Fiber-based multiple-access frequency synchronization via 1f–2f dissemination
Zhu Xi1, 3, Wang Bo1, 2, †, 
, Gao Chao1, 2, Wang Li-Jun1, 2, 3
, Gao Chao1, 2, Wang Li-Jun1, 2, 3 Schematic diagram of the frequency synchronization link with three DX access points.
