Optically concatenated 4-fold 40-Gbit/s multicasting, 4-Fold 40-to-160-Gbit/s multiplexing, and 160-to-40-Gbit/s demultiplexing using highly nonlinear fibers

We experimentally demonstrate concatenated 4-fold 40-Gbit/s signal multicasting, 4-fold 40-to-160-Gbit/s multiplexing and subsequent 160-to-40-Gbit/s demultiplexing based on supercontinuum generation and cross-phase modulation in highly nonlinear fibers. 5–9 dB penalty at 10
⁻⁹
BER was observed after the nonlinear processes.