在图中可以明显看到，使用单模激光器成形的熔覆层的尺寸要小于使用多模激光器成形的熔覆层的尺寸。在离焦量为（F±3mm）范围内，使用单模激光器可将熔覆层的成形宽度完全控制在1mm以内。

It is clear from the figure that the size of the clad layer formed with a single-mode laser is smaller than the size of the clad layer formed with a multimode laser. With a defocusing amount of (F±3 mm), the forming width of the clad layer can be completely controlled within 1 mm with a single-mode laser.