title: High power spiral cavity quantum cascade superluminescent emitter.
abstract: Quantum Cascade devices with an emission wavelength centered around 5 μm have been shaped into compact, yet long (8 mm and 12 mm) spiral cavities to increase mid-infrared superluminescence (SL) power. Up to ~57 mW of SL power at 250 K is obtained with a Gaussian emission spectrum with a full width at half maximum of 56 cm(-1) and a coherence length of ~107 μm.
authors.forename: Mei C
authors.initials: MC
authors.lastname: Zheng
authors.forename: Nyan L
authors.initials: NL
authors.lastname: Aung
authors.forename: Abanti
authors.initials: A
authors.lastname: Basak
authors.forename: Peter Q
authors.initials: PQ
authors.lastname: Liu
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Wang
authors.forename: Jen-Yu
authors.initials: JY
authors.lastname: Fan
authors.forename: Mariano
authors.initials: M
authors.lastname: Troccoli
authors.forename: Claire F
authors.initials: CF
authors.lastname: Gmachl