Optically pumped semiconductor quantum dot disk laser operating at 1180 nm

We demonstrate an optically pumped semiconductor disk laser using 39 layers of Stranski–Krastanov InGaAs quantum dots self-assembled during epitaxial growth on a monolithic GaAs⁄AlAs distributed Bragg reflector. The gain structure bonded to an intracavity diamond crystal heat spreader allows 1.75 W single-transverse-mode output (푀2<1.2) with circular beam shape operating at 1180 nm in a disk laser geometry.