Chinese Optics Letters, 2020, Vol. 18, Issue 2, pp.
Stable Radio Frequency Transfer over Fiber-optic Ring with DSBCS modulation and DSB RF signal
Shi Pingyang, Wu Guiling, Hu Liang, Li Qi, Chen Jianping
- Shanghai Jiaotong University
- Shanghai Jiao Tong University
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 (DFSW) transmission and double-sideband with carrier suppression (DSBCS) modulation, the impact of backscattering can be effectively suppressed. A stable RF frequency signal can be obtained 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.