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 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 multifilament. 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.
self-focus laser filament laser plasma channel resistance lifetime
JI Zhonggang ZHU Jiabin WANG Zhanxin GE Xiaochun WANG Wenyue LIU Jiansheng LI Ruxin
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
国际会议
西安
英文
295-299
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）