| 高功率超高斯光束传输的非线性补偿研究 |
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| 引用本文： | 赵华君, 朱启华, 冯国英, 等. 高功率超高斯光束传输的非线性补偿研究[J]. 强激光与粒子束, 2004, 16(03). |
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| 作者姓名： | 赵华君 朱启华 冯国英 刘文兵 张清泉 马再如 陈建国 |
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| 作者单位： | 1.四川大学 光电科学技术系,四川 成都61 0064;;;2.中国工程物理研究院 激光聚变研究中心,四川 绵阳 621 900 |
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| 摘 要： | 分析了高功率超高斯光束在非线性介质中传播的基本理论，用分步傅里叶变换方法计算了10阶超高斯光束在非线性介质内的传输过程，最后采用具有负折射率系数的非线性介质作为补偿材料，对不同的补偿方式进行了对比分析。研究表明，四种补偿方式均可以大大减小光束的B积分，有效防止超高斯光束边缘的非线性增长，降低光束的小尺度自聚焦，同时选用后补偿作为最佳补偿方式。
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| 关 键 词： | 非线性补偿 超高斯光束 B积分 小尺度自聚焦 |
Compensation of nonlinear self focusing in propagation of high power super Gaussian beams |
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| zhao hua jun, zhu qi hua, feng guo ying, et al. Compensation of nonlinear self focusing in propagation of high power super Gaussian beams[J]. High Power Laser and Particle Beams, 2004, 16. |
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| Authors: | zhao hua jun zhu qi hua feng guo ying liu wen bing zhang qing quan ma zai ru chen jian guo |
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| Affiliation: | 1. Department of Opto Electronics,Sichuan University,Chengdu 610064,China;;;2. Research Center of Laser Fusion,CAEP,P.O.Box 919 988,Mianyang 621900,China |
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| Abstract: | The basic theory of a beam passing through the nonlinear medium is analysed in this paper, and the process of a ten step high power supper Gaussion beam passing through the nonlinear medium is calculated with the FFT. A negative nonlinear refractive index material was used as the compensating medium to compare different compensation methods. Studies suggest compensation can decrease B integral along the beam direction in a nonlinear medium, and can cancel the self focusing of beams greatly. It can also avoid the nonlinear increase on the edges of super Gaussian beams effectively. The compensation after nonlinear medium was selected as the idea compensating methods. |
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| Keywords: | nonlinear compensation super gaussian beams b integral small scale self focusing |
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