The key feature of optical soliton transmission is the capability of pulses to maintain their shape even when transmitted over very long distance. However, the optical soliton technique in DWDM systems is difficult to use because of optical fiber nonlinearities. CPM leads to spectral broadening and FWM may result in significant crosstalk among the channels. Understanding the effects optical fiber nonlinearities is crucial in order to optimize system performance. In this study, the effects of optical fiber nonlinearities are evaluated in conjunction with various EDFA gain ratios in 16 channel and 32 channel optical soliton transmission systems.
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