AlGaAs/GaAs multiquantum-well (MQW) laser applied to monolithic integration with FET driver

A ridge-waveguide AlGaAs/GaAs multiquantum-well (MQW) laser has been monolithically integrated with two MESFETs on a semi-insulating GaAs substrate. The laser was grown in an etched groove to realise a nearly planar horizontal arrangement with FETs. This MQW laser was found to successfully achieve a CW operation with a lowthreshold current of 20 mA at room temperature.