Patent ID: 8687664
Filing Date: 2014-04-01
Classification: H01L,H01S

Abstract:
1. A laser assembly comprising: a substrate, the substrate having a first doped region and a second doped region, the second doped region being proximate to an upper surface of the substrate and forming a pn junction with the first doped region; one or more standoffs; and a semiconductor laser, the semiconductor laser being operative to emit light from an upper surface and a lower surface and being attached to the upper surface of the substrate with the one or more standoffs such that the light emitted from the lower surface of the semiconductor laser impinges on the second doped region; wherein a groove is formed in the upper surface of the substrate entirely within the second doped region, the groove having at least first and second sloped surfaces; wherein the light emitted from the lower surface of the semiconductor laser and impinging on the second doped region impinges on one or more of the sloped surfaces of the groove; wherein the second doped region has a bottom surface substantially parallel to the upper surface of the substrate, the bottom surface being at a first depth from the upper surface of the substrate; and wherein the groove has a maximum depth from the upper surface of the substrate which is less than the first depth.