Fig. 1. Phase self-sensing scheme based on ring fiber-optic link

Fig. 2. Principle of optoelectronic cooperative compensation

Fig. 3. Replicable receiver module

Fig. 4. Distributed phase-stabilized frequency transmission system ​

Fig. 5. Timing jitters at remote stations within 1 h under optoelectronic cooperative compensation​

Fig. 6. Timing jitter at remote station 1 within 1 h under disabled compensation​

Fig. 7. Frequency stabilities of the system under cooperative compensation and disabled compensation

Fig. 8. Timing jitter variation of remote station 1 during ODL reset with EPS compensation

Fig. 9. Timing jitter between remote station 1 and central station within 1 h. (a) ODL compensation; (b) EPS compensation; (c) optoelectronic cooperative compensation