Fig. 1. Light intensity distribution of square flat-topped beams

Fig. 2. Schematic of ICF target cavity device

Fig. 3. Influence of different incident angles on light intensity distribution at focal point. (a) θ=0°; (b) θ=35°; (c) θ=65°

Fig. 4. Two-dimensional light intensity distribution curves in different directions. (a) X axis; (b) Y axis

Fig. 5. Characteristic curves of beam waist width in different directions with incident angle. (a) X axis; (b) Y axis

Fig. 6. Light intensity distribution at cross section of target cavity with different transmission distance (θ=35°). (a) Z_l=0.04 mm; (b) Z_l=0.10 mm; (c) Z_l=0.30 mm; (d) Z_l=1.00 mm; (e) Z_l=3.50 mm; (f) Z_l=3.70 mm