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This work for the first time, experimentally investigated the linewidth enhancement factor (alpha factor) of quantum dot vertical cavity surface emitting laser. alpha factor values between 0.48 and 0.60 were measured.
This investigation experimentally demonstrates tunable slow light in a quantum well vertical-cavity surface-emitting laser at 40 GHz. Tunable optical delays are achieved by adjusting the bias current and wavelength detuning.
We report the recent progress of GaN-based VCSELs with a hybrid cavity structure comprised an epitaxial AlN/GaN DBR with superlattice insertion layers, an InGaN/GaN MQW active region and a top dielectric DBR. The lasers achieved laser action under optical pumping at the room temperature with a narrow linewidth. The preliminary results of the electrically pumped VCSEL will also be presented.
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