Search: id:"swepub:oai:DiVA.org:kth-311906" >
Reverse-Taper Mid-I...
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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 ...
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Institute of Electrical and Electronics Engineers (IEEE),2022
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Numbers
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LIBRIS-ID:oai:DiVA.org:kth-311906
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-311906URI
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https://doi.org/10.1109/JPHOT.2022.3163409DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20220506
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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 ...)
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Knipfer, BenjaminUniv Wisconsin Madison, Madison, WI 53706 USA.
(author)
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Kirch, Jeremy D.Univ Wisconsin Madison, Madison, WI 53706 USA.
(author)
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Marsland, Robert A.Intraband LLC, Madison, WI 53726 USA.
(author)
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Botez, DanUniv Wisconsin Madison, Madison, WI 53706 USA.
(author)
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Earles, TomDRS Daylight Solut, Madison, WI 53704 USA.
(author)
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Galstad, ChrisDRS Daylight Solut, Madison, WI 53704 USA.
(author)
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Turville-Heitz, MorganUniv Wisconsin Madison, Madison, WI 53706 USA.
(author)
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Sigler, ChrisUniv Wisconsin Madison, Madison, WI 53706 USA.
(author)
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Strömberg, AxelKTH,Fotonik(Swepub:kth)u16koivb
(author)
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Sun, Yan-TingKTH,Fotonik(Swepub:kth)u126yqo4
(author)
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Lourdudoss, Sebastian,1953-KTH,Fotonik(Swepub:kth)u16044fg
(author)
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Mawst, Luke J.Univ Wisconsin Madison, Madison, WI 53706 USA.
(author)
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Univ Wisconsin Madison, Madison, WI 53706 USA.Intraband LLC, Madison, WI 53726 USA.
(creator_code:org_t)
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In:IEEE Photonics Journal: Institute of Electrical and Electronics Engineers (IEEE)14:31943-0655
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Ryu, Jae Ha
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Knipfer, Benjami ...
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Kirch, Jeremy D.
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Marsland, Robert ...
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Botez, Dan
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Earles, Tom
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Galstad, Chris
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Strömberg, Axel
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Mawst, Luke J.
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