Evaluation of a DWDM-upgraded PON for FTTBusiness

A dense WDM-upgraded PON has been studied to investigate the future-safe evolution of existing PONs. This upgrade provides extra connections similar to leased lines. The emphasis is laid on the business segment, where the provisioning of high-bandwidth services with transparency to transport format is required. The economics of WDM techniques in access are discussed. A gigabit Ethernet link over a dense WDM-upgraded PON has been demonstrated. The performances are evaluated and characterised. Finally a cost-effective solution for a WDM-upgrade architecture is proposed.