Fig. 1. Phase noise compensation scheme based on SPGD algorithm

Fig. 2. Structure of phase controller

Fig. 3. Silicon based optical phased array chip. (a) Chip is embedded on PCB; (b) micrograph of chip

Fig. 4. Optical field distribution of OPA composite beam. (a) Two-dimensional light field distribution before optimization; (b) two-dimensional light field distribution after optimization; (c) three-dimensional light field distribution after optimization; (d) theoretical and experimental results of one-dimensional light field of main lobe; (e) one-dimensional light field distribution curves of scanning beams at different angles

Fig. 5. Change curve of performance evaluation function with time when phase controller is switched on and off

Fig. 6. Voltage signal output from high speed single point photodetector

Fig. 7. Relationship between SPGD algorithm execution time and performance evaluation function value under different delay treatment

Fig. 8. Relationship between SPGD algorithm execution time and performance evaluation function value under different initial light intensity

Fig. 9. Main lobe intensity of beam at different temperatures

Fig. 10. Main and sidelobe inhibition ratios at different temperatures