High peak power (34 W) photonic crystal distributed feedback quantum cascade lasers
2011
We demonstrate room temperature, high power, single mode and diffraction limited operation of a two dimensional
photonic crystal distributed feedback (PCDFB) quantum cascade laser emitting at 4.36 μm. Total peak power up to 34 W
is observed from a 3 mm long laser with 400 μm cavity width at room temperature. Far-field profiles have M 2 figure of
merit as low as 2.5. This device represents a significant step towards realization of spatially and spectrally pure broad
area high power quantum cascade lasers.
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