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Abstract-We report on the development of a submicron InP DHBT technology, optimized for the fabrication of ≥50-GHzclock mixed-signal ICs. In-depth study of device geometry and structure has allowed to get the needed performances and yield. Special attention has been paid to critical thermal behavior. Various size submicron devices have been modeled using UCSD-HBT equations. These large signal models have allowed the design of 50-GHz clocked 50G Decision and 100G Selector circuits. The high quality of the measured characteristics demonstrates the suitability of this technology for the various applications of interest, like 100 Gbit/s transmission.

Amplificateur à fibre dopée à l'erbium Format de modulation Photonique Limite de Shannon Multiplexage en longueur d'onde Télécommunications optiquesThe state of the art of XXIst century optical communication systems is reviewed through the associated technologies of laser sources, photo-receivers, integrated photonic circuits, optical fibres, and coherent modulation formats. Emphasis is put on current science and technology challenges to approach ultimate physical limits and to develop innovative solutions allowing performance enhancement at minimal cost increase.