Design and performance analysis of bi-directional TWDM OFDM-PON with wavelength reuse scheme

The proposed work demonstrates an architecture for bi-directional Hybrid Passive Optical Network. It employs OFDM signals at 25 Gbps for downstream transmission. Utilization of wavelength reuse scheme with NRZ modulation to carry upstream traffic at 10 Gbps helps in reducing the cost of ONU. Power budget and BER analysis of the system is done for downstream transmission and the concept of upstream re-modulation has been discussed. The performance analysis is based on received power, eye diagram and constellation diagram.