Combating Stimulated Raman Scattering Nonlinear Effect on 8-channels DWDM Systems

Abstract

The performance of dense wavelength division multiplexing (DWDM) system in optical fiber network communication is influenced by various factors, one of them is called a nonlinear effect. Stimulated Raman Scattering (SRS) is one of the nonlinear effects that occur due to a high-power level utilization, causes a signal scattering phenomenon that grown exponentially as the power increases. This works aimed to analyze the bit error rate (BER) and Q-factor performance of DWDM systems that suffer from SRS nonlinear effects on optical power launch, channel spacing, and bit rate variations. Observations were made on a model of 8-channels DWDM, over 100 km optical fiber cable with channel spacing variations of 50, 100, and 200 GHz. The DWDM system was designed using the erbium-doped fiber amplifier (EDFA). The system performance was observed with optical power launch variations of -6, - 4, -2, 0, 2, 4, 6 dBm, and bit rates for 10 and 40 Gbps. Based on the result, the 6 dBm optical power launch, with 200 GHz channel spacing, and 10 Gbps data rates, provides the best performance of 1.78 x 10−151 BER values, and Q-factor of 48.57. The observation of nonlinear systems performance is measured with an optical spectrum. Changes in the value of optical power launch, channel spacing, and data rate had affected the performance of the DWDM nonlinear system.