首页|Pulse repetition rate effect on the plasma inside femtosecond laser filament in air
Pulse repetition rate effect on the plasma inside femtosecond laser filament in air
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The characteristics of plasmas play an important role in femtosecond laser filament-based applications.Spectroscopic analysis is used to experimentally investigate the plasma density and its temperature of the air filament under different pulse repetition rates.In our experiments,the measured average plasma density of the filament is 1.54 × 1017 cm-3 and the temperature of the plasma is about 5100 K under 100 Hz pulse repetition rate.The plasma density decreases to 1.43 × 1017 cm-3 and the temperature increases to 6230 K as the pulse repetition rate increases to 1000 Hz.The experimental observation agrees with the numerical simulation by solving the nonlinear Schrödinger equations with repetition rate related"low density hole"correction.
femtosecond laser filamentationcumulative effectselectron density
尹富康、王铁军、刘尧香、龙娟、魏迎霞、朱斌、周凯南、冷雨欣
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State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics and CAS Center for Excellence in Ultra-intense Laser Science,Chinese Academy of Sciences,Shanghai 201800,China
Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China
Laser Fusion Research Center and Science & Technology on Plasma Physics Laboratory,China Academy of Engineering Physics,Mianyang 621999,China
NSAFInternational Partnership Program of Chinese Academy of SciencesInternational Partnership Program of Chinese Academy of SciencesShanghai Science and Technology Program
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