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Schematic cross section of a PbSe based VECSEL with resonant design.
Light-in/light-out characteristics at three different temperatures. From the incident pump power, only about 20% contribute to the excitation.
Normalized lasing spectra at different heat-sink temperatures.
Threshold pump power vs heat-sink temperature.
Calculated electric field intensity for a resonant design with center wavelength ( normalized to one). The half-width of the resonance curve is . Due to the temperature dependence of the band gap of PbSe, this translates to range of operating temperature in agreement with Fig. 4.
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