超短强激光脉冲在大气传播中的自聚焦行为  

Ultra-Short Intense Laser Pulse Propagating in Atmosphere: Behavior of Self-Focusing

作　　者：胡雪原[1] 钟方川[1] 邓建[1] 张正泉[1] 

机构地区：[1]中科院上海光学精密机械研究所强光光学开放实验室,上海201800

出　　处：《光学学报》2001年第6期641-646,共6页Acta Optica Sinica

摘　　要：通过建立涉及克尔效应和多光子电离效应的非线性数学模型 ,利用数值方法研究了超短激光脉冲在大气传播中的自聚焦行为。结果表明由自聚焦导致的成丝现象具有间断性 ,而不是一种稳态的模式。每次轴上的成丝都会由于光场损耗而减弱 ,但同时由于克尔效应会使离轴区域的能量间断地补充到光轴上。The behavior of self-focusing of the ultra-short intense laser pulse during propagating in atmosphere was studied, particularly, using the numeric solution of a time dependent Schodinger equation on account of Kerr effect and multi-photon ionization of a time dependent result implies the intermittence, rather than the stable structure, of the filamentation caused by self-focusing. Each filamentation will decay due to the ionization while the off axis energy will replenish to the on-axis region intermittently due to Kerr effect.

关 键 词：自聚焦 克尔效应 多光子电离 超短强激光脉冲 大气 传输 

分 类 号：O437.5[机械工程—光学工程] TN241[理学—光学]