80 Gbit/s multiplexer IC using InAlAs/InGaAs/InP HEMTs

A 64 Gbit/s 2:1 selector-type multiplexer IC using InAlAs/InGaAs/InP HEMTs is reported. The record operating data rate was measured on a wafer. The IC was mounted on a dedicated IC package and operated beyond 52 Gbit/s.