Patent ID: 6028876
Filing Date: 2000-02-22
Classification: H01S

Abstract:
High power semiconductor laser device comprising:a compound semiconductor substrate;a first graded layer, a first clad layer, a second graded layer, an active layer, a third graded layer and a second clad layer sequentially formed on said substrate by using a first crystal growth;ion-implanted regions formed in said second clad layer, wherein the ion-implanted regions are electrically isolated through high temperature annealing so as to allow gain along a longitudinal of the active layer to be modulated with the same period as the ion-implanted period;a third clad layer, a fourth graded layer and ohmic contact layer sequentially formed on the second clad layer having the ion-implanted regions by using a second crystal growth, wherein these layers are etched until the third graded layer is exposed in order to form a ridge waveguide structure;an insulation layer having current injection window in some portion of top area of the ridge;a first conductivity electrode formed over the entire surface of the insulation layer; anda second conductivity electrode formed on the rear surface of the substrate.