Invited Paper: 40-Gbit/s ETDM channel technologies for optical transport network

摘要

We review recent progress and the future of 40-Gbit/s electrical time division multiplexed (ETDM) channel technologies for the optical transport network (OTN), where optical technologies, including high-speed ETDM channel transmission and wavelength division multiplexing (WDM), dramati- call enhance network flexibility while reducing transport node cost as well as transmission cost. The 40 Gbi/s channel has recently been specified to be one of the optical channels in OTN. A new digital frame for the optical channels [optical channel transport unit (OUT)] was introduced for the network node interface of OTN in International Telecommunication Union- Telecommunication (ITU-T) standard.