| 连续位相板均方根梯度对焦斑匀滑特性的影响 |
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| 引用本文： | 冯友君,林中校,张蓉竹.连续位相板均方根梯度对焦斑匀滑特性的影响[J].物理学报,2011,60(10):104202-104202. |
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| 作者姓名： | 冯友君 林中校 张蓉竹 |
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| 作者单位： | 四川大学电子信息学院,成都 610065 |
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| 基金项目： | 国家重大科学研究计划(批准号: JG2010099)资助的课题. |
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| 摘 要： | 为满足惯性约束聚变(ICF)系统中,对焦斑均匀辐照的条件,研究了连续位相板(CPP)面形特征对远场光斑质量的影响.从波动光学和几何光学两个不同的角度建立分析模型,并利用均方根梯度这一参数将其统一起来.利用所建立的分析模型,通过数值计算研究了CPP面形均方根梯度对低频畸变光束的匀滑效果.结果表明:随着CPP均方根梯度增大,匀滑后的远场焦斑半径增大;光束顶部不均匀性先很快减小,再缓慢降低,最后趋于不变,可见CPP对光束的匀滑效果明显;束匀滑过程对能量利用率的影响先几乎不变,然后逐渐减小.当CPP的相关长度不变,均方根梯度在0.2-0.8 wave/mm范围内时,光斑尺寸、光束顶部不均匀性及能量利用率都在较好的范围.
关键词：
连续位相板
均方根梯度
光束匀滑
聚焦光斑
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| 关 键 词： | 连续位相板 均方根梯度 光束匀滑 聚焦光斑 |
| 收稿时间： | 4/7/2011 12:00:00 AM |
| 修稿时间： | 5/9/2011 12:00:00 AM |
The influence of root mean square phase gradient of continuous phase plate on smoothing focal spot |
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| Feng You-Jun,Lin Zhong-Xiao and Zhang Rong-Zhu.The influence of root mean square phase gradient of continuous phase plate on smoothing focal spot[J].Acta Physica Sinica,2011,60(10):104202-104202. |
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| Authors: | Feng You-Jun Lin Zhong-Xiao and Zhang Rong-Zhu |
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| Institution: | College of the Electronics and Information Engineering, Sichuan University, Chengdu 610064, China;College of the Electronics and Information Engineering, Sichuan University, Chengdu 610064, China;College of the Electronics and Information Engineering, Sichuan University, Chengdu 610064, China |
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| Abstract: | In order to satisfy uniform irradiation requirement in inertial confinement fusion(ICF) system,the influence of surface characteristics of continuous phase plate on beam quality is studied in this paper.Based on wave optics and geometrical optics,theoretical analysis model is established,respectively.And the parameter,root mean square gradient,is used to unify both theoretical models.Meanwhile,the smoothing effects of root mean square phase gradient of continuous phase plate on laser beam with low-frequency... |
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| Keywords: | continuous phase plate(CPP) root mean square phase gradient(GRMS) beam smoothing focal spot |
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