中国激光, 2014, 41 (s1): s108001, 网络出版: 2014-07-03  

大口径片状放大器增益均匀性测量方法研究

Research on the Measurement Methods for the Gain Distribution Uniformity of Large Aperture Slab Amplifiers
作者单位
中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
摘要
利用大口径高通量实验平台,同时使用科学光电耦合器件(CCD)和哈特曼测量了大口径片状放大器增益均匀性,并针对这两种测量方法提出了几种相应的处理方法,通过数值计算和分析,详细比较了不同测量方法和后期处理方法对增益均匀性产生的影响,确定了两种测量方法及其后期处理方法的有效性。结果表明,使用科学CCD测量增益均匀性,数据处理时采用多发次求平均再匀滑的方法既可规避测量产生的随机性,又进一步减小了增益分布的空间噪音;使用哈特曼测量增益均匀性,尽量使用点阵超过50×50的哈特曼,微透镜阵列点阵数量过少会降低增益塌边程度。
Abstract
Utilizing the scientific charge-coupled device (CCD) and Hartmann test system, the gain distribution uniformity of large aperture slab amplifiers is measured on the integration test bed and processing methods are put forward for these two methods. The effects of various measuring methods and post-processing methods on gain uniformity are compared in detail by numerical calculation and analysis. The results show that the measuring randomness can be avoided and spatial noise of gain distribution can be minimized when measuring the gain uniformity by the scientific CCD with multi-shot averaging smoothed method. The results also show that less lattice number reduces the gain roll-off at the edges of the aperture when measuring the gain uniformity by Hartmann, which indicates a lattice number of over 50×50 is proposed.

郝欣, 陈林, 陈远斌, 刘建国, 刘勇, 赵军普, 梁樾, 唐军, 李森, 陈德怀. 大口径片状放大器增益均匀性测量方法研究[J]. 中国激光, 2014, 41(s1): s108001. Hao Xin, Chen Lin, Chen Yuanbin, Liu Jianguo, Liu Yong, Zhao Junpu, Liang Yue, Tang Jun, Li Sen, Chen Dehuai. Research on the Measurement Methods for the Gain Distribution Uniformity of Large Aperture Slab Amplifiers[J]. Chinese Journal of Lasers, 2014, 41(s1): s108001.

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