Abstract
In this paper, we propose and enhance the performance of a wavelength-division multiplexed hybrid fibre/free-space optics passive optical network (PON) system. The proposed system makes use of digital-pulse-position modulation scheme. The system performance is investigated under the turbulence effects and inter-channel crosstalk using numerical simulations. The proposed system can be deployed in regions where the installation of optical fibre cables is not feasible and also for application in indoor limited-mobility transmission. The results demonstrate that the performance of hybrid fibre/PON link is degraded due to the atmospheric scintillation and amplified spontaneous emission (ASE) noise. Further, we have investigated the performance degradation induced in the proposed system due to ASE noise resulted from optical amplification. A link range varying from 0.5 to 5 km is achieved using the proposed system under varying weather conditions.