Invention Grant
US09042421B2 Surface emitting laser, surface emitting laser array, and optical apparatus having surface emitting laser array 有权
表面发射激光器,表面发射激光器阵列和具有表面发射激光器阵列的光学装置

Surface emitting laser, surface emitting laser array, and optical apparatus having surface emitting laser array
Abstract:
There is provided a surface emitting laser allowing a direction of a far-field pattern (FFP) centroid to be inclined from a normal direction of a substrate providing the surface emitting laser, comprising: a substrate; a lower reflecting mirror, an active layer, an upper reflecting mirror stacked on the substrate; and a surface relief structure located in an upper portion of a light emitting surface of the upper reflecting mirror, the surface relief structure being made of a material allowing at least some beams emitted from the surface emitting laser to be transmitted therethrough, a plurality of regions having a predetermined optical thickness in a normal direction of the substrate being formed in contact with other region in an in-plane direction of the substrate, and a distribution of the optical thickness in the in-plane direction of the substrate is asymmetric to a central axis of the light emitting regions.
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