Fig. 1. Light path schematic of experimental setup

Fig. 2. Schematic of amplifier experimental setup

Fig. 3. Overall photo of amplifier experimental setup

Fig. 4. Small signal gain coefficient and energy storage efficiency with different charging voltages

Fig. 5. Output performance of laser amplifier with the charging voltage of 22 kV

Fig. 6. Near field spot image. (a) Static image; (b) dynamic image

Fig. 7. Temporal wavefront of the output laser pulse

Fig. 8. (a) Static wavefront distortion and (b) far field spot of the system