Fig. 1. SBC system based on AO

Fig. 2. Schematic diagrams of MDG. (a) Schematic diagram of MDG structure; (b) schematic diagram of MDG with thermal deformation, where Δτ(x) is thermal deformation generated at different grating positions

Fig. 3. Calculating optical path difference with multi-software co-programming introduced by grating thermal deformation

Fig. 4. Finite element model of MDG

Fig. 5. Distributions of temperature and thermal deformation of MDG. (a) Temperature distribution of MDG; (b) thermal deformation distribution of MDG; (c) maximum temperature of MDG versus power density of incident laser; (d) thermal deformation of MDG versus power density of incident laser

Fig. 6. Structure of inner optical path and finite element model. (a) Structure diagram; (b) finite element model

Fig. 7. Incident light intensity, temperature and heat source distributions in inner optical path. (a) Normalized intensity distribution of incident light; (b) temperature distribution of fluid field in internal optical path; (c) heat source distribution of fluid field in internal optical path

Fig. 8. Distributions of optical path differences. (a) Distribution of optical path difference caused by gas; (b) distribution of optical path difference caused by reflector; (c) distribution of optical path difference of inner optical path

Fig. 9. Intensity distributions of far-field light before and after correction with AO under influence of single factor. (a) Directional deviation; (b) linewidth widening and divergence angle; (c) thermal effect of MDG; (d) thermal effect of inner optical path

Fig. 10. β factors before and after correction with AO under influence of single factor. (a) Non-common path phase perturbation; (b) thermal effect of MDG; (c) thermal effect of inner optical path

Fig. 11. Correction effects with AO considering whole-link imperfection factors

Fig. 12. Decomposition of wavefront aberrations of center sub-beams before and after correction considering whole-link imperfection factors. (a) σ₁=25 μm, σ₂=0.5 mrad, P₁=500 kW/cm²; (b) σ₁=25 μm, σ₂=0.5 mrad, P₁=1000 kW/cm²; (c) σ₁=25 μm, σ₂=2 mrad, P₁=1000 kW/cm²