Design and Performance Analysis of a 16-Channel DWDM RoF System Using 112 Gbps Coherent DP-QPSK Modulation

Development of DWDM-based RoF Technology was prompted by the growing needs for high data rates and huge channel capacities. With the use of appropriate dispersion compensation methods & digital modulation techniques, system performance efficiency can be further improved and upgraded. We had suggested 112 Gbps data rate per channel RoF communication system with 16 channel capacity with DWDM technology. In the given system direct modulation technique with DP-QPSK digital modulator is used and for dispersion effect fiber Bragg grating compensator is employed. This analysis of system is being carried out inOptisystem16.0 for the transmission range of upto 350 Km for spacing of channel ranging from 25 GHz to 100 GHz. The execution of proposed system is observed in terms of different performance metrics constellation diagram, SNR& Power spectrum obtained for different channel. We had obtained optimum power output in the range of (24–25 dBm) for the give system design with different channel spacing, laser input power and for varying transmission range. Also with the use of FBG nonlinearity and dispersion effects gets reduced.