Reverse-Taper Mid-Infrared Quantum Cascade Lasers for Coherent Power Scaling

Reverse-Taper Mid-Infrared Quantum Cascade Lasers for Coherent Power Scaling

We present a reverse-taper quantum cascade laser (QCL) emitting at 4.6 μm, a novel-geometry device that can scale the output power while maintaining good beam quality. Buried-ridge waveguides with tapered and straight regions were formed by ICP etching and HVPE regrowth - the tapered region scales t...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:IEEE photonics journal 2022-06, Vol.14 (3), p.1-6
Hauptverfasser: Ryu, Jae Ha, Knipfer, Benjamin, Kirch, Jeremy D., Marsland, Robert A., Botez, Dan, Earles, Tom, Galstad, Chris, Turville-Heitz, Morgan, Sigler, Chris, Stromberg, Axel, Sun, Yan-Ting, Lourdudoss, Sebastian, Mawst, Luke J.
Format: Artikel
Sprache:eng
Schlagworte:
beam steering
Centroids
Continuous radiation
Infrared lasers
Licenses
Quantum cascade lasers
semiconductor growth
Tapering
Waveguides
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:We present a reverse-taper quantum cascade laser (QCL) emitting at 4.6 μm, a novel-geometry device that can scale the output power while maintaining good beam quality. Buried-ridge waveguides with tapered and straight regions were formed by ICP etching and HVPE regrowth - the tapered region scales the output power, while the emitting facet is located at the narrow-end taper section, which provides mode filtering by suppressing high-order spatial modes. Beam profiles were observed under quasi-continuous-wave (QCW)/CW operation and beam quality (M 2 ) measurements along with beam-stability measurements were performed - a small degree of collimated-beam centroid movement (
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2022.3163409