InGaAsP/InGaAlAs 1.55 /spl mu/m strain-compensated MQW BH lasers with 12.5 GHz cut-off frequency at 90/spl deg/C

1.55 /spl mu/m strain-compensated multi-quantum-well buried heterostructure lasers with InGaAsP quantum wells and InGaAlAs barriers were fabricated, yielding high optical power at low threshold currents. At 90/spl deg/C they support a direct modulation with 12.5 GHz.