Sebastian Randel Stephen Corteselli Peter J. Winzer Andrew Adamiecki Alan H. Gnauck S. Chandrasekhar 0001 Anna Bielik Lars Altenhain Tobias Ellermeyer Ulrich Dumler Henning Langenhagen Rolf Schmid Generation of a digitally shaped 55-GBd 64-QAM single-carrier signal using novel high-speed DACs. 1-3 2014 OFC https://doi.org/10.1364/OFC.2014.M2A.3 conf/ofc/2014 db/conf/ofc/ofc2014.html#RandelCWAGCBAED14