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为了实现对高能密度激光束分布的测量,提出了高占空比蜂窝阵列结合分立隔热式能量探头的设计思想,研制出了一种耐激光辐照能力强、测量稳定的激光参数测量系统,该系统主要由蜂窝状阵列板、多路量热探头、多通道高速数据采集单元和相应数据处理软件组成。测量系统空间占空比为62%,光强分布测量不均匀性优于5%,测量动态范围达600倍,总能量测量不确定度优于8.5%。量热阵列测量系统的研制成功解决了大面积、大动态范围激光束总能量和光强分布绝对测量的技术难题,为激光束能量绝对分布测量提供了一种有效的手段。
In order to realize the measurement of high energy density laser beam distribution, the design idea of high duty cycle honeycomb array combined with discrete thermal insulation energy probe is proposed, and a laser parameter measurement system which is resistant to laser irradiation and stable in measurement is developed. The system consists of honeycomb array board, multi-calorimeter heat detector, multi-channel high-speed data acquisition unit and the corresponding data processing software. The duty cycle of the measurement system is 62%, the measurement of the light intensity distribution is better than 5%, the dynamic range of measurement is up to 600 times and the total energy measurement uncertainty is better than 8.5%. The development of the calorimetric array measurement system has successfully solved the technical problems of absolute measurement of the total energy and the light intensity distribution of the laser beam over a large area and a large dynamic range, and provides an effective measure for measuring the absolute energy distribution of the laser beam.