Bidirectional hybrid OFDM based Wireless-over-fiber transport system using reflective semiconductor amplifier and polarization multiplexing technique

摘要

In this paper, a bidirectional hybrid OFDM based Wireless-over-fiber architecture has been investigated and demonstrated to transmit 10?Gbps as well as 6.25?Gbps OFDM data for downlink transmission and 5?Gbps as well as 2.5?Gbps OFDM data for uplink transmission over 50-km single mode fiber (SMF) employing polarization multiplexing technique (POLMUX) at optical line terminal (OLT) and optical network unit (ONU). The POLMUX technique is exercised by polarization beam splitters and polarization beam combiners. Mach-Zehnder modulator and RSOA have been used for modulation at OLT and ONU respectively. Transmission performances are observed by constellation diagrams, EVM and BER values. For 10?Gbps, 6.25?Gbps down-link signal and 5?Gbps, 2.5?Gbps up-link signal the power penalty of 3?dBm, 2.3?dBm and 4?dBm, 3.2?dBm at a BER of 10?9between back-to-back and over 50-km SMF plus 10-m and 5-m wireless link, are observed respectively. For 32-QAM?