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US 5,495,492 AGranted
Semiconductor laser having an active layer with a fan-shaped stripe with curved end surfaces
AssigneeSony Corporation
InventorAtsushi Toda
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Abstract
A semiconductor laser including a semiconductor substrate, having first and second cladding layers thereon semiconductor substrate, and an active layer sandwiched between the first and second cladding layers. The active layer has on one end a convex first resonating surface and on the other end a concave second resonating surface. The first and second resonating end surfaces of the active layer are parallel to each other, and a portion of the length of the first resonating end surface is greater than a portion of the length of S2 of the second resonating end surface corresponding to the former.
Claims10
A semiconductor laser comprising:
- (a) a semiconductor substrate;
- (b) first and second cladding layers on said semiconductor substrate;
- (c) an active layer having a fan-shaped strip part with a tapering width being sandwiched between the first and second cladding layers;
- and
- (d) a convex first resonating end surface and a concave second resonating end surface formed on both ends of said strip part of the active layer, respectively, said first and second resonating end surfaces being concentric surfaces,
- a length of a portion S1 of said first resonating end surface being greater than a length of a portion S2 of said second resonating end surface so that the tapering width of the strip part decreases from the convex first resonating end surface to the concave second resonating end surface.
3 more elements
Dependencies are inferred from the claim text.