| 光束自聚焦的矢量理论研究 |
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| 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(1):1-4. |
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| 作者姓名： | 文双春 范滇元 |
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| 作者单位： | 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 201800 |
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| 基金项目： | 国家863惯性约束聚变领域资助课题!（863－416－5） |
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| 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。
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| 关 键 词： | 自聚焦 矢量效应 非傍轴 |
| 文章编号： | 1001—4322（2001）01—0001—04 |
| 收稿时间： | 2000/7/8 |
| 修稿时间： | 2000年7月8日 |
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(1):1-4. |
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| Authors: | WEN Shuang-chun FAN Dian-yuan |
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| Institution: | 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 |
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| Abstract: | On the basis of the vector non-paraxial nonlinear Schrodinger 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. |
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| Keywords: | self-focusing vector effect nonparaxiality |
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