| 二次谐波转换中的衍射和离散效应 |
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| 引用本文： | 何钰娟,魏晓峰,蔡邦维,马驰,张彬,袁静. 二次谐波转换中的衍射和离散效应[J]. 强激光与粒子束, 2000, 12(2): 201-203 |
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| 作者姓名： | 何钰娟 魏晓峰 蔡邦维 马驰 张彬 袁静 |
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| 作者单位： | 1. 四川大学光电系，成都，610064; 2. 中物院核物理与化学研究所激光技术工程部，四川绵阳，919-219信箱，621900 |
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| 基金项目： | 国家863惯性约束聚变领域资助课题!( 863 -4 16-2 -1.12) |
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| 摘 要： | 以I类匹配KDP晶体中高斯光束的二倍频为例，对衍射和离散两种因素对二次谐波转换效率的影响作数值模拟计算。结果表明，衍射的影响非常小。当入射超高斯光束口径非常小时，离散效应的存在将大大降低倍频转换效率。随着入射光束口径的增大，离散效应的影响相应地减小，甚至可以忽略。
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| 关 键 词： | 离散 衍射 高斯光束 二次谐波转换 |
| 收稿时间： | 1900-01-01; |
THE DIFFRACTION AND WALKOFF IN THE SECOND HARMONIC GENERATION |
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| HE Yu-juan,WEI Xiao-feng,CAI Bang-wei,MA Chi,ZHANG Bin,YUAN Jing. THE DIFFRACTION AND WALKOFF IN THE SECOND HARMONIC GENERATION[J]. High Power Laser and Particle Beams, 2000, 12(2): 201-203 |
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| Authors: | HE Yu-juan WEI Xiao-feng CAI Bang-wei MA Chi ZHANG Bin YUAN Jing |
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| Abstract: | Taking the second harmoic generation of Gaussian beam in a KDP crystal of type I matching for example, the effects of diffraction and walkoff to doubling conversion efficiency have been worked out. The result indicates that the effect of diffraction is very small and can even be neglected. When the input Gaussian beam size is very small, the walkoff is very deleterious to doubling conversion. Along with the enlarging of beam size, the effect of walkoff is much smaller. Finally it can even be neglected. |
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| Keywords: | diffraction walkoff Gaussian beam second harmonic generation |
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