摘要
围绕飞秒激光脉冲在混合气体介质中的成丝特性展开理论研究。通过数值求解非线性薛定谔传输方程,对比了不同气体介质中所形成光丝特征。研究结果表明,通过在氮气介质中掺入少量的惰性气体,可以实现对光丝内部光强、等离子体密度以及光强的时域演化特征进行调控。这一方法相比于传统方案,即通过调控入射激光脉冲参数或聚焦条件从而调控光丝特性,克服了对泵浦脉冲性能指标参数以及实验光路的依赖。该方法有望在飞秒激光诱导的非线性光谱研究领域得到更为广泛地应用。
In this paper,the properties of filament pumped by femtosecond laser pulses generated in different gas mixtures are studied theoretically.By numerically solving the nonlinear Schrodinger equation,the properties of filament generated in different gas media are compared systematically.It is found that the modulation of the internal light intensity of the filament,the plasma density and the time-domain evolution characteristics of the light intensity can be controlled by injecting a small amount of different noble gas components into pure nitrogen medium.The proposed method overcomes the dependence on the pump pulse performance index parameters and the experimental optical path modulating the incident laser pulse parameters or the focusing conditions and thus properties of filament,compared to the conventional scheme.In experiment,this method is expected to be more widely applied in the field of femtosecond nonlinear spectroscopy.
作者
井晨睿
王朝晖
亓协兴
丁超亮
JING Chen-rui;WANG Zhao-hui;QI Xie-xing;DING Chao-liang(College of Physics and Electronic Information,Luoyang Normal University,Luoyang 471934,China;Key Laboratory of Electromagnetic Transformation and Detection of Henan Province,Luoyang 471934,China;Luoyang Institute of Electro-Optical Equipment,Luoyang 471000,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2022年第10期1456-1460,共5页
Laser & Infrared
基金
国家自然科学基金资助项目(No.11704174,No.12174171)
中原英才计划项目(No.ZYYCYU 202012144)
河南省高等学校重点科研项目(No.17A140023,No.22A140026)资助。
关键词
光丝特性
混合比例
时域形态
properties of filament
doping ratio
temporal distribution
