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为了解决高能激光总能量测量中所面临的抗激光损伤能力问题,设计了一种新型旋转式全吸收激光能量计,具有测量不确定度低、系统结构简单、环境适应性强等诸多优点,尤其在长时间出光的强激光能量测量中具有独特优势。光线追迹软件数值模拟结果表明激光辐照过程中能量逃逸率小于0.3%。利用有限元软件,模拟计算了连续激光辐照下能量吸收体的温度场分布和最高温升情况,给出了热吸收体最高温升与旋转速度的关系,分析了测温探测器安装深度对温度传感器测温曲线的影响。该旋转式能量计完全可以满足数十兆焦耳激光能量测量要求,也为更高能量的激光参数测试提供了一种全新的技术手段。
In order to solve the problem of resistance to laser damage in the measurement of total energy of high energy laser, a new type of rotary full absorption laser energy meter is designed. It has many advantages such as low measurement uncertainty, simple system structure and strong environment adaptability, especially It has the unique advantage of measuring intense laser energy over long periods of time. The numerical simulation results of ray tracing software show that the energy escape rate during laser irradiation is less than 0.3%. Using finite element software, the temperature field distribution and the maximum temperature rise of the energy absorber under continuous laser irradiation were simulated. The relationship between the maximum temperature rise and the rotation speed of the heat absorber was given. Temperature sensor temperature curve. The rotary energy meter can meet the tens of megajoules of laser energy measurement requirements, but also for higher energy laser parameter testing provides a new technical means.