title: High-power continuous-wave interband cascade lasers with 10 active stages.
abstract: We report the pulsed and continuous wave (cw) performance of 10-stage interband cascade lasers (ICLs) emitting at both λ ≈3.2 μm and λ ≈3.45 μm. The slope efficiency is higher while the external differential quantum efficiency per stage remains about the same when comparison is made to earlier results for 7-stage ICLs with similar carrier-rebalanced designs. At T = 25°C, an 18-μm-wide ridge with 4.5 mm cavity length and high-reflection/anti-reflection coatings emits up to 464 mW of cw output power with beam quality factor M(2) = 1.9, for higher brightness than has ever been reported previously for an ICL. When the cavity length is reduced to 1 mm, both the 10-stage and 7-stage devices reach 18% cw wallplug efficiency at T = 25°C.
authors.forename: Mijin
authors.initials: M
authors.lastname: Kim
authors.forename: William W
authors.initials: WW
authors.lastname: Bewley
authors.forename: Chadwick L
authors.initials: CL
authors.lastname: Canedy
authors.forename: Chul Soo
authors.initials: CS
authors.lastname: Kim
authors.forename: Charles D
authors.initials: CD
authors.lastname: Merritt
authors.forename: Joshua
authors.initials: J
authors.lastname: Abell
authors.forename: Igor
authors.initials: I
authors.lastname: Vurgaftman
authors.forename: Jerry R
authors.initials: JR
authors.lastname: Meyer