A 40Gbit/s driver module incorporating a set of two original double-di
stributed amplifiers, based on 0.15 mu m GaAs P-HEMT (high electron mo
bility transistor) technology, has been designed and realised. This mo
dule provides a state-of-the-art output driving voltage of near 3Vpp,
into a 50 Omega load, and an 18dB gain over a DC to 41.5GHz bandwidth;
it is able to drive a high speed electroabsorption modulator.