Abstract
A mid-infrared vertical external cavity surface emitting laser (VECSEL) on a Si substrate has been realised. It is optically pumped and emits around 5 mum wavelength. Maximum output power of 26 mW p (limited by the 1.5 m wavelength pump laser) was observed at 100 K operating temperature with 3 s pulse widths. The active part is just a 1.3 m-thick PbTe layer.
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