Fig. 1. Spatial homodyne coherent optical communication system based on BPSK modulation format

Fig. 2. Schematic of 90° space optical hybrid structure

Fig. 3. The influence curve of five primary aberrations on the hybrid efficiency of the space output 90° space optical hybrid under different target radius conditions

Fig. 4. The influence curve of five primary aberrations on the hybrid efficiency of the single-mode output type 90° space light hybrid

Fig. 5. Relation curve between hybrid efficiency and turbulence intensity

Fig. 6. 90° space optical hybrid

Fig. 7. The effect of primary aberration on mixing efficiency experimental optical path

Fig. 8. Two-dimensional and three-dimensional images of five primary aberrations simulated by the experiment

Fig. 9. Intermediate frequency signal output peak-to-peak ratio with aberration and without aberration

Fig. 10. The ratio of the output optical power when the signal light is input to the hybrid alone with and without aberration

Fig. 11. Random phase plate overall phase distribution

Fig. 12. Wavefront aberration introduced by different positions of random phase plate

Fig. 13. Dynamic turbulence simulation experiment

Fig. 14. Amplitude change of 90° space optical hybrid

Fig. 15. Peak-to-peak Intermediate frequency signal at 20 sampling points within 5 minutes