【摘要】 针对“神光 ”精密化的要求 ,采用半波片和偏振片组合衰减装置精确控制光束能量 ,达到能量平衡。简要论述了半波片组合衰减器的工作原理。采用独特的方法 ,对高精度光电探头和半波片的特性进行了检测。在此基础上 ,运用自动控制技术进行智能调节 ,实现了闭环自动控制模拟实验 ,达到了均方根为 2 %的激光能量控制精度。更多还原

【Abstract】 To meet the need of precision for high power laser system, SHENGUANG Ⅱ, assembly of half wave plate and polarizers is used to precisionly control the beam energy. The principles of attenuator assembly of half wave plate and polarizers are discussed briefly. The characteristics of high precision photoelectric detector and half wave plate are measured by a special way. Then, automation technology is applied to intelligent adjustment. An energy precision of 2%(rms) is obtained in closed loop automation simulation experiments.更多还原