在高功率激光二极管阵列(LDA)端面抽运大口径放大器研究中,高效均匀的抽运耦合系统是非常重要的.为了对各种抽运耦合系统进行比较,需要对抽运场分布实现量化评价.依据抽运场分布提出一套评价方法,利用沉积效率、平均抽运密度、调制度、起伏均方根(RMS)值、均匀区尺寸等五项指标对抽运场分布进行综合评价.评价方法中既有统计量(如沉积效率、起伏RMS值、平均抽运密度),又有极值量(如调制度),还有建立在起伏RMS值统计结果基础上且满足一定条件的均匀区尺寸指标,是一套比较综合的评价方法.还提出从抽运场中间小区域开始,逐步向外扩大面积计算各指标,最后得到这些指标的变化曲线,根据这些变化曲线可对不同的耦合系统进行分析比较.对三个抽运场分布进行实例分析,结果表明,提出的评价指标和计算方法能反映出抽运场分布的抽运能沉积效率和分布起伏等关键信息. In the high-power laser diode array (LDA) face pumping large-caliber amplifier research, efficient and uniform pumping coupling system is very important.In order to compare the various pumping coupling system, the need to quantify the distribution of the pumping field to evaluate Based on the distribution of pumping fields, a set of evaluation methods are put forward, and the distribution of pumping fields is evaluated comprehensively by five indexes: sedimentation efficiency, average pumping density, modulation degree, root mean square (RMS) value and uniform zone size. In the method, there are both statistic (sedimentation efficiency, fluctuating RMS value, average pumping density) and extremum (such as modulation degree), as well as a uniform region based on the statistic of undulating RMS value and satisfying certain conditions Size index is a set of more comprehensive evaluation method.It is also proposed to gradually expand the area calculation of the various indicators from the middle of the pumping area, and finally get the curve of these indicators, according to these curves can be different coupling system The results show that the proposed evaluation index and calculation method can reflect the pumping energy deposition efficiency and the distribution of the pumping field distribution Downs and other critical information.