MULTIPLE LEVEL MODULATION IN A WAVELENGTH-DIVISION MULTIPLEXING (WDM) SYSTEMS

摘要

Optical signals modulated with data are transmitted into a fibre link having a property of including non linear distortion of the optical signals as a function of signal power of the optical signals and distance traversed in the fibre link. The data is formatted with multiple level signalling (such as PPM or PSK) having a preselected value M to produce formatted data signals. The formatted data signals are formatted to produce Wavelength Division Multiplex (WDM) channels each carrying optical signals based on the formatted data signals. The preselected value M is based on signal jitter and maximum signal power.