介绍了一种基于分束一步测量宽带(200nm-1750nm)光谱响应的方法。对该测量方法的基本构成、系统定标与校准、基本测量原理等问题均进行了详细分析。给出了实验测量结果,并与日本滨松公司的标准数据进行了对比,测量的平均绝对误差和平均相对误差分别为ε=1.37mA/W和εr=0.89%。理论分析与实验结果十分吻合。 A method to measure the spectral response of broadband (200nm-1750nm) based on the splitting step is introduced. The basic structure of the measurement method, system calibration and calibration, the basic measurement principles and other issues were analyzed in detail. The experimental results are given and compared with the standard data of Hamamatsu Corporation. The average absolute error and the average relative error of measurement are ε = 1.37mA / W and εr = 0.89% respectively. Theoretical analysis and experimental results are in good agreement.