Multi-junction vertical-cavity surface-emitting lasers in the 800-1100nm wavelength range

Recently, there has been some interest in multi-junction vertical-cavity surface-emitting lasers (VCSELs) due to their scaling properties. In particular the power density and power conversion efficiency (PCE) can be significantly increased. A PCE in excess of 63% has been demonstrated for multi-junction VCSELs, as well as a peak output power of 1kW from chips as small as 1mm^2. Multi-junction VCSELs thus present many interesting opportunities and we will review our development efforts of this technology across the near-infrared wavelength range of 800-1100nm, and covering several applications including the industrial, automotive (LIDAR in particular), and consumer fields.