Multipoint dissemination of RF frequency in delay-stabilized fiber optic link in a side-branch configuration

In this paper we are presenting the concept of the multipoint dissemination of RF frequency signal via a fiber optic network with actively stabilized propagation delays. The idea allows to add tapping nodes and side branches to the main point-to-point frequency transfer link, constituting a tree-like dissemination network. We are demonstrating the experimental results with the 100 km-long side branch starting at the 110^th km of the 170 km-long main link. At the end of the side branch we obtained the Allan deviation of a 10-MHz frequency signal of about 4×10^-17, and the time deviation not greater than 1.2 ps for 10⁵ s averaging.