Numerical Simulation Of The Two-Dimensional Temperature Field Of High Power Laser In Static Working Condition By Finite Element Method

Base on the comprehensive analysis of the structure of the material, the heat source of the laser and thermal behavior of the high power laser, reasonable mathematical models have been set up for the two-dimensional temperature field of high power laser. In this work, the finite element method was used to simulate the the temperature field of high power laser with Matlab language.(1)Finding out the principles of the two-dimensional finite element method for temperature field simulation of high power laserThe profile and boundary conditions of the chip and submount of the high power laser is simply, we adopt the right-angled triangle cell to divide the submount and chip of the laser into triangular elements. Owing to the big difference in size of laser chip and submount, during the process of triangle division, the size of triangular elements between the chip and submount of laser were different in order to ensure the calculational precision.(2) To achieve the program of finite element, which apply to the two-dimensional temperature distribution of high power laserAccording to the diathermanous principles and the thoughts of finite element, the temperature distribution of the chip and the submount of high-power laser were simulated in the work. Finally the whole temperature matrix 'K' and the whole boundary condition matrix 'P' are calculated, then the temperature 'T' of every node was calculated.(3) To achieve the temperature distributionIn the program of finite element of the program simulated the two-dimensional temperature distribution of the longitudinal and tranverse directions of the chip and the submount of high-power laser. There were good consistency in this results with the correlative results of other business softwares, however, we can change the boundary conditions and input parameters expediently.This program is helpful and directive to analyze the the temperature distribution, design and install the system of cooling, improve the efficiency and life of high power laser.