Spectrum-concentrated 27-fold multicasting of optical PDM superchannel by 6-pump four-wave mixing

We propose a novel spectrum-concentrated PDM superchannel multicasting scheme based on four-wave mixing and demonstrate 50GHz-equally-spaced, 27-fold multicasting of 120-Gb/s superchannel using only 6 pumps. All replicas exhibit better performance than 7% FEC limit.