摘要
通过数值模拟光丝与负电晕相互作用过程中的空间电场分布,实验观测飞秒激光诱导负电晕放电现象,研究了空气中飞秒激光光丝与针-板电极结构中产生的负电晕之间的相互作用的规律和机理。模拟和实验结果表明,在相互作用过程中,光丝末端出现高于雪崩电离阈值的空间电场分布,产生了负电晕放电现象。通过调控光丝长度可以控制负电晕的作用区域,由此提出一种全光诱导负电晕的新方法。
The investigation on the interaction between femtosecond laser filaments in air and negative corona discharge in the needle-plane electrode is reported, The spatial distribution of electric field of the interaction is theoretically simulated and the phenomena of laser guided negative corona is observed experimentally during the interaction process. The setup is established to understand this process. Both the simulation and experiment results show that the electric field distributions with the strength higher than the threshold for avalanche ionization do exist during the interaction process. As a consequence negative corona is guided at the end of laser filament. The negative corona area can be altered through the control of filament length, which provides a new method to optically guide negative corona,
作者
张健浩
王铁军
朱忠彬
刘尧香
陈娜
李儒新
Zhang Jianhao; Wang Tiejun; Zhu Zhongbin; Liu Yaoxiang; Chen Na; Li Ruxin(State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China ; University of Chinese Academy of Sciences, Beijing 100049, China ; 3 College of Sciences, Shanghai University, Shanghai 200444, China ; 4 Department of Physics, Tongji University, Shanghai 200092, China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2018年第10期7-14,共8页
Chinese Journal of Lasers
基金
中国科学院百人计划
中国科学院战略性先导科技专项(B类)(XDB1601)
中国科学院国际合作重点项目(181231KYSB20160045)
关键词
激光技术
负电晕放电
有限元计算
飞秒光丝
laser technique
negative corona discharge
finite element calculation
femtosecond laser filament
