Fig. 1. Yb∶YAG thin-disk regenerative amplification system

Fig. 2. Variation of spherical and aspherical wavefronts with pump power

Fig. 3. Resonator design results. (a) Mode size evolution in resonator; (b) dynamic stability of resonator cavity

Fig. 4. Output power and single-pass small-signal net gain versus pump power at different repetition rates. (a) 1 kHz; (b) 10 kHz

Fig. 5. Quality factors of regenerative output beams at different repetition rates. (a) 1 kHz; (b) 10 kHz

Fig. 6. Power stabilities of regenerative output with and without active compensation for cavity misalignment

Fig. 7. Output power versus pump average power during pulse pumping

Fig. 8. Pulse pumping experiment results. (a) When pump peak power is 400 W; (b) when output average power reaches 35 W