Low Resistance and Long Lifetime Plasma Channel Generated by Filamentation of Femtosecond Laser Pulses in Air

An experimental investigation of the length and resistance of the laser plasma channel generated by filamentation of fs laser pulses in air was presented. It was found that the length of the plasma channel was different from that of the laser filament. This phenomenon was commensurate with a special...

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Published inPlasma science & technology Vol. 12; no. 3; pp. 295 - 299
Main Author 季忠刚 朱佳斌 王占新 葛晓春 王文跃 刘建胜 李儒新
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.06.2010
Subjects
Amplification
Amplifiers
Channels
Femtosecond
Filaments
Ionization
Laser plasmas
Lasers
Low resistance
低电阻
激光等离子体
离子通道
等离子体通道
长寿命
飞秒激光脉冲
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ISSN1009-0630
DOI10.1088/1009-0630/12/3/10

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Summary:An experimental investigation of the length and resistance of the laser plasma channel generated by filamentation of fs laser pulses in air was presented. It was found that the length of the plasma channel was different from that of the laser filament. This phenomenon was commensurate with a special self-guide mechanism without ionization. Through increase of the laser energy the plasma channel could be prolonged and the resistance could be reduced. To get even lower resistance, more effective control would be needed over the multi-filament. The lifetime of the plasma channel was increased by a factor of 4.5 by pulse sequences, which were generated by detuning the regenerative amplifier in the chirped pulse amplification （CPA） laser system.
Bibliography:self-focus, laser filament, laser plasma channel, resistance, lifetime
TN24
Q73
34-1187/TL
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1009-0630
DOI:10.1088/1009-0630/12/3/10