摘要
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1cm,有效探测尺寸为32cm、波长范围为300～1100nm。结果表明,该系统可用于最小脉冲宽度为10ns、重复频率为1～20kHz、动态范围为0.02～100μJ/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 432 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.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2013年第6期278-282,共5页
Chinese Journal of Lasers
基金
国防预研基金(22110702)资助课题
关键词
探测器
高重复频率
脉冲激光
时空分布
探测器阵列
远场
光斑
detectors, high repetition rate
pulsed laser
temporal-spatial distribution
detector array
far-field
beam profile
