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Single-mode quantum cascade lasers based on a folded Fabry-Perot cavity
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10.1063/1.3554757
/content/aip/journal/apl/98/6/10.1063/1.3554757
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/6/10.1063/1.3554757
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic of the folded FP cavity. (b) SEM image of part of a folded FP cavity QC laser.

Image of FIG. 2.
FIG. 2.

Laser spectrum of a folded FP cavity QC laser with half-ring diameter of and straight ridge length of 1.18 mm operated at 80 K in pulsed mode at 120% threshold current. Single-mode emission with a SMSR of 27 dB is achieved. The inset shows the spectrum of another laser (straight ridge length 1.06 mm and half-ring diameter ) that has four dominant modes at 160% threshold current.

Image of FIG. 3.
FIG. 3.

Laser spectra of five folded FP cavity lasers with the same half-ring diameter but different straight ridge lengths varying from to as indicated operated in pulsed mode at 80 K close to the threshold current.

Image of FIG. 4.
FIG. 4.

(a) Spectra of a folded FP cavity QC laser with half-ring diameter and 1.14 mm straight ridge length operated in pulsed mode close to threshold and at varying heat sink temperatures. (b) Plot of the emission wavelength (single mode or double mode) vs operating temperature from 80 to 237 K. The single-mode tuning is continuous over parts of the temperature range. The inset shows the pulsed LIV characteristics at various temperatures.

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/content/aip/journal/apl/98/6/10.1063/1.3554757
2011-02-11
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Single-mode quantum cascade lasers based on a folded Fabry-Perot cavity
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/6/10.1063/1.3554757
10.1063/1.3554757
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