Fig. 1. Experimental setup of Er:YAG laser

Fig. 2. Temperature distribution of the front surface of the crystal

Fig. 3. Temperature distribution curves of bonded/non-bonded crystal

Fig. 4. Simulated temperature distribution profile

Fig. 5. Pump light absorption and temperature distribution curves

Fig. 6. Output power and beam quality

Fig. 7. Spectra at different output power

Fig. 8. Stark energy level distribution