We designed, fabricated, and characterized thermal performances of Fabry-Pérot quantum-dot lasers with both metal-coated and conventional dielectric waveguides. With proper design, metals, such as Ag, Au, Cu, and Al can function as a low loss waveguide wall as well as an efficient heat remover. Metal-cavity waveguide lasers showed excellent threshold and characteristic temperature working above 120 °C, while dielectric waveguide lasers ceased operation near 80 °C under the same conditions. The thermal analysis of these lasers showed that metal-cavity lasers have approximately 1.5 times higher thermal conductivity compared with those of the dielectric lasers. We believe that the metal-coating of waveguides and the proper selection of metal efficiently remove the heat from the active region and enable stable lasing operation at high temperature.
© 2012 Optical Society of America
Lasers and Laser Optics
Original Manuscript: May 3, 2012
Manuscript Accepted: June 4, 2012
Published: August 3, 2012
A. Matsudaira, C.-Y. Lu, T. O’Brien, and S. L. Chuang, "Metal-cavity quantum-dot lasers with enhanced thermal performance," Opt. Lett. 37, 3297-3299 (2012)