摘要
飞秒激光脉冲在空气中传播时,当克尔自聚焦效应与等离子散焦效应达到动态平衡之后,会形成稳定的等离子体通道。这个过程中伴随着超连续谱产生、太赫兹辐射、高次谐波发射和荧光发射等非线性现象。回顾了飞秒激光成丝的机理,介绍了国内外在飞秒激光成丝的应用以及控制方法方面的研究现状和进展。
During the propagation of femtosecond laser pulses in air, a stable plasma channel will be formed when Kerr self-focu- sing effect and plasma defocusing effect reach a dynamical balance. Quite a few nonlinear phenomena like the supercontinuum gen eration, THz emission, high-order harmonic generation, and fluorescence emission will be generated during this process. In this paper, we attempt to review the mechanism of femtosecond laser filamentation, and introduce the current status and advances in the application and control method of femtosecond laser filamentation at home and abroad.
出处
《中国科技论文》
CAS
北大核心
2016年第17期1934-1941,共8页
China Sciencepaper
基金
国家重点基础研究发展计划资助项目(2013CB922200)
国家自然科学基金资助项目(11474129)
高等学校博士学科点专项科研基金资助项目(20130061110021)
关键词
飞秒激光
成丝
等离子体通道
自聚焦
femtosecond laser
filamentation
plasma channel
self-focusing
