A Bi-directional Radio-over-Fiber System Based on Electronically Optical Phase Modulation and Fiber Bragg Gating

we simulantly demonstrate a system scheme of generating and transmitting baseband and RF signal based on double-sideband with optical carrier suppression scheme to generate optical millimeter-wave signal via electronical-optical phase modulation (EO-PM) and FBG.. The network architecture with centralized light source at central station and with data remodulation using downstream wavelength received at a base station is an attractive solution for low-cost implementation of the upstream transmitter as it requires no light source and wavelength management at the base station. The electronically optical phase modulator is inexpensive and mature too. The downlink communicated bandwidth can be doubled to realize Ultra Width Band Ultra High Frequency (UHF) communication via phase modulation and FBG at the base station. And the other signal which is from FBG can be as uplink via amplitude modulation availably. The simulation results show that the bi-directional 2.5Gbit/s data and UHF microwave with 24GHz is successfully transmitted over 50km distance of a single-mode fiber with a dispersion of 20ps/nm/km, an attenuation of 0.25dB/km and a light source power of 3dBm.