| 连续相位板束匀滑容差能力分析 |
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| 引用本文： | 吕晨,张大志,张蓉竹.连续相位板束匀滑容差能力分析[J].强激光与粒子束,2013,25(3):627-632. |
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| 作者姓名： | 吕晨 张大志 张蓉竹 |
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| 作者单位： | 1.四川大学 电子信息学院, 成都 61 0065 |
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| 基金项目： | 国家高技术发展计划项目 |
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| 摘 要： | 在惯性约束聚变系统中，改进G-S算法设计的连续相位板能够对波前发生畸变的激光进行束匀滑处理，以改善远场分布。由于连续相位板对不同畸变状态的波前进行处理后的效果不一样，因此针对连续相位板的束匀滑容差能力进行了系统分析。鉴于畸变光束的传输特性，采用波前均方根梯度来量化波前畸变量，定量计算了不同畸变光经过匀滑处理后的远场光强分布情况。并比较了不同入射畸变光通过连续相位板后的远场焦斑顶部均匀性，结果表明:当入射波前畸变的均方根梯度小于0.32 wave/mm 时，连续相位板具有很好的束匀滑效果。
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| 关 键 词： | 连续相位板 容差 波前畸变 均方根梯度 束匀滑 |
| 收稿时间： | 2012-07-13 |
Analysis of beam smoothing tolerance ability of continuous phase plate |
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| Lü Chen,Zhang Dazhi,Zhang Rongzhu.Analysis of beam smoothing tolerance ability of continuous phase plate[J].High Power Laser and Particle Beams,2013,25(3):627-632. |
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| Authors: | Lü Chen Zhang Dazhi Zhang Rongzhu |
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| Affiliation: | 1.School of Electronics and Information Engineering,Sichuan University,Chengdu 610065,China |
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| Abstract: | In the inertial confinement fusion (ICF) system, continuous phase plate (CPP) designed by improved G-S algorithm can be used to improve the far-field distribution of distorted wave-front. Since the smoothing results of CPP for different distorted wave-fronts are different, the smoothing tolerance ability of CPP is analyzed systematically. According to the transmission characteristics of the distorted laser beams, root mean square (RMS) gradient of wave-front is used to quantify the wave-front distortion. And the far-field intensity distributions of different distorted beams which have translated through CPP are calculated by the numerical method. By comparing the uniformity of far-field focal spot after smoothing by CPP, a conclusion can be gotten that when the RMS gradient is under 0.32 wave/mm, CPP has good beam smoothing ability. |
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