Hybrid WDM/Optical CDMA System Based on Hybrid Spectral/Spatial Coding Scheme

The optical CDMA and WDM systems have been of widespread implementation for local and metro access network. This is because optical CDMA systems provide users both simultaneous and asynchronous access to networks with high security [1], and WDM systems provide a relatively high transmission capacity [2]. In addition, optical CDMA can be overlaid onto existing WDM networks in order to enhance the network security [3-6]. These hybrid systems prompt high service differentiation in future access networks, where various bit rates and quality of service are simultaneously joined. Recently, hybrid WDM/optical CDMA systems have been proposed for network security and demonstrations of WDM/ optical CDMA transmission have been performed [6, 7]. Our previous approach has been simulated for optical CDMA security enhancement, which is based on hybrid SAC/optical CDMA-WDM overlay scheme [4]. In addition,