基于相位调制的单次曝光波前测量在高功率激光驱动器中的应用

发布时间：2018-01-01 09:30

本文关键词：基于相位调制的单次曝光波前测量在高功率激光驱动器中的应用　出处：《中国激光》2016年01期 　论文类型：期刊论文

【摘要】：基于相位调制的迭代算法被用于高功率激光驱动器的波前在线测量和大口径光学元件的离线检测,该算法只需要单幅衍射光斑和一块分布已知的随机相位板,利用图形处理器(GPU)硬件加速后可在30 s以内完成迭代计算,并且集成后结构紧凑,基本可放置于高功率激光驱动器的任意位置。基于该方法完成了焦斑预测和对比实验,在现有高功率激光驱动器中对种子光的波前分布进行了在线测量,同时实现连续相位板(CPP)的离线检测。相关实验表明,该算法能够用于解决高功率激光驱动器中焦斑预测、波前在线恢复和大口径光学元器件检测的问题,具有广泛的适用性,适用于高功率激光驱动器的波前测控系统以及作为元件检测的新方法,对于激光驱动器的发展具有十分重要的实际意义。
[Abstract]:The iterative algorithm based on phase modulation is used to measure the wavefront of high power laser driver and to detect the large aperture optical element offline. The algorithm only needs a single diffraction spot and a random phase plate with known distribution. With GPU hardware acceleration, the iterative calculation can be completed within 30 seconds, and the integrated structure is compact. It can be placed in any position of high power laser driver. Based on this method, focal spot prediction and contrast experiment are completed, and the wave front distribution of seed light is measured online in the existing high power laser driver. At the same time, the off-line detection of CPP is realized. The experiments show that the algorithm can be used to solve the problem of focal spot prediction in high power laser driver. The problems of wave front on-line recovery and large aperture optical component detection are widely applicable to the wave front measurement and control system of high power laser driver and a new method of component detection. It has very important practical significance for the development of laser driver.
【作者单位】：中国科学院上海光学精密机械研究所;
【基金】：中科院百人计划(54JR11043301)
【分类号】：TN24
【正文快照】： 1引言高功率激光系统作为实现惯性约束聚变(ICF)的重要平台,在能源问题、战略安全和高密度物理等研究领域具有重要的意义,其对靶室焦斑大小有着严格的要求,比如美国国家点火装置(NIF)设计要求是将1.8 MJ的总能量注入到600μm大小的激光聚变靶丸当中,并且在焦平面,不存在连续相

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