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| 光束自聚焦的矢量理论研究 | |
| 引用本文： | 文双春, 范滇元. 光束自聚焦的矢量理论研究[J]. 强激光与粒子束, 2001, 13(01). |
| 作者姓名： | 文双春 范滇元 |
| 作者单位： | 1.中国科学院 上海光学精密机械研究所,高功率激光物理国家实验室,上海 201 800 |
| 摘 要： | 基于矢量非傍轴非线性Schr-dinger方程，利用调制理论研究了光束的自聚焦特性，比较了非零电场散度项和非傍轴项在消除自聚焦崩塌方面的贡献。结果表明，引入两项之一都可使光束聚焦到一有限宽度后开始散焦，然后又自聚焦，如此作聚焦-散焦的周期性循环。但是，在光束自聚焦点附近，非零电场散度项的作用要强于非傍轴项。 |
| 关 键 词： | 自聚焦 矢量效应 非傍轴 |
Investigation on vector theory of beam self-focusing |
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| wen shuang-chun, fan dian-yuan. Investigation on vector theory of beam self-focusing[J]. High Power Laser and Particle Beams, 2001, 13. | |
| Authors: | wen shuang-chun fan dian-yuan |
| Affiliation: | 1. National Laboratory on High Power Laser and Physics,Shanghai;Institute of Optics and Fine Mechanics,the Chinese Academy of Sciences P.O.Box 800-211,Shanghai 201800,China |
| Abstract: | On the basis of the vector non-paraxial nonlinear Schrdinger equation, the property of self-focusing of intense laser beam is analytically investigated by a modulation theory. The role in self-focusing of the nonzero ▽·E term and that of nonparaxiality are compared. It is shown that both effects can arrest catastrophic collapse of the beam, leading to a periodic focusing-defocusing oscillation. For the aspect of collapse arresting, the nonzero ▽·E term is dominant over nonparaxiality. |
| Keywords: | self-focusing vector effect nonparaxialit |
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