Method for controlling a pump unit while optically amplifying a transmitted wavelength multiplex (WDM) signal

摘要

The invention relates to a novel method for controlling a pump unit of a fiber amplifier, with which a transmitted wavelength multiplex (WDM) signal is amplified by at least a distribution of output powers of a plurality of pump sources in order to achieve a favorable noise figure of the amplified WDM signal at a variable required overall pump power. The output powers are distributed using modulation characteristics for the pump sources depending on the overall pump power required for amplification. The modulation characteristics influence the respective inversions in the fiber amplifier in such a manner that a minimum noise figure is achieved for all channels of the WDM signal at a constant gain.