GaInAsP/InP SBH surface emitting laser with Si/Al2O3 mirror

Abstract
An Si/Al2O3 mirror has been introduced into the p-side mirror of a 1.3 µm GaInAsP/InP square buried heterostructure (SBH) surface emitting (SE) laser to decrease thermal resistance. The low threshold pulsed oscillation (threshold current Ith = 12 mA) has been obtained for an 8 × 8 µm device at room temperature. Its threshold current density was ~18 kA/cm2. Near room temperature (13°C) CW oscillation for another chip has also been realised.