Fig. 1. Schematic diagram of the nonlinear compression experimental setup. TP, fused silica plate; RM, reflective mirror; CM, chirped mirror; WP, wedge plate; WG, window glass.

Fig. 2. Spectrum of the output laser pulse with different energies.

Fig. 3. Autocorrelation signal of the laser pulse before and after compression.

Fig. 4. Pulse widths of the compressed pulse with different laser energies and different group velocity dispersion compensation amounts.

Fig. 5. Near-field of the output pulse with (a) low (5 mJ) and (b) high (64 mJ) energies.

Fig. 6. (a) The spectrum distribution of the output pulse with 48 mJ laser energy. Blue solid line, simulation result; blue dotted line, experimental result; red solid line, spectrum phase of the simulation result. (b) The intensity profile of the input and output pulses with 48 mJ laser energy. Blue solid line, input intensity shape; red dashed line, output intensity shape; purple solid line, output intensity shape after compression.

Fig. 7. (a) The spectrum distribution of the output pulse with 80 mJ laser energy. Blue solid line, simulation result; blue dotted line, experimental result; red solid line, spectrum phase of simulation result. (b) The intensity profile of the input and output pulses with 80 mJ laser energy. Blue solid line, input intensity shape; red dashed line, output intensity shape; purple solid line, output intensity shape after compression.

Fig. 8. Simulation result of the near-field distribution of the output pulse. The laser energy is 64 mJ and the total optical path is 2 m.

Fig. 9. The far-field focal spot of (a) the input pulse, (b) the output pulse and (c) the output pulse with phase correction, using an ideal lens with a focal length of 1 m.