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

Abstract

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.