Limitations imposed by Four-Wave Mixing (FWM), Amplified Spontaneous\nEmission (ASE), dispersion and Stimulated Raman Scattering (SRS) on a\nmulti-spam DWDM system are theoretically studied. In this work, expression\nfor the linear dispersion parameter D has been defined as a function of number\nof channels in order to separate FWM and SRS effects and calculates both\nmaximum fibre length and optimum power. Additionally, our simulation results\nconsider the effect of ASE noise from Erbium Doped Fibre Amplifiers\n(EDFAs). This theoretical analysis yields a set of design criteria from optimized\nmulti-span DWDM systems.
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