公开(公告)号：US20210203415A1

公开(公告)日：2021-07-01

申请号：US16070139

申请日：2018-03-19

Applicant: Xieon Networks S.a.r.l.

Inventor： Juraj SLOVAK ,  Wolfgang SCHAIRER ,  Maximilian HERRMANN ,  Enrico TORRENGO

IPC: H04B10/079

Abstract: A method of determining contributions of different sources of signal degradation for optical signals transmitted over an optical link in an optical transmission system, comprising measuring a performance value (P) of a signal transmission on said optical link, deriving, from the performance value, an auxiliary noise power value (PN) based on a predetermined relationship between the performance value (P) and the auxiliary noise power value (PN), wherein the auxiliary noise power value (PN) comprises contributions of amplified spontaneous emission power (PA) generated on the optical link and a link-related equivalent noise power contributions (PL) representing other sources of signal degradation upon transmission on the optical link, measuring or deriving an OSNR-related value (Q) for the signal transmission on the optical link, wherein the OSNR-related value (Q) corresponds to or is at least indicative of an actual OSNR on the optical link, and distinguishing, based on the auxiliary noise power value (PN) and on the OSNR-related value (Q) between noise power contributions of amplified spontaneous emission and link-related equivalent noise power contributions.