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Lasing spectrum of QD LD with 7 QD stacks under cw mode at .
Lasing spectra of QD LD with 10 QD stacks under pulsed mode. The lasing wavelength shifts to shorter wavelength when the cavity length is short.
Lasing spectrum of QD LD with 5 QD stacks under cw mode at room temperature.
Lasing spectra of a QD LD with 15 QD stacks. The lasing occurs mostly through transition between ground states of electrons and holes in inhomogeneously broadened QDs.
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