| 超短脉冲3次谐波转换研究 |
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| 引用本文： | 韩耀锋,李琨,张彬,蔡邦维,李恪宇,朱启华.超短脉冲3次谐波转换研究[J].四川大学学报(自然科学版),2006,43(3):573-578. |
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| 作者姓名： | 韩耀锋 李琨 张彬 蔡邦维 李恪宇 朱启华 |
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| 作者单位： | 1. 四川大学电子信息学院,成都,610064
2. 中国工程物理研究院激光聚变研究中心,四川,绵阳,621900 |
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| 基金项目： | 四川省青年科技基金(05ZQ026-013);; 四川省学术和技术带头人培养资金(2200306) |
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| 摘 要： | 针对由三阶非线性效应引起的I类角度失谐3次谐波转换进行了研究,讨论了群速度失配、自相位调制和交叉相位调制、晶体厚度以及失谐角度对3倍频光脉冲波形、频谱及转换效率的影响.研究结果表明:群速度延迟使转换效率下降,3倍频光脉冲展宽;自相位调制及交叉相位调制会降低转换效率,使3倍频光脉冲形状发生畸变;晶体厚度对3倍频光脉冲的展宽和转换效率均有较大影响;合适的失谐角度可有效地提高转换效率.
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| 关 键 词： | 群速度延迟 自相位调制 交叉相位调制 失谐角度 飞秒激光 |
| 文章编号： | 0490-6756（2006）03-0574-05 |
| 收稿时间： | 2005-10-23 |
| 修稿时间： | 2005-10-23 |
Study on Third-Harmonic Generation of Femtosecond Pulse |
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| HAN Yao-feng,LI Kun,ZHANG Bin
,CAL Bang-wei,LI ke-yu,ZHU Qi-hua.Study on Third-Harmonic Generation of Femtosecond Pulse[J].Journal of Sichuan University (Natural Science Edition),2006,43(3):573-578. |
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| Authors: | HAN Yao-feng LI Kun ZHANG Bin CAL Bang-wei LI ke-yu ZHU Qi-hua |
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| Institution: | College of Electronic information; Sichuan University,College of Electronic information; Sichuan University,College of Electronic information; Sichuan University,College of Electronic information; Sichuan University,Research Center of Laser Fusion; CAEP; P.O.Box 919-988,Research Center of Laser Fusion; CAEP; P.O.Box 919-988 |
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| Abstract: | The type-I phase-matched third-harmonic generation induced by third-order nonlinear optical process has been studied.The effects of group-velocity mismatch,self-and cross-phase modulation,the thickness of crystal on pulse shape,spectrum distribution and conversion efficiency of third-harmonic pulse have been discussed.The results indicate that group-velocity mismatch reduces the tripling efficiency and broadens the third-harmonic pulse,self-and cross-phase modulation not only reduce the tripling efficiency,... |
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| Keywords: | group-velocity mismatch self-and cross-phase modulation detuned angle femtosecond pulse |
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