Design and Analysis of High-Speed Bottleneck-Free One-Dimensional OCDMA Based Gigabit Symmetric PON

In this paper, a high-speed Gigabit symmetric Passive Optical Network is proposed,designed and analyzed using 1-dimensional Spectral Amplitude Coding Optical CDMA technique and Free Space Optical (FSO) channel in the last-mile network to address the major bottleneck issue. The system is using Multi-Diagonal code, which has zero cross-correlation therefore it eliminates the Multiple Access Interference. Avoiding the low bandwidth copper/DSL wires and high-cost optical fiber cables, the FSO channel is used in the access network. Realistic parameters & different weather conditions are also considered to assess the proposed system. In this system, five locations are simulated using Optisystem v16 at a 10 Gbps/user data rate. For downstream 1550 nm & for upstream 1310 nm wavelengths are used. The backbone SMF cable is 20 km and the last mile FSO channel is tested at the distance from 100–1200m in heavy rain, heavy haze, and clear air. Error-free transmission is achieved in this work. The results achieved are BER of 10 - 18 for clear air at 1200 m range, 10 - 14 for heavy haze at 1200 m, and 10 - 11 for heavy rain at 550 m.