| 晶体级联方式的宽带三倍频方案分析 |
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| 引用本文： | 李琨,李恪宇,张彬,王成程,马驰.晶体级联方式的宽带三倍频方案分析[J].强激光与粒子束,2006,18(8):1282-1286. |
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| 作者姓名： | 李琨 李恪宇 张彬 王成程 马驰 |
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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： | 国家高技术研究发展计划(863计划);四川省学术与技术带头人培养基金 |
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| 摘 要： | 讨论了入射基频光频谱宽度、两块和频晶体失谐角对KDP晶体Ⅰ/Ⅱ/Ⅱ类角度失谐级联方式的三倍频光功率谱分布的影响，分析了影响三倍频效率的因素。研究结果表明，第二块和频晶体得到的三倍频光的功率谱分布与基频光功率谱分布及失谐角有关，三倍频光频谱宽度近似为基频光的3倍，采用该方案的三倍频可有效抑制由于基频光时间相位调制导致的三倍频光强随时间分布的不均匀，并能有效提高大带宽条件下的三倍频转换效率。同时，采用该方案的三倍频，对级联的两块和频晶体厚度及失谐角调整精度要求不高，在实验上有很大的可操作性。
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| 关 键 词： | 宽带激光 晶体级联 功率谱分布 宽带三倍频 时间相位调制 |
| 文章编号： | 1001-4322(2006)08-1282-05 |
| 收稿时间： | 2005-08-31 |
| 修稿时间： | 2005-11-08 |
Analysis of third harmonic generation of broadband laser using cascaded crystals |
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| LI Kun,LI Ke-yu,ZHANG Bin,WANG Cheng-cheng,MA Chi.Analysis of third harmonic generation of broadband laser using cascaded crystals[J].High Power Laser and Particle Beams,2006,18(8):1282-1286. |
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| Authors: | LI Kun LI Ke-yu ZHANG Bin WANG Cheng-cheng MA Chi |
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| Institution: | 1. College of Electronic Information, Sichuan University, Chengdu 610064, China;2. Research Center of Laser Fusion, CAEP, P.O. Box 919-988, Mianyang 621900, China |
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| Abstract: | By using one type Ⅰ doubling and two type Ⅱ tripling KDP crystals in quadrature, the influence of the bandwidth of the fundamental field and the detuning angles of the mixers on the power spectrum of the third harmonic field has been discussed. The factors influencing the conversion efficiency of the third harmonic field has also been analyzed. It is shown that the distribution of the power spectrum of the third harmonic field depends on the bandwidth of the input fundamental field and the detuning angles of the mixing crystals. The bandwidth of the third harmonic field is nearly 3 times that of the input fundamental field. Furthermore, the non-uniformity of the temporal profile of the third harmonic field induced by the temporal modulation of the fundamental field can be improved and th |
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| Keywords: | Broadband laser Cascaded crystals Power spectrum distribution Broadband third harmonic generation Temporal modulation |
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