Patent ID: 7953135
Filing Date: 2011-05-31
Classification: H01S

Abstract:
1. A VCSEL device, comprising: a semiconductor Bragg reflector; a semiconductor active layer formed on said semiconductor Bragg reflector; a junction region provided on said active layer and configured to confine a current injected into said active layer, said junction region including a pn junction; a semiconductor layer provided on said junction region; and a dielectric Bragg reflector provided on said semiconductor layer, said dielectric Bragg reflector including a first layer directly coming in contact with said semiconductor layer and a second layer provided on said first film, wherein said first layer has a refractive index greater than a refractive index of said second layer, wherein said first layer of said dielectric Bragg reflector includes a first dielectric film and a second dielectric film, said first dielectric film directly coming in contact with said semiconductor layer, wherein said second dielectric film has a refractive index smaller than a refractive index of said first dielectric film and greater than said refractive index of said second layer, and wherein said first layer has a thickness of λ/4/n where d