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The General Model of the Thermal Field Distributions in Solids Under Multiple Laser Beam Irradiation
M. Oane, M. Nemtanu and C. Oproiu

The interaction of solids with multiple electromagnetic fields is of great importance in quantum electronics. In this paper the behaviour of the heat transfer in a solid irradiated by multiple laser beams is investigated. The directions of propagation of the laser beams are supposed to be along Cartesian co-ordinate axes. The spatial distribution of the laser beams is supposed to be a sum of decoupled transversal modes: (m,n)-for the first laser beam, (p,q)-for the second laser beam, (r,s)-for the third laser beam. The model is valid for any laser beam-solid system whose interaction can be described by the generalized Beer law. We can include in the model also multi-photon absorption. Calculations are performed using the integral transform method [1, 2]. The spatial and temporal temperature field distributions are plotted considering a real situation in which ZnSe samples are continuously irradiated with two CO2 laser beams.

Keywords: Temperature field, heat equation, solids, laser beam

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