Power budget analysis of full duplex single feeder-fiber wavelength division multiplexed passive optical access networks

Wavelength-division multiplexing passive optical access network (WDM-PON) has been considered as a promising next generation access network solution. We demonstrate and analyze the transmission performances and power budget issues of full duplex single feeder-fiber WDM-PON scheme. A 10-Gb/s differential quadrature phase shift keying(DQPSK) downstream and remodulated ON/OFF keying(OOK) upstream data signals are transmitted over 25 km standard single mode fiber. Simulation results show error free transmission having adequate power margins in both downstream and upstream transmission, which prove the applicability of the proposed scheme in future passive optical access networks. The power budget confines both the PON splitting ratio and the distance between the Optical Line Terminal (OLT) and Optical network Unit (ONU).