Embodiments provide a vertical external cavity surface emitting laser
(VECSEL) that may provide a uniform current density in an active layer
using a double current injecting channel. The surface emitting laser
device may include a double channel current injection structure for
uniformly applying current to an active layer, wherein the double channel
current injection structure may include: a first current injection
channel, which may allow current to be injected toward a central portion
of an aperture, which may be a light beam output region formed in the
active layer, and may have a smaller diameter than the aperture: and a
second current injection channel, which may allow current to be injected
toward an edge of the aperture and may be located around the aperture.