An SiGe 2:1 time-division multiplexer (MUX) with high output power was developed for directly driving an electroabsorption modulator (EAM) in a 40 Gbit/s optical fibre link. The essential advantages compared to usual driver circuit concepts are discussed and experimentally demonstrated. Measurements on mounted chips show clear output eye diagrams at 40 and 50 Gbit/s with voltage swings of 2.5 and 2 Vpp, respectively.
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Möller et al. (1998) studied this question.