| 椭圆高斯光束在自散焦介质中的诱导聚焦 |
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| 引用本文： | 李华刚,郭旗. 椭圆高斯光束在自散焦介质中的诱导聚焦[J]. 光学学报, 2005, 25(4): 20-524 |
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| 作者姓名： | 李华刚 郭旗 |
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| 作者单位： | 广东教育学院物理系,广州,510303;华南师范大学传输光学实验室,广州,510631 |
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| 基金项目： | 国家自然科学基金(10474023)，广东省自然科学基金面上项目(301516)，重点项目(04105804)资助课题 |
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| 摘 要： | 研究了在自散焦介质中诱导光束聚焦过程中椭圆高斯光束对光束聚焦的影响。通过数值计算讨论了在不同初始抽运光束振幅、初始光束间距和波长比情况下椭圆高斯光束对信号光束聚焦的影响。影响光束聚焦过程的方程参量和初始条件共有6个，即两光束波长比(方程参量)、抽运光束和信号光束的初始振幅、两光束初始中心间距和两光束X、Y初始束宽比。采用此理论模型验证了Hickmann在1992年得出的实验结果，数值计算结果表明理论结果能够和实验结果定量地吻合。
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| 关 键 词： | 非线性光学 诱导光束聚焦 非线性折射率 交叉相位调制效应 自散焦介质 |
| 收稿时间： | 2004-05-13 |
Induced Focusing of Gaussian Elliptic Beam in Self-Defocusing Media |
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| Li Huagang,Guo Qi. Induced Focusing of Gaussian Elliptic Beam in Self-Defocusing Media[J]. Acta Optica Sinica, 2005, 25(4): 20-524 |
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| Authors: | Li Huagang Guo Qi |
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| Affiliation: | Li Huagang1Guo Qi2 1 Department of Physics,Guangdong Institute of Education,Guangzhou 510303 2 Laboratory of Light Transmission Optics,South China Normal University,Guangzhou 510631 |
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| Abstract: | The effect of elliptic Gauss beam on the focusing of the signal beam under the other different parameters is discussed. There are six parameters, i.e. the wavelength ratio of the pump beam to the signal, the initial amplitudes of a pump beam and a signal beam, the initial separation between the beams' centers, and the ratio of the initial beam width of the X and Y of the pump to that of the signal, which influence the induced focusing of the signal optical beam. The numerical simulations are in good agreement with the experimental results obtained by Hickmann in 1992. |
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| Keywords: | nonlinear optics induced focusing of optical beams nonlinear refractive index cross-phase modulation effect self-defocusing medium |
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