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Reverse-Taper Mid-I...
Reverse-Taper Mid-Infrared Quantum Cascade Lasers for Coherent Power Scaling
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- Ryu, Jae Ha (author)
- Univ Wisconsin Madison, Madison, WI 53706 USA.
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- Knipfer, Benjamin (author)
- Univ Wisconsin Madison, Madison, WI 53706 USA.
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- Kirch, Jeremy D. (author)
- Univ Wisconsin Madison, Madison, WI 53706 USA.
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- Marsland, Robert A. (author)
- Intraband LLC, Madison, WI 53726 USA.
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- Botez, Dan (author)
- Univ Wisconsin Madison, Madison, WI 53706 USA.
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- Earles, Tom (author)
- DRS Daylight Solut, Madison, WI 53704 USA.
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- Galstad, Chris (author)
- DRS Daylight Solut, Madison, WI 53704 USA.
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- Turville-Heitz, Morgan (author)
- Univ Wisconsin Madison, Madison, WI 53706 USA.
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- Sigler, Chris (author)
- Univ Wisconsin Madison, Madison, WI 53706 USA.
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- Strömberg, Axel (author)
- KTH,Fotonik
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- Sun, Yan-Ting (author)
- KTH,Fotonik
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- Lourdudoss, Sebastian, 1953- (author)
- KTH,Fotonik
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- Mawst, Luke J. (author)
- Univ Wisconsin Madison, Madison, WI 53706 USA.
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Univ Wisconsin Madison, Madison, WI 53706 USA Intraband LLC, Madison, WI 53726 USA. (creator_code:org_t)
- Institute of Electrical and Electronics Engineers (IEEE), 2022
- 2022
- English.
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In: IEEE Photonics Journal. - : Institute of Electrical and Electronics Engineers (IEEE). - 1943-0655. ; 14:3
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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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
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Licenses
- Quantum cascade lasers
- beam steering
- semiconductor growth
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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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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show more...
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Galstad, Chris
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Turville-Heitz, ...
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Sigler, Chris
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Strömberg, Axel
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Sun, Yan-Ting
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Lourdudoss, Seba ...
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Mawst, Luke J.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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IEEE Photonics J ...
- By the university
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Royal Institute of Technology