High efficiency, single-lobe surface-emitting DFB/DBR quantum cascade lasers.


We demonstrate a surface-emitting quantum cascade laser (QCL) based on second-order buried distributed feedback/distributed Bragg reflector (DFB/DBR) gratings for feedback and outcoupling. The grating fabricated beneath the waveguide was found to fundamentally favor lasing in symmetric mode either through analysis or experiment. Single-lobe far-field… (More)
DOI: 10.1364/OE.24.019545


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