Aimone, A.A.AimoneDris, S.S.DrisSundermeyer, J.J.SundermeyerChoi, J.H.J.H.ChoiZerna, C.C.ZernaRichter, A.A.RichterVelthaus, K.-O.K.-O.Velthaus2022-03-142022-03-142018https://publica.fraunhofer.de/handle/publica/40753110.1109/ICTON.2018.8473731A programmable InP-based Tbit optical-DAC transmitter is discussed. Through electro-optic co-design and simulation of the transmitter's components, the performance is evaluated. The comparison with a traditional DAC plus linear driver approach is presented, with a significant advantage of the optical DAC for complex modulation schemes. Low power (1.3 pJ/bit) transmission of a 56 Gbaud dual-polarization probabilistically-shaped 256-QAM signal is shown.en621conference paper