| 利用分形法表征光学元件中高频相位畸变 |
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| 引用本文： | 黄晚晴,张颖,王文义,耿远超,刘兰琴.利用分形法表征光学元件中高频相位畸变[J].强激光与粒子束,2013,25(5):1171-1175. |
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| 作者姓名： | 黄晚晴 张颖 王文义 耿远超 刘兰琴 |
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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 621 900 |
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| 摘 要： | 针对神光Ⅲ主机装置使用的光学元件，基于分形理论，分析中高频相位畸变的统计分布特征，指出其满足分数布朗随机场，并利用结构函数法对分形维数进行计算，统计结果显示，大口径钕玻璃片的分形维数在2.34~2.43之间。利用局部稳态的随机中点位移法，提出一种新的表征光学元件相位的方法，将分形维数作为参数，可衡量中高频相位畸变，对高功率激光光学元件的评价有参考意义。
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| 关 键 词： | 光学元件 相位畸变 分形法 分数布朗随机场 钕玻璃 |
| 收稿时间： | 2012-11-20; |
Evaluating middle-high frequency phase distortion of optics by fractal method |
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| Huang Wanqing,Zhang Ying,Wang Wenyi,Geng Yuanchao,Liu Lanqin.Evaluating middle-high frequency phase distortion of optics by fractal method[J].High Power Laser and Particle Beams,2013,25(5):1171-1175. |
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| Authors: | Huang Wanqing Zhang Ying Wang Wenyi Geng Yuanchao Liu Lanqin |
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| Affiliation: | 1.Research Center of Laser Fusion,CAEP,P.O.Box 919-988,Mianyang 621900,China |
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| Abstract: | Based on the fractal theory, this paper analyzed statistical distribution features of middle-high frequency phase distortion of the optics for Shenguang-Ⅲ laser facility. The middle-high frequency phase distribution is found to be consistent with the model of fractional Brownian random field. The fractal dimension was calculated by structure function. The fractal dimension of large-aperture neodymium-doped phosphate amplifier glass is distributed between 2.34 and 2.43. A method of phase simulation by random midpoint-displacement was presented. In this method, the fractal dimension can be viewed as a parameter for estimating phase distortion, which helps to evaluate the high laser optics. |
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| Keywords: | phase distortion fractal method fractional Brownian random field neodymium-doped phosphate amplifier glass |
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