Analysis of threshold current density in 2•2 μm GaInAsSb/GaAlAsSb.GaSb DH lasers

From comparison of published experimental data with a theoretical model of GaInAsSb/GaAlAsSb/GaSb DH lasers emitting at 2.2 μm, the Auger coefficient of the active material has been determined to be C ≈ 10−28 cm6S−1. A threshold current density as low as 2 kA/cm2 is expected at 300 K for such a DH with a 0.3 μm-thick active layer and confinement layers with a high aluminium content (x = 0.6).