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Low divergence single-mode surface emitting quantum cascade ring lasers
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10.1063/1.3000630
/content/aip/journal/apl/93/16/10.1063/1.3000630
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/16/10.1063/1.3000630
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Three-dimensional illustration of a surface emitting QC-ring laser. The inset shows a scanning electron microscopy image of a waveguide section holding the etched second-order DFB gratings to provide surface emission.

Image of FIG. 2.
FIG. 2.

Peak optical power and voltage vs current density characteristics at a temperature of . The inset shows a single-mode spectrum of the same device taken at a current density of .

Image of FIG. 3.
FIG. 3.

Surface emission single-mode spectra recorded at several temperatures. The inset illustrates the emission tuning with temperature where the solid line denotes a linear fit of the experimental data.

Image of FIG. 4.
FIG. 4.

(a) Two-dimensional surface emission far-field plot recorded at a current density of . The circular symmetry of the interference pattern is diminished by the cryostat window. (b) Corresponding far-field cross sections along device directions and .

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/content/aip/journal/apl/93/16/10.1063/1.3000630
2008-10-20
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Low divergence single-mode surface emitting quantum cascade ring lasers
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/16/10.1063/1.3000630
10.1063/1.3000630
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