Performance analysis of DP-MZM based RoF network for 5G/6G

In this paper, an improving technique is proposed and analysed to augment the performance of next generation radio over fiber (RoF) network. This is based on linearization microwave photonic link by employing two parallel dual electrode Mach-Zehnder modulator (DE-MZMs). Subsequently, the optical single sideband (OSSB) is generated by properly selecting the phase of input two tone RF signals & dc biases of DE-MZMs. The parallel arrangement of both DE-MZMs significantly reduces the third order intermodulation (IM3) and other harmonics in the proposed RoF network. The outcomes demonstrate an improvement of 56.54 dB in the signal to noise distortion ratio (SNDR) in distortion dominant situation for the proposed RoF network in comparison to the conventional network (90° phase shift based RoF network). These analytical results are also validated by simulation using OptSIM software and shows a close agreement. The proposed technique has the features of simple design of high linearized microwave photonic link and play a significant role to develop a backbone structure of future wireless networks.