Realization of 4 × 10 Gbps FSO-WDM System Incorporating Flattening Filter

The free space optics (FSO) and wavelength division multiplexing (WDM) based system supports and contributes to the various services provided by big data, AI, online gaming, and 5G+ mobile networks. Additionally, the WDM access system may provide extended and long-reach coverage, high channel capacity, and high flexibility. Thus, a 40Gbps FSO-WDM system incorporating gain flattening filter is realized as well as investigated. It is shown that 500-1600m range at bit error rate of 10
^-3
is obtained at 10Gbps throughput. The −40dBm received power is achieved w.r.t. −20dBm launch power for distinct wavelengths after 100m range. Also, the system gain of −32 to 0dBm & noise figure of 32dB are obtained successfully and indicates superiority over other existing designs.