Influence of laser spacial profile on laser heating material

Different laser intensity distributions such as the beam with uniform profile, Gaussian, Super-Gaussian and flattened Gaussian beams are analyzed and compared. Under the same power and radius, the expressions of intensity distributions and beam fill factor varing with beam orders for these beams have been derived. In the heat conduction equation, laser beam with different special profiles as a surface heat source is included. Numerical calculations are performed to give the different thermal effects on a thin 30CrMnSiA metal slab induced by these beams.