光学
飞秒
丝状化
色散(光学)
脉搏(音乐)
飞秒脉冲整形
自相位调制
自聚焦
多光子脉冲内干涉相位扫描
激光器
蓝宝石
材料科学
带宽限制脉冲
外推法
钛宝石激光器
克尔效应
超短脉冲
物理
非线性光学
非线性系统
激光束
数学分析
数学
量子力学
探测器
作者
Ivan P. Christov,Henry C. Kapteyn,Margaret M. Murnane,Chung-Po Huang,Jianping Zhou
出处
期刊:Optics Letters
[The Optical Society]
日期:1995-02-01
卷期号:20 (3): 309-309
被引量:51
摘要
We present what is to our knowledge the first three-dimensional model of a femtosecond pulse propagating in a Ti:sapphire laser crystal, which includes dispersion, self-focusing, and finite response time of the medium and does not assume the slowly varying envelope approximation. The combined action of material dispersion and phase modulation leads to a dramatic space-time focusing on the pulse. Dispersion prevents catastrophic selffocusing and self-steepening of the pulse, even though the peak power of the pulse is much greater than the critical power for self-focusing filamentation. Extrapolation of these results to shorter-pulse durations shows that this space-time focusing mechanism can operate even for pulses with durations close to the response time of the Kerr nonlinearity.
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