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Tapered quantum cascade lasers

Authors: Lars Nähle; Julia Semmel; Wolfgang Kaiser; Sven Höfling; Alfred Forchel;

Tapered quantum cascade lasers

Abstract

The authors report on the fabrication of quantum cascade lasers with tapered gain sections. In order to obtain optimal results, index guided devices were realized with tapered angles varying between 0.9° and 2.6°. Compared to a common ridge waveguide laser (divergence of 48.7°), a very small horizontal beam divergence of 6.6° in the single lobe far field is achieved. The tapered quantum cascade lasers show good performance with peak output powers of more than 200mW at room temperature at an emission wavelength of ∼8.9μm.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
34
Top 10%
Top 10%
Top 10%
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