Applied Physics Letters · 1977 · 23 citations · 11 references
EngineeringElectrical EngineeringMaterials ScienceOpticsOptoelectronicsPhotonicsLaser DiodesLaser PhysicsOptical SourcesOptical WaveguidesPhotonic Integrated CircuitsSemiconductor LasersBragg ScatteringDistributed Bragg Reflector LasersHigh-power Laser DiodesHigh-power Semiconductor LasersSemiconductor Laser DiodesThreshold BehaviorWaveguide Lasers
Highly collimated laser beams have been observed to be coupled out by second-order Bragg scattering from GaAs distributed Bragg reflector lasers. The beams are perpendicular to the waveguide plane and have an angular width of less than 1°. The diodes have a separate confinement structure and operate at room temperature with thresholds as low as 1.4 kA/cm2.
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