Patent ID: 6449298
Filing Date: 2002-09-10
Classification: H01S

Abstract:
A semiconductor laser device comprising:a first waveguide layer, an active layer, a second waveguide layer, and a striped region, which is formed on a substrate and comprises lower and upper striped regions, wherein the lower striped region comprises the first waveguide layer, and the upper striped region comprises the active layer and the second waveguide layer formed on the active layer; and a plurality of burying semiconductor layers formed on the sides and upper surface of the striped region, wherein at least one of the burying semiconductor layers is doped with zinc, and wherein the sides of the upper striped region have a plane orientation approximately represented as (0-11) and the sides of the lower striped region have a plane orientation approximately represented as (h-11)B, where h is an integer equal to or larger than 1.