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
Image forming apparatus and method of translating virtual memory address into physical memory address
Ejection station
Access control method, information display device using the same, and information display system
Antenna for an automobile
Fuser member
Fusing apparatus and image forming apparatus provided with the same, and heating apparatus
Developing device
  Randomly Featured Patents
Clipboard having a calculator mounted thereon
Optical head for information recording apparatus
Stone and mounting gauge
Voice recording/reproducing apparatus
Lens component, image forming optical system, and electronic image pickup apparatus using the same
Magnetic recording medium having a magnetic layer containing abrasive particles
Submergible detonating device
Cephem compounds
Systems and methods for determining location information using dual filters