Fig. 1. Light path schematic of the laser amplifier system: M1–M15, high reflection (HR) at 1064 nm.

Fig. 2. (a) Small signal gain coefficient with different pump energy on single pass; (b) energy storage with different pump energy on single pass.

Fig. 3. Output pulse energy as a function of seed energy.

Fig. 4. Temporal trace of output laser pulse.

Fig. 5. Near-field beam profile.

Fig. 6. Beam radius variation of the output laser.