57% wallplug efficiency oxide-confined 850 nm wavelength GaAs VCSELs

Vertical-cavity surface-emitting lasers with reduced effective index guiding of the optical wave show a record performance. GaAs based 850 nm emission wavelength VCSELs are fabricated using solid source MBE and carbon p-type doping. Depending on device design maximum room temperature conversion efficiencies of 57%, an operating range from -80/spl deg/C up to +185/spl deg/C, and threshold currents below 500 /spl mu/A from -40 to +80/spl deg/C have been obtained.

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