Meuer, ChristianKim, JoungmokLaemmlin, M.Liebich, S.Bimberg, DieterCapua, AmirEisenstein, GadiBonk, RenéVallaitis, ThomasLeuthold, JuergKovsh, A. R.Krestnikov, Igor L.2022-01-202022-01-202008-08-060003-6951https://depositonce.tu-berlin.de/handle/11303/16178http://dx.doi.org/10.14279/depositonce-14952This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 93, 051110 (2008) and may be found at https://doi.org/10.1063/1.2969060.Small-signal cross-gain modulation of quantum dot based semiconductor optical amplifiers (QD SOAs), having a dot-in-a-well structure, is presented, demonstrating superiority for ultrahigh bit rate wavelength conversion. Optimization of the QD SOA high speed characteristics via bias current and optical pump power is presented and a small-signal 3 dB bandwidth exceeding 40 GHz is demonstrated. The 𝑝-doped samples investigated here enable small-signal wavelength conversion within a range of 30 nm, limited mainly by the gain bandwidth.en530 Physikquantum opticssemiconductor optical amplifierstelecommunications engineeringelectronic transportsignal processingmechanical stressfiber optic devicesquantum dotsquantum wellsspectral hole burningArticle1077-3118