Fig. 1. Diagram of equivalent resonator in thin-disc multi-pass laser amplifier

Fig. 2. Stable region diagram and variation diagram of spot size at thin-disc in resonator. (a) Stable region diagram; (b) variation diagram of spot size

Fig. 3. Variations of spot radius and wavefront curvature with L₁ and L₂ at thin-disc. (a) Variation with L₁; (b) variation with L₂

Fig. 4. Schematic of seed light transmission system of thin-disc laser amplifier

Fig. 5. Beam characteristics at different positions in amplifier. (a) Plot of stable region at thin-disc in amplifier; (b) variation of spot size in amplifier

Fig. 6. Thin-disc multi-pass laser amplifier

Fig. 7. Surface profile of thin-disc crystal

Fig. 8. Distributions of output laser intensity of seed light after different times of amplification. (a) 0; (b) 2; (c) 6; (d) 10

Fig. 9. Variations in output pulse energy and single pass gain with amplification times. (a) Variation in output pulse energy; (b) variation in single pass gain