Fig. 1. Schematic diagram of coupled optoelectronic oscillator

Fig. 2. Diagram of I/Q mixer detecting signal phase difference before and after the modulator

Fig. 3. Schematic diagram of the cavity length control experiment of the regenerative mode-locked cavity of the coupled photoelectric oscillator

Fig. 4. The output RF signal power drift before and after cavity length control

Fig. 5. Spectrogram of output RF signal

Fig. 6. Dynamic cavity length control effect of the COEO system