title: Gain-guided broad area quantum cascade lasers emitting 23.5 W peak power at room temperature.
abstract: We report gain-guided broad area quantum cascade lasers at 4.55 μm. The devices were processed in a buried heterostructure configuration with a current injector section much narrower than the active region. They demonstrate 23.5 W peak power at a temperature of 20°C and duty cycle of 1%, while their far field consists of a single symmetric lobe centered on the optical axis. These experimental results are supported well by 2D numerical simulations of electric currents and optical fields in a device cross-section.
authors.forename: Ilia
authors.initials: I
authors.lastname: Sergachev
authors.forename: Richard
authors.initials: R
authors.lastname: Maulini
authors.forename: Alfredo
authors.initials: A
authors.lastname: Bismuto
authors.forename: Stephane
authors.initials: S
authors.lastname: Blaser
authors.forename: Tobias
authors.initials: T
authors.lastname: Gresch
authors.forename: Antoine
authors.initials: A
authors.lastname: Muller