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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:41 |
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Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
The general model of the thermal field distributions
in solids under multiple laser irradiation
Authors:
Mihai Oane, Andrei Popescu, Constantin Oproiu, Ion N. Mihailescu, Rares V. Medianu,
Monica Nemtanu, Mirela Brasoveanu, Ovidiu Pacala1, Mirela Pacala1, Andreea Predoiu1
Affiliation:
National Institute for Laser, Plasma and Radiation Physics,
Bucharest-Magurele, Romania
1 YARC-Design Magurele Romania
E-mail
oane.mihai@gmail.com
Keywords:
Temperature field, heat equation, solids, laser beam
Abstract:
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 laser beams propagation are supposed to be along Cartesian coordinate axes. The spatial distribution of 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-solid system whose interaction can be described by the generalized Beer law. We can include in the model also the multi-photons 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 one, respectively two CO2 laser beams.
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