"Examining parametric analysis and mitigation approaches for minimizing four-wave mixing effects in radio-over-fiber systems: a critical review"

Over the recent years, the need for high capacity and high broadband wireless access were in demand and in order to satisfy it various technologies were introduced among which Radio over fiber (RoF) came into existence which has low attenuation, immunity to electromagnetic interference and superior signal integrity. It is a technology whereby the light signal is modulated by a radio signal and then transmitted. Therefore, it enables the transmission of signal over long distance and thus improves the capacity and mobility of the optical transmission system. In this review, we would concentrate on analysing the effect of fiber nonlinearity such as Four wave mixing (FWM) effect in long haul transmission system. Basically, FWM is an impairment due to the interaction of field intensity with the fiber refractive index which results in signal broadening, undesirable signal modulation and attenuation and thereby limiting the transmission capability of long haul system. A parametric analysis for reducing the power level of crosstalk generated by FWM by incorporating various optical components in the communication link is done and optimization based on channel spacing, input power, fiber length, bitrate, is performed.