Beam stability of buried-heterostructure quantum cascade lasers employing HVPE regrowth
Abstract
Measurements of beam stability for mid-infrared (IR)-emitting quantum cascade lasers (QCLs) are important for applications that require the beam to travel through air to remote targets, such as free-space communication links. We report beam-quality measurement results of narrow-ridge, 4.6 µm-emitting buried-heterostructure (BH) QCLs fabricated using ICP etching and HVPE regrowth. Beam-quality measurements under QCW operation exhibit M2 < 1.2 up to 1 W for ∼5 µm-wide ridges. 5 µm-wide devices display some small degree of centroid motion with increasing output power (< 0.125 mrad), which corresponds to a targeting error of ∼1.25 cm over a distance of 100 m.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 15, 2021
- Source ID
- 10.1364/oe.414489
Entities
People
- Axel Stromberg
- B. Knipfer
- D. Botez
- Giriprasanth Omanakuttan
- Jae Ha Ryu
- Jeremy D. Kirch
- L. J. Mawst
- Morgan Turville-Heitz
- Robert A. Marsland
- Sebastian Lourdudoss
- Tom Earles
- Yan‐Ting Sun
- Zerui Liu
Organizations
- Air Force Office of Scientific Research
- Horizon 2020
- Swedish Research Council