Summary form only given. We report on the improved performance of InGaAs MQW vertical cavity (VCSEL) lasers with tapered oxide apertures positioned 50nm from the quantum wells. A vertical cavity laser with 2 /spl mu/m opening has a threshold of 145 /spl mu/A and an external differential efficiency of 55%. The good slope efficiency combined with low-threshold is made possible by reduced current spreading and low optical scattering losses.
Low-threshold, efficient vertical cavity lasers with tapered apertures
01.01.1998
170734 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Low-Threshold, Efficient Vertical Cavity Lasers with Tapered Apertures
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