Fig. 1. Spectral distribution curve of laser with central wavelength of 1 064 nm

Fig. 2. Power distribution curve of beam section outside 1 000 km of linear light source

Fig. 3. Cross sectional power distribution of 1 000 km single-mode laser beam

Fig. 4. Cross sectional power distribution of laser beam 1 000 km away when the deflection angle is（22.5°，-16.25°）

Fig. 5. Cross sectional power distribution of laser beam 1 000 km away when the deflection angle is（22.5°，-22.5°）

Fig. 6. Cross sectional power distribution of laser beam 1 000 km away when the deflection angle is（27.5°，-16.25°）