Patent ID: 6665324
Filing Date: 2003-12-16
Classification: H01S

Abstract:
A semiconductor laser unit comprising:a semiconductor laser device including a stripe structure, a first optical guide layer of a first conductivity type, an active layer, a second optical guide layer of a second conductivity type, wherein each layer of the semiconductor laser device has a surface; and a heat sink; wherein a total thickness of said first and second optical guide layers is equal to or more than 0.5 micrometers, and said semiconductor laser device is soldered onto said heat sink at a surface of the semiconductor laser device, where said surface to be soldered is the surface farthest away from said active layer of all of said surfaces of the semiconductor laser device, wherein the total thickness of said first and second optical guide layers is greater than or equal to 0.5 micrometers and less than or equal to 1.2 micrometers.