Laboratory experiment of 9.2 GHz frequency transfer through a fiber

We report the preliminary laboratory experiment on transferring of a 9.2 GHz frequency through a 10 km commercial 1550 nm fiber in NIM. Using beat signal of the two side bands of 4.6 GHz phase modulation as transferring frequency, the sensitivity of actively compensating is significantly enhanced. We have obtained a stability of about 3E-15/1000s up to now only with slow loop servo.