Abstract
This paper concerns mathematical modelling of caustics of solid state laser YAG type with the disk active medium. The heat source model is developed on the basis of interpolation algorithms using geostatistical kriging method. The real laser beam power distribution and caustics are taken into account in the model. Measurements of laser beam power distribution and diameter of the laser beam spot for different focusing are performed using UFF100 analyzer. Yb:YAG laser emitted by Trumpf laser head D70 is used in the experiment. Presented results include the comparison of experimentally determined laser power intensity distribution and caustic with results obtained by developed interpolation model.
Highlights
Changes in the focal length of focusing lens in the optical system of solid state laser changes the laser spot diameter and the laser beam power intensity distribution
This paper presents interpolation algorithms allowing a precise description of Yb:YAG laser power intensity distribution and its caustic
Kriging method [6,7,8] is used in this study in the form of point Kriging for the interpolation of laser beam heat source power distribution
Summary
Changes in the focal length of focusing lens in the optical system of solid state laser changes the laser spot diameter and the laser beam power intensity distribution. In mathematical and numerical models of laser beam heat source power distribution only specific laser beam spot diameter is adopted, omitting the beam caustics. The laser beam intensity distribution models assumed in numerical analysis significantly differ from real Yb:YAG laser profile, obtained through experimental research [4, 5]. This paper presents interpolation algorithms allowing a precise description of Yb:YAG laser power intensity distribution and its caustic. Elaborated models take into account the real laser power distribution obtained in experimental research made using TruDisk 12002 laser. Kriging method [6,7,8] is used in this study in the form of point Kriging for the interpolation of laser beam heat source power distribution
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