Fig. 1. Simulation of etalon parameters and longitudinal mode interval

Fig. 2. Experimental setup and optical path diagram

Fig. 3. Waveform and spectrum diagrams under different etalons at 5.2 W pump power

Fig. 4. Waveform and spectrum diagrams under different pump powers

Fig. 5. Waveform and spectrum diagrams after two-stage amplification

Fig. 6. Energy jitter and instability under different pump powers

Fig. 7. Output waveforms at different repetition rates