Reduction of Four-Wave Mixing in DWDM System using Electro-Optic Phase Modulator

Abstract

<span>In this paper, electro-optic phase modulator (EOPM) is used to reduce the effect of four-wave mixing (FWM), which is placed after 64 DWDM-channels multiplexer. It was found that the FWM is very sensitive to the phase deviation of the EOPM, and it can be reduced by introducing a phase shift between pulses. The simulation results confirmed the ability of the EOPM in improving the system performanceas indicated by the bit error rates. In term of comparison, the system of 64 channels based intensity modulated/ direct detection (IM/DD) transmission achieved bit error rate of 10<sup>-26</sup> over 30 km and 70km without and with EOPM, respectively.</span>

Performance Comparison of Different Modulation Formats for a 40 Gbps Hybrid Optical CDMA/DWDM System against ISI and FWM

“…In addition, nonlinear effects such as inter-and intra-channel Four Wave Mixing (FWM) are considered a major source of impairments in high data rate and high-capacity optical networks [12,13]. In fact, inter-and intra-channel FWM effects have been widely investigated in pure WDM systems and are considered one of the foremost application issues in optical fiber networks [14][15][16][17][18]. On the other hand, the effects of inter-and intrachannel FWM in the hybrid optical CDMA/DWDM system have not been addressed.…”