Stable radio frequency dissemination in a multi-access link based on passive phase fluctuation cancellation

We propose and experimentally demonstrate a novel scheme of stable radio frequency (RF) dissemination in a multi-access radio-over-fiber (ROF) link. Unlike the active compensation scheme based on a phase-locking loop, the proposed scheme provides fast responses and infinite dynamic ranges with a passive phase fluctuation cancellation (PPFC) approach. In our experiment, a 2.5-GHz signal is steadily distributed to a remote end through an arbitrary user site in a 25-km optical fiber link. The stability of the recovered signals at the user site and the remote end are evaluated. By using the phase correction scheme, the peak-peak phase excursion is reduced from 140 to 4 ps at the user site and 160 to 4 ps at the remote end, respectively. The achieved relative residual frequency instabilities are 1.4117×10−16∕104s and 1.6503×10−16∕104s at the user site and the remote end, respectively.