Abstract
To overcome the serious current crowding effect in top-emitting vertical cavity surface emitting lasers (VCSELs) with large aperture, a distributed-ring-contact (DRC) VCSEL is proposed and demonstrated. A maximal cw light output power of more than and a wall-plug efficiency of 17.4% are achieved for a -diameter VCSEL. The DRC VCSEL exhibits a more homogeneous emission profile, and the laser emits at with a narrow spectrum (less than FWHM).
© 2011 Optical Society of America
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