Simulation Investigation of Symmetric 8 × 25 Gbps Hybrid TWDM-DFMA PON for Long-Reach Applications

Abstract

By utilizing digital filter multiple access (DFMA) technique in the optical access networks allows immense potential to offers superb backward compatibility with existing optical as well as forthcoming cloud access networks. Time and wavelength division multiplexing passive optical network (TWDM-PON) incorporating DFMA depicts the promise of absolute and economical optical access networks for 5G based long-reach high speed applications. This simulation work in OptiSystem software, presents a bidirectional hybrid TWDM-DFMA PON system at 25Gbps data rate employing eight uplink and eight downlink channels for long-reach applications. The advantage of this work is to provide a high-bandwidth as well as advanced last-mile network having adequate resource utilization for fiber links. The minimal received power of -19dBm in uplink as well as -14dBm in downlink transmission can be obtained by the proposed system over 50km fiber length at 200Gbps data rate. The system offers faithful data transmission over 150km and 100km in uplink and downlink directions, respectively, over a single fiber link. Further, the system can support end optical units up to 250 in uplink and 120 in downlink successfully. Moreover, a power budget improvement of 4dB and a maximum optical signal to noise ratio (OSNR) of 91dB can be obtained for the system. Besides this, the proposed PON is most efficient compared to other conventional PONs in terms of less energy consumption, better spectral usage, long-reach transmission at high data rate and ability to handle large number of end users.INDEX TERMS Digital filter multiple access (DFMA), passive optical network (PON), time and wavelength division multiplexing (TWDM).