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Electroluminescence spectra at temperatures from . The mesa was driven at with a pulse width of at a constant voltage of . The position of the lasing spectrum at room temperature is also shown. The inset illustrates the corresponding FWHM as a function of the temperature.
cw optical output power and voltage as a function of injection current at temperatures from for a high reflection coated, long, wide, buried heterostructure QCL mounted epilayer down on a diamond submount.
Threshold current as a function of heat sink temperature for both pulsed (5% duty cycle) and cw operation. Exponential fit gives the characteristic temperatures of 127 and for the cw and pulsed mode, respectively.
cw optical output power and voltage as a function of injection current at cryogenic temperatures from .
cw WPE as a function of injection current at temperatures from .
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