Hopfer, F.F.HopferMutig, A.A.MutigStrittmatter, A.A.StrittmatterFiol, G.G.FiolMoser, P.P.MoserBimberg, D.D.BimbergShchukina, V.A.V.A.ShchukinaLedentsova, N.N.N.N.LedentsovaLott, J.A.J.A.LottQuast, H.H.QuastKuntz, M.M.KuntzMikhrin, S.S.S.S.MikhrinKrestnikov, I.L.I.L.KrestnikovLivshits, D.A.D.A.LivshitsKovsh, A.R.A.R.KovshBornholdt, C.C.Bornholdt2022-03-102022-03-102008https://publica.fraunhofer.de/handle/publica/35977410.1109/ICIPRM.2008.4703064Recent results on directly modulated VCSELs, including high efficiency 980 nm devices operating error free at 20 Gbit/s without current adjustment between 25 and 85°C, will be reviewed. In addition, a novel electro-optically modulated (EOM) VCSEL concept employing an EOM Bragg reflector based on the Quantum Confined Stark Effect will be proposed and preliminary data presented.en621conference paper