In this work, we demonstrate the generation of 630 fs, 4.5 W pulses from a mid-infrared quantum cascade laser by gain modulation induced spectral broadening and external pulse compression. Such sources open new pathways for broadband supercontinuum generation in the mid-infrared.
We report on the formation of near-transform-limited sub-picosecond pulses from a mid-infrared quantum cascade laser with several Watts of peak power. Starting from a frequency-modulated phase-locked state, which most efficiently exploits the gain from the active region, ultrashort high peak power pulses are generated via external pulse compression. The temporal nature of these pulses is assessed by means of coherent beatnote interferometry, optical sampling and an interferometric autocorrelation technique.
In this work, we demonstrate the generation of 630 fs, 4.5 W pulses from a mid-infrared quantum cascade laser by gain modulation induced spectral broadening and external pulse compression. Such sources open new pathways for broadband supercontinuum generation in the mid-infrared.
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