Abstract
Radio-over-fiber (RoF) system will be recognized as backbone for next-generation networks by offering capacity, simplicity in design, cost-effectiveness, green communication, etc. But the crucial performance degrading bound for RoF system is third-order intermodulation (IM3) error when high signal input power is employed. In this regard, this paper presents an analytical analysis with verified simulation of three radio frequency signals incorporating dispersion and single sideband modulation technique. This paper illustrates the results to reduce nonlinear distortion errors by selecting the medium values of the modulation index and proper fixed frequency differences between input signals for transmission distances of 25 km and beyond. The performance of multi-tone RoF system is further improved by employing linearization technique. The two linear polarizers are placed before and after Mach–Zehnder modulator. The IM3 can be significantly suppressed by properly selecting the angles between two linear polarizers.
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Singla, S., Kumar, P. SNDR optimization of linearized Mach–Zehnder modulator for multi-tone RoF system. J Opt 48, 224–231 (2019). https://doi.org/10.1007/s12596-019-00524-2
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DOI: https://doi.org/10.1007/s12596-019-00524-2