Kreissl, J.J.KreisslVercesi, V.V.VercesiTroppenz, U.U.TroppenzGaertner, T.T.GaertnerWenisch, W.W.WenischSchell, M.M.Schell2022-03-042022-03-042012https://publica.fraunhofer.de/handle/publica/22883410.1109/LPT.2011.2179530A directly modulated 1.55-m buriedheterostructure passive feedback laser exhibits a high modulation bandwidth of up to 34 GHz at moderate distributed-feedback (DFB) section currents between 20 and 60 mA. A very flat frequency response and a low alpha parameter have been demonstrated in the small signal modulation analysis. The device has open eyes at data rates of 25 and 40 Gb/s with reduced frequency chirp.en621535journal article