160°C CW operation of InGaAs/GaAs vertical cavity surface emitting lasers

Abstract
A CW operation temperature of 160 °C is demonstrated in InGaAs/GaAs double quantum well vertical cavity surface emitting lasers (VCSELS). The effect of offset-gain is considered in the design, and wet chemical etching is employed for forming the mesastructure to reduce surface recombination. A low threshold current of 5.2 mA is achieved at 160 °C.

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