Abstract
Continuous wave (CW) operation at room temperature of electrically pumped InGaAlAs/InP vertical-cavity surface-emitting lasers (VCSELs) at emission wavelengths as high as 2.3 µm is demonstrated for the first time. Devices with 15 µm active region diameter show a maximum output power of 0.75 mW at 20°C and a maximum CW operating temperature of 45°C.
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