Hybrid unicast/broadcast transmitter for next generation optical access networks

In this paper, a hybrid unicast/broadcast signal transmitter for next generation optical access networks is proposed and experimentally demonstrated. Light waves generated from multiple laser are multiplexing by a multiplexer and fed into a phase modulator (PM). The light waves are modulated by the broadcast signal and then to separate a carrier from sidebands, polarization beam splitter (PBS) is employed. Mach-Zehnder Modulator (MZM) modulates the central carrier with a unicast signal. Polarization beam splitter (PBS) combines the unicast and broadcast optical signals before transmitted through 25 km single mode fiber (SMF) to the receiver side. Based on the experimental results, the proposed scheme achieves a very good bit error rate (BER) curve.