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In this paper, performance analysis of 64-channel DWDM is investigated using EDFA and an optimized reflectivity of the cascaded fiber Bragg grating (CFBG) to minimize the presence of more side lobes. The progress of 5G technologies in the telecommunication industry leads to more end-users and higher data traffic, which increases data rate consumption. This introduces more fiber nonlinearities, consumption of high input power, and introducing more sidelobes, thereby degrading DWDM system performance. This research benefit shows that the EDFA and FBG with optimized reflectivity achieve high gain and reduce side lobes. The performance of the proposed experiment can be assessed by computing the quality factor (Q-factor), Bit Error Rate (BER), and output signal-to-noise ratio (OSNR) of a DWDM system embedded with EDFA and CFBG system. The proposed DWDM system is analyzed from …