Resources Contact Us Home
Vertical cavity surface emitting laser

Image Number 16 for United States Patent #8077752.

A Vertical Cavity Surface Emitting Laser (VCSEL) capable of providing high output of fundamental transverse mode while preventing oscillation of high-order transverse mode is provided. The VCSEL includes a semiconductor layer including an active layer and a current confinement layer, and a transverse mode adjustment section formed on the semiconductor layer. The current confinement layer has a current injection region and a current confinement region. The transverse mode adjustment section has a high reflectance area and a low reflectance area. The high reflectance area is formed in a region including a first opposed region opposing to a center point of the current injection region. A center point of the high reflectance area is arranged in a region different from the first opposed region. The low reflectance area is formed in a region where the high reflectance area is not formed, in an opposed region opposing to the current injection region.

  Recently Added Patents
Disk-based storage device having read channel memory that is selectively accessible to disk controller
Buck converter having reduced ripple under a light load
Food safety printer
Hybrid coatings and associated methods of application
Systems and methods for building axes, co-axes and paleo-geographic coordinates related to a stratified geological volume
Hair care composition
  Randomly Featured Patents
Segmented architecture for multiple sequence detection and identification with frequency offset compensation
Active secondary exposure mask to manufacture integrated circuits
Traveling wave deflector for electron beams
Air conditioner
Automatic hair brush
Delta-sigma modulation circuits and methods utilizing multiple noise attenuation bands and data converters using the same
Concrete hole brush apparatus
Device, system, and method for remediation of contaminated soil
Liquid crystal composition and liquid crystal display device
Supporter for sanding device