Effect of four-wave mixing in WDM optical fibre systems

Theoretical investigations of the combined effect of fibre nonlinearities, amplifier and receiver noise in a DWDM transmission system

“…Authors have earlier studied the effect of Four Wave Mixing in the total system noise considering the combined effect of SRS and FWM in the presence of amplified spontaneous noise (ASE). It has been found from the study that to maximize the signal to noise ratio of the transmitted signal in a WDM system FWM noise needs to be reduced as this is the dominant noise factor [4].…”

“…The two conventional limiting factors in designing optical communication systems, namely, fiber loss and dispersion, are relatively well understood, and can be easily overcome by optical amplifiers and dispersion compensation but fiber nonlinearities have not been fully analyzed and understood despite a rich collection of literature dealing with fiber nonlinearities [2][3][4][5][6][7][8][9][10]. Therefore, it is crucial to understand fiber nonlinearities and their effects on fiber-optic communication systems.…”

“…Keeping in view the findings of the literature [2][3][4][5], Stimulated Raman Scattering (SRS) and Four Wave Mixing (FWM) have been considered as main nonlinearities in our study on non zero dispersion shifted fiber (NZDSF) at low data rates such as 2.5 Gbps. The novelty of our work is that SRS has been calculated considering pulse walk off effect and hence the calculation is exact and without any assumption.…”

The steady SRS analysis theory of DWDM transmission system in single-mode silica fiber

“…The DWDM scheme has been a research focus because of its many advantages in terms of cost and performance [3][4][5][6]. The nonlinear effects and dispersion in transmission system are increasingly obvious with the increase of the transmission rate and the decrease of the channel spacing [7]. Stimulated Raman scattering is one such nonlinear effect which causes power transfer from a short wavelength to a long wavelength, and this limits the system performance [3].…”

Effect of fibre nonlinearities in a WDM transmission system

“…Authors have earlier studied the effect of FWM in the total system noise considering the combined effect of SRS and FWM in the presence of amplified spontaneous noise (ASE). It has been found from the study that to maximise the signal to noise ratio (SNR) of the transmitted signal in a WDM system FWM noise needs to be reduced as this is the dominant noise factor [11].…”