Fig. 1. Structure charts of crystals. (a) Bonding crystal; (b) single Nd∶YAG crystal

Fig. 2. Temperature field distributions of crystals and different centerlines. (a) Bonding crystal; (b) single Nd∶YAG crystal; (c) x-axis; (d) y-axis; (e) z-axis

Fig. 3. Simulated and measured thermal focal length comparison of bonding crystal and single Nd∶YAG crystal

Fig. 4. Comparison of experimental diagrams. (a) Bonding crystal; (b) single Nd∶YAG crystal

Fig. 5. Photographs. (a) Bonding crystal; (b) single Nd∶YAG crystal

Fig. 6. Output power versus pump power

Fig. 7. Stable and unstable regions of bonding crystal and single Nd∶YAG crystal

Fig. 8. Far field spot and beam quality. (a) Single Nd∶YAG crystal; (b) bonding crystal