The first monolithic integration of lasers with HFETs and bipolar transistors in inversion channel technology is presented. A threshold current of 2 mA and a slope efficiency of 8 mW/mA was obtained for the bipolar/laser circuit. The transfer characteristic for the integrated HFET/laser converts voltage to output power. The output efficiency for this circuit was 2mW/V, where the voltage was divided across the laser and the HFET.