Phys.org  June 27, 2023 Large-area lasers that emit high output powers have lower beam quality due to the introduction of higher-order modes. An international team of researchers (Turkey, USA – Michigan Technological University) has demonstrated a new type of electrically pumped, large-area edge-emitting lasers that exhibited a high-power emission and a high-quality beam. These characteristics were enabled by establishing a quasi PT-symmetry between the second-order mode of a large area two-mode laser cavity and a single-mode auxiliary partner cavity. This in turn enlarges the effective volume of the higher-order modes. As a result, a selective pump applied via current injection […]