%0 Journal Article %J APPLIED PHYSICS LETTERS %D 2012 %T Double-waveguide quantum cascade laser %A Blanchard, Romain %A Grezes, Cecile %A Menzel, Stefan %A Pfluegl, Christian %A Diehl, Laurent %A Huang, Yong %A Ryou, Jae-Hyun %A Dupuis, Russell D. %A Federico Capasso %X We demonstrate 1.1W peak power at room-temperature from a double-waveguide quantum cascade laser (QCL) grown by metal-organic chemical vapor deposition. Two full broadband QCL active regions were grown on top of each other separated by thick cladding layers to reduce gain competition. Simultaneous lasing on Fabry-Perot modes separated by as much as 360 cm(-1) is obtained. This design paves the way for high-brightness broadband mid-infrared sources, as well as more complex three-terminal devices. (C) 2012 American Institute of Physics. [doi:10.1063/1.3678033] %B APPLIED PHYSICS LETTERS %I AMER INST PHYSICS %C 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA %V 100 %8 JAN 16 %G eng %N 3 %9 Article %R 10.1063/1.3678033