A SINGLE-MODE HIGH-POWER VERTICAL-CAVITY SURFACE-EMITTING LASER

We show how a structural element introduced into a vertical cavity sur face emitting laser (VCSEL) results in the device operating in single stable high-order mode. The results from a 55 mu m diameter device, la mbda = 772 nm, are presented. The stability of the mode structure is i nvestigated as a function of injection current. A simple theory, based on a modal loss discrimination mechanism in VCSELs with slightly pert urbed mirrors, is used to explain the preferred lasing mode in VCSEL s tructures using a central etched well. (C) 1998 American Institute of Physics.