Computational analysis of an optimized 32 channel 320 Gbps DWDM hybrid free space/fiber optic communication system employing chirped fiber bragg grating

In the current networked world, technical advancements in Internet of Things (IoT) along with 5G communication technology have made free space optical communication (FSO) quite popular as it enhances bit rate in 5G communication and strongly supports large scale connecting links in IoT networks. Specific to real-life implementation schemes, it can be observed that an optical fiber cable link towards receiver end is a mandatory requirement in realization of FSO scheme. This results in a combined network architecture known as a hybrid free space optic/fibre optic (FSO/FO) communication network. The possible network scenarios as well as advantages of cascading dispersion compensating fiber (DCF) and chirped fiber bragg grating (CFBG) in the fiber link related to receiver end in dense wavelength division multiplexing (DWDM) hybrid FSO/FO networks has been investigated in this work. By optimizing parameter values of double FSO channels and CFBG in our hybrid FSO/FO system used in Optisystem software, for clear weather, the maximum link ranges have been recorded as 54 Km and 14 Km excluding and considering Misalignment Losses (ML) respectively. For Hazy weather, the corresponding values were recorded as 9.6 Km without ML and 6.7 Km considering ML attenuation. Highest Quality factors (Q factor) for the first channel, inclusive of ML attenuation, were found to be 6.42 and 6.9 for clear and hazy atmospheric conditions, respectively. The designed hybrid FSO/FO network proved to perform better compared to existing architectures, specifically with respect to link range.