远场激光光斑测量是研究高功率激光大气传输效应的有效方法，同时也是测试分析激光系统远距离瞄准能力的主要手段。设计了一种基于光电探测器阵列的高重复频率脉冲激光光斑分布探测阵列，实现了到靶激光总功率和光斑时空分布的定量测量。该探测阵列由297路Si-PIN光电探测器单元组成，其中心区域空间分辨力为1 cm，有效探测尺寸为32 cm、波长范围为300～1100 nm。结果表明，该系统可用于最小脉冲宽度为10 ns、重复频率为1～20 kHz、动态范围为0.02～100 μJ/cm2的脉冲光斑测量。

Measuring far-field laser beam profile is an effective way to study the atmospheric transmission effects of high power laser and evaluate the pointing capability of high power laser system in a long distance. A laser beam profiler based on detector array is developed to measure the far-field beam intensity and temporal-spatial distribution of the high-repetition-rate pulsed laser beam, and the image of the far-field beam profile is reconstructed with the bilinear interpolation method. The detector array is composed of 297 Si-PIN photodiode detectors, with the spatial resolution of 1 cm in the central region, an effective sensitive area of 32 cm, and response wavelength between 300 nm and 1100 nm. The beam profiler is capable of measuring far-field beam profile of 1～20 kHz repetition rate pulsed laser, with minimal detectable pulse width of 10 ns, and dynamic range of energy density of 0.02～100 μJ/cm2.