Effect of self-phase modulation on the instabilities of quantum-cascade lasers

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Abstract

Theoretical analysis of lasing instability in quantum-cascade lasers was carried out. A mid-infrared quantum-cascade laser structure with triple resonance levels was chosen as the prototype of the lasing medium with high Kerr nonlinearity from optical transitions. The self-phase modulation effect induced by Kerr nonlinearity was found to possibly change the unstable frequency domain significantly, i.e., not only broaden the unstable domain but also drive it from single-mode to multi-mode. The instability mechanisms of quantum-cascade lasers include one like the coherent multi-mode Rishen-Nummedal-Graham-Haken instability and the spatial-hole-burning-induced single-mode instability.

Original languageEnglish (US)
Article number043519
JournalJournal of Nanophotonics
Volume4
Issue number1
DOIs
StatePublished - Dec 1 2010

Keywords

  • Kerr nonlinearity
  • instability
  • quantum-cascade lasers
  • self-phase modulation

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