Fig. 1. Schematic diagram of compressive quadriwave lateral shearing interferometry

Fig. 2. Flow chart of data processing of compressive quadriwave lateral shearing interferometry

Fig. 3. Simulation setup diagrams of compressive quadriwave lateral shearing interferometry. (a) Phase distribution at 0° rotation; (b) phase distribution at 35° rotation; (c) phase distribution at 70° rotation; (d) spectrum curve graph

Fig. 4. Simulation analysis results for γ. (a) Mean RMSE and ΔPPV versus γ values; (b) central cross-sections of theoretical phase versus reconstructed phases at γ=2, 6, 10, and 16 for the same spectral component; (c) reconstructed phase distributions under different γ conditions

Fig. 5. Simulation analysis of spectral channel number effects. (a) Mean RMSE and ΔPV versus number of spectral channels N; (b) central cross-section comparison between theoretical phase and reconstructed phases at N=10, 20, 30, and 50; (c) reconstructed phase distributions for different channel counts

Fig. 6. Simulation results of frame number (i) analysis. (a) Variation curves of mean RMSE and mean ΔPPV for phase retrieval versus different frame numbers; (b) comparison of central cross-sections between theoretical phase and reconstructed phases at frame numbers i=1, 4, 8, and 12; (c) reconstructed phase distributions under different frame numbers

Fig. 7. Experimental setup for single-shot spatiotemporal measurement of ultrashort pulses via compressive quadriwave lateral shearing interferometry

Fig. 8. Plots of experimental results. (a)(d) Compressed images collected in the experiment and restored interference patterns; (b)(e) comparison diagrams of theoretical phase and restored phase; (c)(f) comparison images in the horizontal and vertical directions