A strained GaAs/AlGaAs/InGaAs MQW laser has been monolithically integr
ated with GaAs MESETs in a differential pair configuration to form a t
ransmitter circuit. The structure used a single epitaxial growth step
in which the laser was grown on top of the MESFET. The circuits operat
e with bandwidths as high as 3.4GHz.