Schubert, C.C.SchubertFischer, J.K.J.K.FischerSchmidt-Langhorst, C.C.Schmidt-LanghorstElschner, R.R.ElschnerMolle, L.L.MolleNölle, M.M.NölleRichter, T.T.Richter2022-03-122022-03-122012https://publica.fraunhofer.de/handle/publica/37785810.1364/ECEOC.2012.We.1.C.1To satisfy the increasing capacity demand in today's networks, in particular exceeding 100 Tbit/s per fiber, pose a severe challenge. This paper gives an overview of the concepts currently investigated to meet this challenge, including modulation formats, digital signal processing, elastic optical networks and multi-mode / multi-core transmission.en621conference paper