The present invention discloses an
optical frequency comb time-frequency transfer device based on the
White Rabbit protocol, belonging to the field of
time synchronization detection, comprising: two symmetric dense
wavelength division multiplexers form a transmission link through an
optical fiber link; after locking the frequency according to the time-frequency reference, the
heterodyne signals S1 of the third and the first
optical frequency comb pulse sequences are respectively calculated, and the detection results S3 of the second and the third
optical frequency comb pulse sequences are sent to the first time-frequency transfer module; at the same time, the detection result S2 of the third and the second optical
frequency comb pulse sequences is calculated and sent to the second time-frequency transfer module; the first time-frequency transfer module is connected in series with the second time-frequency transfer module through the transmission link to establish a
White Rabbit connection; the detection results S1 and S3 are transmitted to the second time-frequency transfer module; according to the fixed
delay and the transmission link
delay, combining S1, S2 and S3, the
phase offset of the second and the first optical
frequency comb output pulse sequences is calculated, and the phases of the two optical frequency combs are adjusted to be consistent to complete
time synchronization; the
time synchronization accuracy of the present invention is improved to the
femtosecond level.