40 Gbit/s optical communications: InP DHBT technology, circuits and system experiments

To address the needs for very high speed electronic circuits for high bit-rate optical communications, we have developed an InP DHBT self-aligned process with f/sub T/ and f/sub MAX/ of 130 and 150 GHz; 40 Gb/s circuits, such as a 2:1 and 4:1 multiplexer and a 2:1 MUX-driver have been fabricated, characterized and assessed in system experiments.