WAVELENGTH DISPERSION COMPENSATION IN RADIO OVER FIBER USING FIBER BRAGG GRATING

Abstract

The light signal in the Radio-over-fiber (RoF) method is modulated by a radio signal to permit long distance communication. In order to boost the capacity of RoF systems, WDM (wavelength division multiplexing) technology can be utilized in the optical fiber feeder network. RoF has nonlinear consequences like dispersion despite its benefits, which can be reduced by choosing the right dispersion control strategies. The use of dispersion management technique which provide greater efficiency for long haul optical networks. In this work we use the Optisystem version 20.0 software has to analyse an improved 32 channel WDM-based RoF optical system that incorporates DCF and FBG as dispersion compensators and can transmit data at 6 Gbps per channel while providing the best signal reception over distances of 120 km. Maximum Q factors of 18.38 were attained in 32 channel mode for constricted 50 GHz channel spacing with a corresponding input power of -5dBm. We also Analysed the impact of varying the grating structures of FBG such as chirped and uniform and discovered that the chirped FBG shows better results in terms of Q-factor.