Selective delivery of DSB and SSB OFDM-based video signals over WDM PON

We propose and demonstrate a bandwidth-efficient overlay scheme in which a DSB (500 Mb/s) or SSB (1 Gb/s) OFDM-based video signal is superimposed over a 1.25 Gb/s times N WDM PON. Selective delivery is achieved by simply controlling individual transmitter laser biases at the central office. For subscribed customers, the optimal bias condition was obtained by observing power penalty changes for the PON and OFDM signals with reference to BER of 10^-9 and 10^-3, respectively. For low bias levels, the OFDM signal could not be recovered. With proper band-pass filters of 1 GHz bandwidth, 4 Gbps OFDM signal can be transmitted.