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High-power, continuous-wave operation of distributed-feedback quantum-cascade lasers at
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10.1063/1.2408639
/content/aip/journal/apl/89/25/10.1063/1.2408639
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/25/10.1063/1.2408639
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Output power vs current of a HR coated -long and -wide DFB laser at different heat sink temperatures between 15 and along with curves at 15 and . The inset shows room temperature single mode emission spectra at various cw injection currents. The spectra are obtained at injection current of in step of .

Image of FIG. 2.
FIG. 2.

Single mode cw emission spectra of a DFB laser at for different heat sink temperatures of in steps of . The inset shows the linear tuning characteristics of the wavelength with temperature for the same device.

Image of FIG. 3.
FIG. 3.

Threshold current density as a function of heat sink temperature in cw and pulsed modes of a HR coated -long and -wide DFB laser. The solid line is the result of the fit from a usual exponential function, . In pulse mode, is with for temperature range of .

Image of FIG. 4.
FIG. 4.

Subthreshold cw emission spectra at with injection currents of 0.87 and . The two curves are separated with an offset for clarity.

Image of FIG. 5.
FIG. 5.

Normalized slow axis far-field profiles of a DFB laser at for different duty cycles of 10%–50% in step of 10%. The inset shows room temperature cw far-field profile for the same DFB at a injection currents of 1 and .

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/content/aip/journal/apl/89/25/10.1063/1.2408639
2006-12-21
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High-power, continuous-wave operation of distributed-feedback quantum-cascade lasers at λ∼7.8μm
http://aip.metastore.ingenta.com/content/aip/journal/apl/89/25/10.1063/1.2408639
10.1063/1.2408639
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