Nikola N. Vuković

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We show that low-threshold Risken–Nummedal–Graham–Haken (RNGH) instabilities in quantum cascade lasers (QCLs) occur due to a combined effect of the carrier coherence and population grating induced in the gain medium. QCLs with a few mm long cavity exhibit intermittent RNGH self-pulsations while regular self-pulsations are possible in(More)
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