Fig. 1. Schematic diagram of LD end-pumped Yb:YAG crystal laser experimental device

Fig. 2. LD end-pumped Yb:YAG crystal geometry diagram

Fig. 3. Three-dimensional crystal (a), (b) pump surface and (c) z axis section temperature field distribution diagrams

Fig. 4. Pump surface (a) and z axis section (b) isotherm distribution diagrams

Fig. 5. Comparison of temperature field distribution on z axis of Yb:YAG crystal at different Gauss order

Fig. 6. Comparison of temperature field distribution on z axis of Yb:YAG crystal with different spot radius

Fig. 7. Comparison of temperature field distribution on z axis of Yb:YAG crystal at different pump power

Fig. 8. Three-dimensional crystal stress distribution at the beginning of deformation (a) and after thermal stress stabilization; pump surface stress distribution at the beginning of deformation (c) and after thermal stress stabilization (d)

Fig. 9. Yb:YAG crystal pump surface thermal deformation distribution

Fig. 10. Thermal lens focal length varying with pump power