Fig. 1. Schematic diagram and real picture of the emissive hexagon array plane of a 19-element PFLA

Fig. 2. Simulation results of combined beam’s metrics characteristics of 19 Gaussian beamlets in the far-field with different T_r

Fig. 3. Experimental results of combined beam’s metrics characteristics of 19 Gaussian beamlets in the far-field with different T_r

Fig. 4. Bidirectional CBC scheme based on 19-element PFLA

Fig. 5. Curves of normalized optical intensity coupled by the AFOC array

Fig. 6. Long exposure patterns in far field (frame averaged) at different stages in the closed loop control processes

Fig. 7. Experimental setup and block diagram for CBC and pointing of a 19-element PFLA under 2 km turbulence conditions

Fig. 8. Variation of the reflected optical intensity metircs of the combined beam under different turbulence intensities at the stages of OP, PL, PLTT of SPGD algorithm

Fig. 9. Experimental principle and real device diagram of CBC and pointing of 57-element PFLA in 2.1 km transmission

Fig. 10. Metric curve of back-reflected signals from the target of different stages in the closed-loop control process

Fig. 11. Long exposure patterns on the target of different stages in the closed-loop control process

Fig. 12. CBC Receiving system diagram of a 19-element PFLA array within 2.1 km horizontal turbulence

Fig. 13. Metrics characteristics of 19-element CBC receiving in 2.1 km horizontal turbulence

Fig. 14. Scheme of the wavefront sensor based on AFOC array

Fig. 15. Wavefront recovery results

Fig. 16. Experimental setup of PFLA based on active wavefront measurement and external aberration pre-compensation

Fig. 17. Far-field spot distribution at different stages of the pre-compensation process

Fig. 18. Schematic diagram of the optical arrangement of the continuous beam scanning system

Fig. 19. Principle of continuous scanning based on AFOC and MLAS

Fig. 20. Experimental structure of beam scanning with two-stage modulation of AFOC and MLAS

Fig. 21. Long-exposure pictures of the linear scanning of MLAS alone and AFOC+MLAS