Patent ID: 6104738
Filing Date: 2000-08-15
Classification: H01S

Abstract:
A semiconductor laser device comprising a substrate and a multi-layer structure formed on the substrate, wherein:the multi-layer structure includes an optical waveguide region having at least an active layer and a burying layer for burying peripheries of the optical waveguide region, the optical waveguide region being formed in stripes along a cavity length direction;a stripe width of the optical waveguide region is such that a width W1 at a front end face and a width W2 at a rear end face satisfy a relationship of W1<W2;the stripe width continuously varies between the width W1 and the W2 along the cavity length direction, thereby generating laser light with a very narrow beam divergence; andthe optical waveguide region further comprises a light confinement layer adjoining the active layer.