Performance analysis of SCDCF-based and RDF-based 40-Gb/s OTDM and WDM systems

摘要

The performances of SCDCF-based and RDF-based 40Gb/s OTDM and WDM systems are compared by means of numerical simulation. Theory and numerical results were presented and discussed with 40Gb/s signal of different duty cycles. Cross―phase modulation effects in 40Gb/s WDM systems are showed for the first time. We find that in single channel transmission small duty cycle signal shows superior performance. The problem of RDF based system is mainly due to large nonlinearity of the RDF fiber we choose to calculate. The residual dispersion remains potential problem even at very excellent slope compensation in 40Gb/s systems. RDF based system offers more robust performance than SCDCF at the same value of compensation rate due to its relative short SMF fiber in every span.