基于光压原理的大功率激光功率测量

High-power laser power measurement based on principle of light pressure

大功率激光功率测量常用量热法,但溯源复杂。介绍了具有较高测量精度的基于光压原理的大功率激光功率测量方法,设计了利用1/10^(5)精度天平大功率激光测量实验,测试了基于GaAs半导体材料制作的反射镜的反射率及损伤阈值,确定了基于GaAs半导体材料反射镜的相关性能。得到了普通实验室条件下的功率测量重复性及线性,验证了1/10^(5)精度天平用于大功率激光测量的可行性。通过实验结果结合理论计算,得出利用1/10^(5)精度天平的光压测量功率的测量上限可以达到3×10^(4)W以上。

The calorimetry is commonly used for high-power laser power measurement,but the traceability is complicated.The high-power laser power measurement method based on principle of light pressure with higher measurement accuracy was introduced,the measurement experiment using a balance with an accuracy of 1/10^(5) was designed,the reflectivity and damage threshold of the mirror based on GaAs semiconductor materials were tested,and the properties of mirrors based on GaAs semiconductor materials were determined.Under ordinary laboratory conditions,the power measurement repeatability and linearity were obtained,and the feasibility of balance with an accuracy of 1/10^(5) for high-power laser measurement was verified.Through the experimental results combined with theoretical calculations,it is concluded that the upper limit of the measurement power of light pressure can reach more than 3×10^(4) W by using the balance with an accuracy of 1/10^(5).