Theory of Metal Surface Destruction under the Action of Laser Radiation

摘要

The efficiency of technologies related to the laser processing of materials is closely associated with processesof radiation interaction with a substance in the narrow channel of the laser cut. In this paper, the problem of describing the shape of a surface formed as a result of the laser cutting of metals by an intense radiation flux is studied. The effect of the Gaussian beam polarization on the radiation absorption factor with allowance for the spatial orientation of the beam incidence plane is analyzed. We show for the first time that it is most efficient to use the elliptic polarization of the radiation, which possesses a quite certain ratio of the ellipse semiaxes and is oriented along the beam direction. A calculation model for the laser cut surface is proposed. The model takes into account the multiple reflection of the focused laser radiation in the cut channel.