Fig. 1. Schematic diagram of phase-locked control coherent beam combining system based on multi-frequency dithering

Fig. 2. Intensity of noise in time and frequency domain

Fig. 3. Phase locking with different noise frequency

Fig. 4. Effect of noise frequency on RMS residual phase error

Fig. 5. The relationship between the control bandwidth and the number of channels

Fig. 6. Algorithm phase locking at different noise amplitudes

Fig. 7. Gain coefficient versus mean normalized photocurrent and RMS residual phase error under different channel numbers

Fig. 8. Relationship between the gain coefficient and the number of channels

Fig. 9. Mean normalized photocurrent and RMS residual phase error versus dithering amplitude under different channel numbers

Fig. 10. The relationship between the noise amplitudes and the control bandwidth at different sampling frequency

Fig. 11. Control bandwidth under different first modulated optical frequencies and frequency intervals