Applied Physics Letters · 1992 · 75 citations · 14 references
EngineeringElectrical EngineeringPhysicsOptoelectronicsPhotonicsSemiconductor DevicesHigh-frequency Semiconductor DevicesLaser DiodesLaser PhysicsNanoelectronicsOptical SourcesSemiconductor LasersArray TypesDifferential EfficiencyDifferential Quantum EfficiencyHigh-power LasersLaser ThresholdPower OutputQuantum EfficiencyVertical-cavity Surface-emitting Lasers
We demonstrate record high pulsed output power exceeding 530 mW from an electrically pumped phase-coupled 8×8 vertical cavity surface emitting laser array (SELA) at room temperature. Three array types are compared: an 8×8 pixellated SELA(PSELA), an 8×8 grid contact SELA(CSELA), and a 78 μm×78 μm single broad area SEL(BSEL) emitter. The CSELA operating in a phase-coupled supermode exhibits the lowest threshold current (100 mA) and voltage (1.6 V), highest damage threshold and a smooth L-I characteristic with differential quantum efficiency ηd≳27%, the BSEL has the largest output power≳580 mW and a large ηd≳48%, the PSELA exhibited a large voltage with the largest ηd≳80%.
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