Fig. 1. Optical phase-locked phase coded SAL system

Fig. 2. Linear small signal model under steady state of OPLL

Fig. 3. Transfer functions of OPLL. (a) Bode plot of open-loop transfer function; (b) bode plot of closed-loop transfer function

Fig. 4. OPLL noise transfer model

Fig. 5. Loop phase noise residual curve

Fig. 6. Tested phases with or without OPLL

Fig. 7. Imaging results under phase locked state. (a) Two-point targets in real scene; (b) two dimensional imaging result; (c) range imaging result; (d) azimuth imaging result

Fig. 8. Imaging results without phase locked state. (a) Two dimensional imaging result of two-point target; (b) azimuth imaging result of two-point target