A 50-Gbit/s demultiplexer IC module that uses 0.1-mum InAlAs/InGaAs/InP HEM
Ts is reported. The maximum error-free operation bit-rate of a fabricated m
odule is 50 Gbit/s, and a wide phase margin of 170 degrees is obtained at 4
3 Gbit/s. 50-Gbit/s demultiplexing is the fastest performance of all packag
ed demultiplexer ICs yet reported.