Two way DWDM optical network for analog and digital transmission

Summary form only given. We have demonstrated a robust two way WDM network within a conventional HFC plant. The broadcast analog signal maintains CNR >50 dB with narrowcast signal CNR >40 dB. The return path achieves S/(N+I)>40 dB with 15 dB dynamic range. Both exceeds the bit-error-free requirement for digital signals.