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Highly efficient (1.2 mW/mA, >70% CW differential quantum efficiency), top-surface-emitting, vertical cavity lasers are achieved at room temperature. Buried damage layers by proton implantation are used for efficient current funnelling. The CW threshold currents are 3.5-8.0 mA, at 3.7-4.2 V bias, for 10-30 mu m diameter lasers. The lasing wavelengths are 845-848 nm.<<ETX>>
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