| 晶体球中非相位匹配二次谐波产生及最佳聚焦条件 |
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| 引用本文： | 阎江,杨学林,李浩文,谢绳武,丁良恩.晶体球中非相位匹配二次谐波产生及最佳聚焦条件[J].光学学报,2000,20(12):596-1601. |
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| 作者姓名： | 阎江 杨学林 李浩文 谢绳武 丁良恩 |
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| 作者单位： | 1. 上海交通大学应用物理系，上海 200240
2. 华东师范大学量子光学开放实验室，上海 200062 |
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| 基金项目： | 上海市自然科学基金，国家教委博士点基金资助项目 |
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| 摘 要： | 晶体球法是近年来在国际上发展起来的一种测量非线性系数的新方法。根据聚焦高斯光束二次谐波产生的孔径方程理论，分析了晶体球中的第Ⅰ类非相位匹配二次谐波产生过程，讨论了晶体球中第Ⅰ类非相位匹配二次谐波最佳聚焦参数的选择。报道了LiNbO3晶体球中皮秒激光脉冲抽运的相位匹配二次谐波实验。所得结果与理论预计相符。
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| 关 键 词： | 晶体球 高斯光束 非相位匹配 二次谐波产生 |
| 收稿时间： | 1999/6/29 |
Non-Phase-Matched Second-Harmonic Generation and Optimum Focusing Condition in Crystal Sphere |
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| Yah Jiang,Yang Xuelin,Li Haowen,Xie Shengwu,Ding Liang' en.Non-Phase-Matched Second-Harmonic Generation and Optimum Focusing Condition in Crystal Sphere[J].Acta Optica Sinica,2000,20(12):596-1601. |
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| Authors: | Yah Jiang Yang Xuelin Li Haowen Xie Shengwu Ding Liang' en |
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| Abstract: | The sphere method is a newly developed technique for mesurement of nonlinear optical coefficients in crystals. Based on the theory of aperture function of the focused Gaussian beam SHG, the non phase matched (NPM) SHG process in a crystal sphere is analyzed, and the optimum focus condition of type Ⅰ NPM SHG is discussed. The experiment of NPM SHG in a LiNbO 3 crystal sphere pumped with a pico second laser pulse is reported. The experimental results agree well with the theoretical prediction. |
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| Keywords: | crystal sphere Gaussian beam non phase matching second harmonic generation |
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