Abstract
For all optical Wavelength Division Multiplexing (WDM) network based on G.653 fibers, we investigate the quality factor deterioration due to combined nonlinear effects and Amplified spontaneous emission (ASE) noise for system parameters based on ITU-T Recommendation G.692. The investigation: (a) emphasizes on stimulated Raman scattering (SRS) and four wave mixing (FWM) effects which are the dominant nonlinearities known to limit WDM system performance and (b) accounts for beating between nonlinearities and beating between ASE noise and nonlinearities. Using the proposed model, performance of the worst affected channels due to SRS and FWM is compared and the results indicate that the worst affected channel due to SRS performs better and hence must be preferred for reliable and efficient transmission over the worst affected channel due to FWM. Further, the results suggest that to achieve a desired error rate (quality factor); there exists an optimal value of channel spacing for a given number of channels. The proposed theoretical model is also validated through extensive simulations over Rsoft OptSimTM simulator and the two sets of results are found to match, indicating that the proposed model accurately calculates the quality factor of the all optical WDM network.
Highlights
Optical communication based on Wavelength-Division multiplexing (WDM) is progressing at an astonishing rate due to the possibility of high transmission capacity
For all optical Wavelength Division Multiplexing (WDM) network based on G.653 fibers, we investigate the quality factor deterioration due to combined nonlinear effects and Amplified spontaneous emission (ASE) noise for system parameters based on ITU-T Recommendation G.692
Attempts made to utilize the large bandwidth provided by the optical fiber along the WDM links are hindered by the accumulation of fiber nonlinearities and amplified spontaneous emission (ASE) noise due to Erbium-Doped Fiber Amplifiers (EDFAs) [3], making the performance limitations imposed by these effects an important area of study
Summary
Optical communication based on Wavelength-Division multiplexing (WDM) is progressing at an astonishing rate due to the possibility of high transmission capacity. We present an extension of the work in [18] and develop a mathematical model to evaluate the performance of an optical star network considering the combined effect of FWM, SRS and ASE noise. The reason for this can attributed to the fact that when length of the fiber is increased, FWM generated components will increase and will interact considerably leading to FWM becoming the more dominant effect compared to SRS, as a result of which the worst affected channel due to FWM will give degraded performance compared to the worst affected channel due to SRS It has been shown experimentally in [4] that when three spaced channels with modest power level of 3 mW respectively are launched at the input of a short 25-km dispersion-shifted fiber (DSF), substantial impairment due to FWM occurs.
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