High-temperature operation of electrical injection type-II (GaIn)As/Ga(AsSb)/(GaIn)As "w"-quantum well lasers emitting at 1.3 μm

Electrical injection lasers emitting in the 1.3 μm wavelength regime based on (GaIn)As/Ga(AsSb)/(GaIn)As type-II double "W"-quantum well heterostructures grown on GaAs substrate are demonstrated. The structure is designed by applying a fully microscopic theory and fabricated using metal organic vapor phase epitaxy. Temperature-dependent electroluminescence measurements as well as broad-area edge-emitting laser studies are carried out in order to characterize the resulting devices. Laser emission based on the fundamental type-II transition is demonstrated for a 975 μm long laser bar in the temperature range between 10 °C and 100 °C. The device exhibits a differential efficiency of 41 % and a threshold current density of 1.0 kA/cm² at room temperature. Temperature-dependent laser studies reveal characteristic temperatures of T₀ = (132 ± 3) K over the whole temperature range and T₁ = (159 ± 13) K between 10 °C and 70 °C and T₁ = (40 ± 1) K between 80 °C and 100 °C.