Enhanced architecture to suppress Rayleigh backscattering in colorless WDM-PON

In this paper, an architecture of colorless wavelength-division-multiplexed passive-optical-network (WDM-PON) has been proposed to suppress Rayleigh-backscattering which is capable ofsupporting 10 Gbps data symmetrically both in downlink and uplink routes over 60 km standard single-mode fiber (SSMF). Simulation results show that the proposed architecture with Manchester coded downlink and Differential-phase-shift-keying (DPSK) modulated uplink supporting a data rate of symmetrical 10 Gbps over a transmission distance of 60 km can be implemented as the potential candidate for next generation-PONS (NG-PONs). The proposed study is also extended and studied for orthogonal-frequency-division multiplexing (OFDM) modulated downlink and DPSK modulated uplink.