| 相位失配法实现倍频稳定输出的模拟分析 |
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| 引用本文： | 邓青华,彭翰生,李明中,丁磊,王建军.相位失配法实现倍频稳定输出的模拟分析[J].强激光与粒子束,2007,19(3):394-398. |
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| 作者姓名： | 邓青华 彭翰生 李明中 丁磊 王建军 |
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| 作者单位： | 1. 中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900；2. 中国工程物理研究院 研究生部, 四川 绵阳 621900； 3. 中国工程物理研究院, 四川 绵阳 621900 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 对BBO晶体Ⅰ类相位匹配倍频过程和KTP晶体XY平面内的Ⅱ类相位匹配倍频过程进行数值模拟，结果表明：Ⅰ类和Ⅱ类相位匹配倍频过程，都可通过引入适量的相位失配量实现稳定倍频输出；随着相位失配量的增大，实现稳定倍频输出所需的晶体长度都变小，倍频稳定输出起伏变小，倍频转换效率有不同程度的下降；相对于XY平面内的Ⅱ类相位匹配倍频过程，BBO晶体的Ⅰ类相位匹配倍频过程对相位匹配偏离角更敏感，且稳定输出时倍频转换效率更低。
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| 关 键 词： | 相位失配 倍频 偏离角 BBO晶体 数值模拟 |
| 文章编号： | 1001-4322(2007)03-0394-05 |
| 收稿时间： | 2006/6/2 |
| 修稿时间： | 2006-06-02 |
Numerical simulation of stable second harmonic generation using phase mismatching |
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| DENG Qing-hua,PENG Han-sheng,LI Ming-zhong,DING Lei,WANG Jian-jun.Numerical simulation of stable second harmonic generation using phase mismatching[J].High Power Laser and Particle Beams,2007,19(3):394-398. |
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| Authors: | DENG Qing-hua PENG Han-sheng LI Ming-zhong DING Lei WANG Jian-jun |
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| Institution: | 1. Research Center of Laser Fusion, CAEP, P.O.Box 919-988, Mianyang 621900, China;2. Graduate School of China Academy of Engineering Physics, Mianyang 621900 China;3. China Academy of Engineering Physics, P.O.Box 919-1, Mianyang 621900, China |
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| Abstract: | A method is put forward to stabilize the second harmonic generation using phase mismatching. BBO type Ⅰ phase matching SHG course and KTP type Ⅱ phase matching course were simulated. Simulation results show that both type Ⅰ and type Ⅱ phase matching can get 2ω stable output by letting laser deviate from phase matching angle. With the increasement of the deviating angle, the length of the nonlinear crystal required to get stable 2ω output reduces, the fluctuation and the conversion efficiency of second harmonic generation output when the stable 2ω output is obtained become smaller. Compared with KTP type Ⅱ phase matching, BBO type Ⅰ phase matching is more sensitive to deviating angle and the conversion efficiency is smaller. |
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| Keywords: | Phase mismatching Second harmonic generation Deviating angle BBO crystal Numerical simulation |
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