Simultaneous all-optical WDM multicast and unicast scheme for WDM optical access network based on SOA and AWG

A simultaneous all-optical WDM multicast and unicast scheme with large bandwidth for WDM optical access network by using a multicast module based on FWM in SOA has been proposed and verified. Two strategies of setting the multicast module have been discussed to apply this scheme to passive optical network and active optical network. One-to-four WDM multicasts of 10Gb/s NRZ-OOK signal are successfully obtained through FWM with two pumps in SOA, and all the four multicast signals achieve error-free performance with power penalty less than 4.3 dBm under BTB condition and over 20 km fiber transmission in both strategies. This scheme is suitable for processing the multicast services with sudden burst characteristic and real-time demand to support with high speed, fast service provisioning and high resource efficiency and may also play a role of physical backup in case of the big data migration or the network disaster.