Abstract
Self-phase modulation (SPM) effect on perfor- mance of 40 Gbit= s( 3� 13.33 Gbit=s) optical duty-cycle division multiplexing (O-DCDM) over 400 km (5 � 80 km) standard single mode fiber (SSMF) based on three dif- ferent dispersion compensation schemes is investigated by simulation. The result shows that the SPM effect is very strong in dispersion pre-compensation compared to post- compensation. Further reduction in SPM effect is observed by combination of pre- and post-compensation with the op- timum pre-compensation value of around 215 ps=nm. The simulation is performed at different launched power into dispersion compensation fiber (DCF). The range between � 6 to � 8 dBm is observed as the optimum power for all dis- persion compensation schemes. The highest SPM threshold is observed when dispersion pre- and post-compensation are used together, which is around C6:7 dBm. In addition, the optimum range of launched power into SSMF for differ- ent transmission distances from 80 km to 1280 km is also presented.
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