VERTICAL EXTERNAL CAVITY SURFACE EMITTING LASER AND METHOD THEREOF

摘要

A vertical external cavity surface emitting laser ("VECSEL"). The VECSEL includes a light-emitting device, a second harmonic generation ("SHG") crystal and an external cavity mirror. The light-emitting device includes a mirror layer limiting a resonance region, an active layer generating light, a heat spreader dissipating heat generated in the active layer, and a micro lens coupled to the heat spreader and including a convex outer surface to focus light. The second harmonic generation crystal converts the frequency of light focused by the micro lens. The external cavity mirror transmits the light converted by the second harmonic generation crystal and outputs the transmitted light as laser light, and reflects unconverted light back to the mirror layer to resonate the light.