Finite element analysis on thermal effect of heat capacity laser disk

Considering inhomogeneous heat generation and real heat-transfer conditions, the transient temperature and thermal stress distribution in disk of heat capacity laser pumped by high power LDA are simulated and analyzed by use of finite element methods. Optical distortions and birefringence are computed subsequently. The results indicate that the magnitude of the thermal effect in heat capacity disk laser are seriously underestimated in the condition of the medium not being full-aperturedly pumped. Simulation results also indicate that for the same pump intensity, the temperature and thermal stress distribution are not only related with the medium geometry and the special distribution of pump intensity but also related with filling factor of pump area versus hard aperture of disk. When the f