Cost Efficient 4 × 2.5 Gb/s Transparent WDM Ring Network using DML and MetroCor Fiber for Long Reach Applications

Abstract

Abstract In this paper, we analyze the performance of the 4 × 2.5 Gb/s wavelength division multiplexing (WDM) transparent metro ring network comprising of one network node and eight access nodes. Here, the power requirement of 360 km ring network has been evaluated using the optical signal to noise ratio (OSNR), Q-factor, inter-symbol interference (ISI) and power penalty. The metro network utilized the cost-effective directly modulated laser (DML) and a negative dispersion fiber called MetroCor in order to give enhanced performance in terms of Q-factor. The power requirement of the network is optimized for the signals over SMF-28 and MetroCor fibers. Also, the comparison is drawn between uncompensated and compensated (with -post and -symmetrical) SMF-28 fibers in the metro environment. The excellent value of Q-factor is obtained at all the nodes. Also, the results show higher OSNR values in the metro environment. Although, smaller power penalties are detected for nodes closer to the network node, but distant nodes require higher power for better transmission.