Design of Mode Division Multiplexing for High Data Rate Passive Optical Networks Using Radio Over Fiber Technology

Abstract

Passive Optical Networks (PON) are a recent technological development that has emerged in recent years. Nowadays, there is a growing and increasing need for high-speed data rates in wired and wireless networks. A cost-effective and efficient approach for deploying large bandwidth systems that can support high-speed connectivity is the implementation of the Radio over-Fiber (RoF) system, which serves as a credible architecture for both wired and wireless access. The bandwidth limitation of access networks, coupled with the growing demand for high-spectrum bandwidth and restriction access technologies, has led to the implementation of fiber to the home (FTTH) as a means of providing high-speed services. MDM is investigated during transmitting of high data rates for increasing capacity in transmission systems and optical access networks. The aim of the thesis is to overcome the limits of traditional PONs by using MDM-based PONs with RoF technology to obtain a high capacity data rate for comparing RF and electrical constellation of 8-DPSK and 16-QAM. In this work, performance analyses were performed by Optisystem software by considering different parameters like eye diagrams, Q-factor, BER and the efficiency of the noise removal. From the analysis result good maximum Q-factor is 30.182 at 2.5 Gbps and 5km, which shows that the system performance is high, and the Good BER value2.03832e-200, at 5km, 2.5 Gbps and the choice between 8-DPSK and 16- QAM depends on the specific requirements of the communication system.16-QAM is preferred due to it has high spectral efficiency. The performance analysis of Mode division multiplexing during the Bessel filter and without the Bessel filter is understood. At a data rate of 2.5 Gbps and 20 km, the Q factor for MDM with a Bessel filter is 13.3265, and without a Bessel filter is 5.718. This indicates that using a Bessel filter can improve signal quality and result in a higher Q factor.