Patent ID: 7885307
Filing Date: 2011-02-08
Classification: H01S

Abstract:
1. A vertical-cavity surface-emitting laser (VCSEL) device comprising: a substrate; and a layer structure formed on said substrate and including top and bottom DBR mirrors, an active layer sandwiched therebetween, and a current confinement oxide layer disposed within or in a vicinity of one of said top and bottom DBR mirrors and including therein a central current confinement area, wherein: at least a portion of said layer structure including said current confinement oxide layer is configured as a mesa post with a generally cylindrical outer periphery; at least a part of a sidewall of said mesa post in a vicinity of said current confinement oxide layer has plural protrusions on portions of said generally cylindrical outer periphery, before the mesa post is subjected to an oxidizing heat treatment, wherein each of said plural protrusions protrudes in a direction to a crystal surface having a higher oxidation rate.