Multiple level modulation in a wavelength-division multiplexing (WDM) systems

Abstract

Optical signals modulated with data are transmitted into a fiber link having a property of including nonlinear distortion of the optical signals as a function of signal power of the optical signals and distance traversed in the fiber link. The data is formatted with multiple-level signaling having a preselected M value to produce formatted data signals. The formatted data signals are multiplexed to produce wavelength-division multiplex (WDM) channels each carrying optical signals based on the formatted data signals. The preselected M value is based on signal jitter and maximum signal power.

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