Impact of FWM on Optical Scheme Performance under Different Limitations Factors and Modulation Formats

Abstract

Four-wave mixing (FWM) has been shown to be the leading nonlinear consequence in long transmission distance that can cruelly border the wavelength division multiplexing (WDM) and minor the scheme performance. In this work, the system analyze with performance under the effect of wavelength spacing in the case of normal RZ, NRZ intensity modulation - direct modulation (IM-DD) and in the existence of phase shift keying-modulation format, which comprised of (8-PSK and 16-PSK). In addition, the effect of wavelength spacing on FWM is evaluated through 4 kinds of optical fiber, SMF, DSF, NZDF and Large Effective Area Fiber (LEAF) for three channels. The outcomes show that the SMF presents minimum FWM power up to -40.88 dBm, while DSF offers maximum FWM power of -30.99 dBm. It is observed that for NZDF and LEAF, the FWM powers are -31.99dBm and -35 dBm, respectively. In the case of system quality with the channel spacing tuning after 150 Km, BER is 3.3×10−11 on received power of -12 dBm using 16-PSK modulation. Nevertheless, in the existence of NRZ arrangement the BER was originated to be worse and equal to 8×10−3 at same received power.