Rohde, M.M.RohdeCaspar, C.C.CasparRaub, F.F.RaubBachus, E.-J.E.-J.Bachus2022-03-032022-03-032002https://publica.fraunhofer.de/handle/publica/20201510.1049/el:20020389A new in-channel monitoring technique for transparent networks using a high-frequency digital control signal for optical performance monitoring and channel identification is investigated experimentally. A client independent overhead channel is established that serves as an early warning function for client channel performance degradation due to amplified spontaneous emission noise and self-phase modulation.enoptical fibre networksoptical noiseself-phase modulationsuperradiancetransparent performance monitoringhigh-frequency digital control signaloverhead channelearly warning functionamplified spontaneous emission noiseall-optical networksgroup velocity dispersionchannel identificationclient independent control modulation technique621384journal article