title: Quantum cascade laser master-oscillator power-amplifier with 1.5 W output power at 300 K.
abstract: We report quantum cascade laser (QCL) master-oscillator power-amplifiers (MOPAs) at 300 K reaching output power of 1.5 W for tapered devices and 0.9 W for untapered devices. The devices display single-longitudinal-mode emission at λ = 7.26 µm and single-transverse-mode emission at TM(00). The maximum amplification factor is 12 dB for the tapered devices.
authors.affiliation: Harvard University, School of Engineering and Applied Sciences, 29 Oxford St., Cambridge, MA 02138, USA.
authors.forename: Stefan
authors.initials: S
authors.lastname: Menzel
authors.forename: Laurent
authors.initials: L
authors.lastname: Diehl
authors.forename: Christian
authors.initials: C
authors.lastname: Pflügl
authors.forename: Anish
authors.initials: A
authors.lastname: Goyal
authors.forename: Christine
authors.initials: C
authors.lastname: Wang
authors.forename: Antonio
authors.initials: A
authors.lastname: Sanchez
authors.forename: George
authors.initials: G
authors.lastname: Turner
authors.forename: Federico
authors.initials: F
authors.lastname: Capasso