Chinese Optics Letters, Vol. 18, Issue 2, 020603 (2020)
Stable RF transfer over a fiber-optic ring with DSBCS modulation and a DSB RF signal
Pingyang Shi1, Guiling Wu1,2,*, Liang Hu1, Qi Li1, and Jianping Chen1,2
- 1Shanghai Institute for Advanced Communication and Data Science, State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- 2Shanghai Key Laboratory of Navigation and Location-Based Services, Shanghai 200240, China
We propose a radio frequency (RF) transfer technique with passive phase noise compensation over a fiber-optic ring. By adopting different frequencies and same wavelength transmission and double sideband (DSB) with carrier suppression (DSBCS) modulation, the impact of backscattering can be effectively suppressed. A stable RF signal can be obtained via frequency mixing at an arbitrary access site along the fiber-optic ring. As the two directional transmissions adopt the same fiber and same wavelength from the same laser, the bidirectional propagation symmetry can be maximally guaranteed. We experimentally demonstrate 2 GHz RF signal transfer along a 100 km standard single-mode fiber-optic ring.