A method and arrangement for a reduction of the spectral - hole - burning

摘要

A wdm - signal is more sub-bands (sub1 - sub4) associated with it, the channel spacing in each sub-band be correspondingly enlarged. As a result, the spectral - hole - burning, is considerably reduced, since this effect is limited to the adjacent channels. In an advantageous amplifier arrangement, first of all the complete wdm - signal preamplified, takes place before the division into sub-bands.