Abstract
Vertical-cavity surface-emitting laser (VCSEL) arrays are promising light sources for laser-printer applications. Two types of the raster output scanning (ROS) systems with VCSEL array for the laser printer are introduced, and VCSEL arrays for each ROS systems are shown. Also demonstrated are the properties of the VCSEL arrays. From viewpoint of high-speed and high-resolution printer applications, high optical output power is required for single- and fundamental-transverse mode VCSELs. For the requirement, thetransversemode-controlled VCSELs with output aperture by metal electrode are shown to achieve the outputpower as high as 3.4 mW at 780nm. For reproducibility and uniformity of the device performance, the oxidation process of AlAs which confines a current injection is in-situ monitored via optical reflectivity from the VCSEL substrate.
