Performance Enhancement of Radio over Multimode Fiber System using Fiber Bragg Grating for Micro and Pico Cell Applications

Radio over Fiber (RoF) is a promising technology for short range transmission applications within multimode optical fiber. Typically, the RoF link employs a single mode fiber. But the signal power at the remote antenna become small due to the power loss in the electrical to optical and optical to electrical conversion process. Coupling efficiency of an electrical to optical converter can be improved with multimode fiber. But multimode fiber suffers from dispersion. Therefore, the paper proposes a simplified and efficient Radio over Multimode Fiber (RoMMF) system that can reduce the effect of dispersion by employing Fiber Bragg Grating (FBG). The performance analysis based on maximum Q-factor, minimum BER, threshold, eye height and jitter are extensively investigated. In addition, the effect of fiber length on these performance metrics is presented. Finally, a FBG based RoMMF system is proposed by providing a side-by-side comparison between the proposed and traditional system for micro and pico cell applications.