Low threshold lasing operation of narrow stripeoxide-confinedGaInNAs/GaAs multiquantum well lasers at 1.28 µm

Abstract

The realisation is reported of oxide-confined narrow-stripe lasers incorporating GaInNAs/GaAs multiquantum wells (MQWs) grown by MBE using an RF nitrogen plasma source. Two oxidation layers are employed to achieve proper current confinement and waveguiding. These lasers, emitting close to 1300 nm, show record threshold currents as low as 11 mA. Slope efficiencies of 0.39 W/A and 15 mW output power at 120°C under pulsed operation demonstrate the high potential of the GaInNAs active material.