Development of PCSEL-Array Module Towards Metal 3D Printing Applications

We develop a PCSEL-array module towards metal 3D printing applications. We develop a module with four 3-mm-diameter PCSELs, which are mounted on a heat sink in a $\mathbf{2}\times \mathbf{2}$ arrangement while electrically connected in series, and achieve 200-W output power under CW conditions. This result suggests that the output power can be further increased to one kilowatt and beyond by increasing the number of PCSEL elements.