channel can be greatly prolonged by launching another long laser pulse along the plasma channel.

引用

页数：4

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