Performance of A TWDM-PON Design Compensated with Dispersion Compensation Fiber for High Data Rates

Digital transformation requires significant high data rate transmission for broadband access, including optical fiber networks. Increasing the data rate is a technique to provide more capacity linearly; however, its major challenge is dispersion, which limits its capacity in shorter distances. This research proposed an optical network design with a bitrate observation of 64 Gbps for downstream and 50 Gbps for upstream in a four-channel passive optical network applying the dispersion compensation fiber (DCF) to compensate for the dispersion of a 1:64 splitting ratio and optimizing variables of channel spacing and WDM multiplexer bandwidth. The results show that the compensating component improves the Q factor, indicating that dispersion can be suppressed, while optimization of the WDM multiplexer bandwidth can potentially enable high data rate transmission over 40 km for both downstream and upstream. However, the downstream performance is still lower than the considered threshold of six up to 40 km, and further investigation is necessary to achieve the expected upstream performance.