Author Affiliations
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, China2Shanghai Key Laboratory of Navigation and Location-Based Services, Shanghai 200240, Chinashow less
Fig. 1. Schematic diagram of the proposed fiber-optic frequency transfer scheme. MO, master oscillator; LO, local oscillator; IM, intensity modulator; RX, receiver; DSB generator, double-sideband generator; CP module, conjugated phase module; OC, optical coupler; OI, optical isolator; FD, frequency divider; FM, frequency mixer.
Fig. 2. Diagram of signals before and after the PD at the remote/access site (left) and the local/CS (right) in (a) the SFSW scheme, (b) DFSW scheme based on frequency multiplication, and (c) the proposed scheme. WS, wanted signal; BS, backscattering signal.
Fig. 3. Experimental setup of the proposed passive fiber-optic RF transfer. EC, electrical coupler; EDFA, erbium-doped fiber amplifier; Bi-EDFA, bidirectional erbium-doped fiber amplifier; PSB, polarization scrambler board; BPF, band-pass filter; PD, photodetector; DFM, dual frequency mixer.
Fig. 4. (a) Measured phase noise spectra at 10 MHz and (b) Allan deviations of different fiber-optic frequency transfer systems.