A monolithically integrated photoreceiver is presented, based on a new
integration concept comprising a waveguide integrated photodiode and
a travelling wave GaInAs/AlInAs-HEMT amplifier. A record 3 dB bandwidt
h of 27 GHz is measured and a clearly open eye is obtained for a 20 Gb
it/s pseudo-random bit stream. This high speed performance was achieve
d with photolithographically defined 0.7 mu m gate length HEMTs, regro
wn by MBE on semi-insulating GaInAsP waveguide layers.