Fig. 1. Structural diagram of SGII-5 PW laser system

Fig. 2. (a) Near-field light spot and (b) near-field profile of OPCPA output signal light from SGII-5 PW front end; (c) near-field light spot and (d) near-field profile of the second harmonic generation light from the 7th output beam of SGII system

Fig. 3. Normalized waveforms of injection for OPCPA-II. (a) Signal light; (b) pump light

Fig. 4. Variations in (a) parametric bandwidth and (b) phase matching angle with non-collinear angle of 20 mm LBO crystal in XOY principal plane

Fig. 5. (a) Variation in energy of output signal light with length of crystal under different energy of pump light; (b) variation in energy stability of amplification signal light with length of crystal

Fig. 6. Variations in (a) FF and FBC and (b) conversion efficiency with length of crystal

Fig. 7. (a)(b) Simulated near-field profiles and (c)(d) measured near-field profiles of OPCPA-II amplified signal light

Fig. 8. Variations in FF and FBC with length of crystal for OPCPA-II amplified signal light. (a) Interaction of ideal spatial-temporal super-Gaussian pump light and actual signal light; (b) interaction of ideal spatial-temporal super-Gaussian signal light and actual pump light