图为焦点位置的光斑形态和能量分布曲线图，由图可以看出聚焦光斑的有效直径为430μm，光斑能量分布呈现近“高斯”状，这里与高斯激光源输入形成的聚焦光斑能量分布状态相近，无太大差异。为了和高斯型激光源输入所形成的环形光斑作比较，同样选取负离焦（F-2mm）位置处的光斑形态和能量分布的曲线作图

The figure shows the spot morphology and energy distribution curve at the focal position, which shows that the effective diameter of the spot is 430μm and the spot energy distribution is nearly "Gaussian", which is similar to the focused spot energy distribution formed by the Gaussian laser source input. In order to compare with the annular spot formed by the Gaussian laser source input, the same negative out-of-focus ( F-2mm) position for comparison with the annular spot.