DWDM field trial: optical performance monitoring in a transparent and configurable multiclient metropolitan network

In this paper we present the topology of an optically transparent DWDM network testbed (part of the KomNet field-trial). We show results of our investigation on performance monitoring in the optical layer of this complex network. The testbed consists of a remotely configurable DWDM metropolitan area ring network (capable of transport up to 80x10 Gb/s) with two OADMs and one HUB/OXC and a long-haul bi-directional DWDM link (16x10 Gb/s, 8 spans over 750 km).