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  • Ryu, Jae HaUniv Wisconsin Madison, Madison, WI 53706 USA. (author)

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

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • Institute of Electrical and Electronics Engineers (IEEE),2022
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-311906
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-311906URI
  • https://doi.org/10.1109/JPHOT.2022.3163409DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20220506
  • We present a reverse-taper quantum cascade laser (QCL) emitting at 4.6 mu m, 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 (<0.46 mrad, peak-to-peak) was observed, along with M-2 values close to 1 up to similar to 1 W QCW power. Devices of shorter cavity lengths were also investigated, indicating that the output power scales with the core-region volume but results in a small increase in angular deviation.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Knipfer, BenjaminUniv Wisconsin Madison, Madison, WI 53706 USA. (author)
  • Kirch, Jeremy D.Univ Wisconsin Madison, Madison, WI 53706 USA. (author)
  • Marsland, Robert A.Intraband LLC, Madison, WI 53726 USA. (author)
  • Botez, DanUniv Wisconsin Madison, Madison, WI 53706 USA. (author)
  • Earles, TomDRS Daylight Solut, Madison, WI 53704 USA. (author)
  • Galstad, ChrisDRS Daylight Solut, Madison, WI 53704 USA. (author)
  • Turville-Heitz, MorganUniv Wisconsin Madison, Madison, WI 53706 USA. (author)
  • Sigler, ChrisUniv Wisconsin Madison, Madison, WI 53706 USA. (author)
  • Strömberg, AxelKTH,Fotonik(Swepub:kth)u16koivb (author)
  • Sun, Yan-TingKTH,Fotonik(Swepub:kth)u126yqo4 (author)
  • Lourdudoss, Sebastian,1953-KTH,Fotonik(Swepub:kth)u16044fg (author)
  • Mawst, Luke J.Univ Wisconsin Madison, Madison, WI 53706 USA. (author)
  • Univ Wisconsin Madison, Madison, WI 53706 USA.Intraband LLC, Madison, WI 53726 USA. (creator_code:org_t)

Related titles

  • In:IEEE Photonics Journal: Institute of Electrical and Electronics Engineers (IEEE)14:31943-0655

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