A novel multi-granularity flexible-grid switching optical-node architecture

A novel multi-granularity flexible-grid switching optical-node architecture is proposed in this paper. In our system, the photonic lanterns are used as mode division multiplexing/demultiplexing (MD-Mux/MD-Demux) for selecting mode. The wavelength division multiplexer/demultiplexer (WD-Mux/WD-Demux) and the fiber bragg gratings (FBGs) are used to select wavelength channels with the various grid. The experimental results show that the transmission bandwidth covers the C+L band, the average transmission loss is −13.4 dB, and the average crosstalk is −30.5 dB. The optical-node architecture is suit for mode division multiplexing (MDM) optical communication system.