Implementation and analysis of 32 channel CSRZ DWDM system at narrow channel spacing

In this work, we use CSRZ modulation at 32 x 40 Gbps DWDM long-haul communication system under the effect of non-linearities using the dispersion compensation technique. The proposed system performance is measured at 30 GHz, 40 GHz, and 50 GHz channel spacing in terms of BER, Q-factor, and eye-diagram for the varied launched laser power ranging from −5 dBm to 10 dBm of CW laser array and 6000km transmission distances. We use three EDFA amplifiers for signal amplification to boost signal power. By optimizing the system parameters, we use pre and post-Gaussian filters at the transmission distance of 6000 km is achieved for a BER value of 1.4306E-010 with a corresponding Q-factor value of 6.30611 at 5 dBm input power at 30GHz channel spacing and without the Gaussian filter, we achieve Q factor is 4.18952 and BER is 1.35038E-05 at -5 dBm power level at 50GHz channel spacing.