Patent ID: 6717969
Filing Date: 2004-04-06
Classification: H01S

Abstract:
A semiconductor laser device comprising:a substrate; an active layer formed above said substrate; a current confinement structure which is realized by p-type and n-type layers being formed above said active layer and including a current stopping layer which has an opening for allowing current injection into only a predetermined stripe region of the active layer; a semiconductor layer formed above said current confinement structure; a pair of trenches formed on both sides said opening along said predetermined stripe region so as to extend from said semiconductor layer through said current stopping layer to at least said active layer; an insulation film formed on said semiconductor layer except that an area of the semiconductor layer located right above said predetermined stripe region is not covered by the insulation film; and an electrode formed on said area of the semiconductor layer, wherein said pair of trenches are separated by an interval of 100 micrometers or smaller.