Numerical calculation of distribution of 3D temperature and thermal stress for Nd:YAG square slice laser

作者：Li Gang^*; Feng Guo Ying; Li Wei; Yang Huo Mu; Huang Yu; Zhou Shou Huan

来源：High Power Laser and Particle Beams, 2008, 20(4): 557-562.

• 3-D temperature distribution
• Disk lasers
• Finite differencing
• Finite element method FEM
• Heat-stress
• Nd: YAG
• Numerical calculations
• Pump-light
• Slice laser
• Stress distributions
• Super-Gaussian
• The iterative method of finite-difference
• Thermal conductivity

In this paper, based on the iterative method of finite-difference, 3-D instantaneoos and stable temperature distribution of square slice in the Nd:YAG disk laser under super-Gaussian pump light are calculated. Using the thermal balance differential equation and boundary condition of thermal elasticity body, 3-D thermal stress distribution from the 3-D temperature distribution was obtained. The iterative method of finite-difference avoids the problem of solving the super-large sparseness matrix, thus occupies less random memory and calculates faster than the normal finite-element method. The calculated results of temperature and thermal stress distribution in Nd:YAG slice are coincident with the experimental ones.

• 出版日期2008
• 单位四川大学