The effects of EDFA noise on the performance of multi-wavelength OCDM-based Long-reach Passive Optical Networks

In this paper, we propose a model of Long-reach Passive Optical Network (LR-PON) using multi-wavelength optical code-division multiplexing (OCDM) and Erbium-doped fiber amplifier (EDFA). In addition, we analyze the effects of EDFA noise on the performance of OCDM-based LR-PON. Other noise and interference such as shot noise, thermal noise, beat noise, and multiple-access interference (MAI) are included in our theoretical analysis and simulation. We found that the location of EDFA on the link between OLT and ONUs plays an important role in network design since it affects network performance. According to the simulation results, to achieve low bit error rate, the EDFA should be located around 15 to 25 km from OLT when total link distance of 90 km.