DWDM signals noise immunity evaluation in a nonlinear fiber-optic path

The total influence of self-phase modulation, phase cross-modulation and four-wave mixing effects and am-
plified spontaneous emission noise on transmitted pulsed signals noise immunity in a multichannel fiber-
optic transmission system with spectral division multiplexing is investigated. The investigation is carried out
under the conditions of transmitting system parameters variation: the total optical power level in optical fi-
ber, the transmission speed and the number of spectral channels. The estimate criterion of transmitted pulsed
signals noise immunity is Q-factor. The total Q-factor value dependence on the total optical power level in
optical fiber for various transmission speed and the number of spectral channels is demonstrated

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