Fig. 1. (a) Defocus wavefront and (b) 0° astigmatism wavefront

Fig. 2. (a) X-defocus wavefront and (b) Y-defocus wavefront

Fig. 3. Schematic diagram of shaping optical path structure in X direction

Fig. 4. Schematic diagram of low-order aberration correction experiment system

Fig. 5. Physical picture of a high-precision electric displacement platform

Fig. 6. The XY defocus variation curves with the relatively different deviation of the co-focal distance of the convex cylindrical mirror and the concave cylindrical mirror in the (a) X-direction and (b) Y-direction shaping optical path

Fig. 7. PV curve of XY defocus aberrations with uncorrected aberration

Fig. 8. Far-field spot at 4.2 s with uncorrected aberration

Fig. 9. Laser output power over time with uncorrected aberration

Fig. 10. PV curve of XY defocus aberrations with closed-loop aberration correction

Fig. 11. Far-field spot at 4.2 s with closed-loop aberration correction

Fig. 12. Laser output power over time with corrected closed-loop aberration