Experimental demonstration of optical 5-Gb/s 16-QAM OFDM signal generation and wavelength reuse for 1.25-Gbit/s uplink signal

5 Gb/s 16 QAM OFDM signal for ROF downstream link and 1.25 Gb/s OOK signal via RSOA for upstream link are demonstrated. Negligible penalty is observed after 25 km SMF.