Patent ID: 9478944
Filing Date: 2016-10-25
CPC Classification: H01S

Claim Text:
1. A semiconductor laser element, comprising: an active layer; a window region including a disordered portion formed by diffusion of a group-III vacancy, the window region including an impurity free disordered portion of the active layer; a non-window region including a portion of the active layer having a quantum well structure; a layer near the active layer, the layer being doped with a p-impurity an impurity that preferentially substitutes a group-V site; a layer including zinc and being formed above the layer near the active layer, and a contact layer made of only GaAs and dopants and formed above the active layer to inject a carrier into the active layer, wherein the GaAs contact layer includes the layer including zinc, and the GaAs contact layer includes a first GaAs contact layer doped with the p-impurity that preferentially substitutes the group-V site and a second GaAs contact layer which is the layer including zinc and being formed above the first GaAs contact layer.