The Relationship between Shading and Pulse Width when Using 60W Fiber Lasers on Metal Deep Carving Shown below is the relationship between shading roughness and time under different pulse widths. The arithmetical mean deviation of the profile Ra( μ m) Deep Carving on Aluminum Conclusion: 1. The larger the pulse width is, the more rough the deep carving shading is. 2. The roughness of shading increases initially and the decreases over time. 3. The shading keeps flat when choosing 100ns to deep carve. 4. Firstly, choose 350ns to deep carve and then choose 100ns to flatten shading. This way can not only assure the efficiency but also ma