Fig. 1. Layout of the experimental setup. HWP, half wave plate; TFP1 and TFP2, thin film polarizers; L1–L4, lenses; GL1 and GL2, Glan prisms; QWP1 and QWP2, quarter wave plates; CM1 and CM2, concave mirrors; FS, fused silica plate.

Fig. 2. (a) Total efficiency of the NER in the MPC as a function of elliptical angle. (b) Optimum total efficiency when the fused silica plate is placed at different positions.

Fig. 3. (a) Broadened spectra when the plate is placed at different positions. (b) Spectral bandwidth at the intensity of –20 dB (red line) and the corresponding FTL (blue line).

Fig. 4. SHG-FROG characterization of the filtered pulse. (a) Measured and (b) retrieved SHG-FROG traces (0.45% FROG error on a 512 × 512 grid). (c) Measured spectrum (red line) and spectral phase (blue line). (d) Input pulse duration (blue dashed line), retrieved pulse duration (red line) and calculated FTL pulse duration (black line).

Fig. 5. Beam quality after the MPC device.

Fig. 6. Schematic of the Yb:KGW chirped pulse amplifier.

Fig. 7. (a) Spectrum and (b) pulse duration of the Yb:KGW amplifier.

Fig. 8. Temporal contrast of the homemade Yb:KGW amplifier with different seed injections.