Fig. 2From: Stable frequency transfer for clock synchronization for telecom networksThe schematic diagram of the terahertz wave distribution on branching optical-fiber networks. OFCG, optical frequency comb generator; PMC, polarization maintained coupler; OF, optical filter; AOFS, acousto-optic frequency shifter; PLL, phase-locked loop; DHPT, dual-heterodyne phase error transfer; SSMF, standard single-mode fiberBack to article page