Journal
OPTICS EXPRESS
Volume 21, Issue 11, Pages 13748-13757Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.013748
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Funding
- MIUR [PON01-2238, PON02-0576]
- INNOVHEAD
- MASSIME
- National Firb Project PHOCOS [RBFR08E7VA]
- Italian Ministry of Education, University, and Research (MIUR) [RBFR10LULP]
- Engineering and Physical Sciences Research Council [EP/J017671/1] Funding Source: researchfish
- EPSRC [EP/J017671/1] Funding Source: UKRI
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We study the time dependence of the optical power emitted by terahertz and mid-IR quantum cascade lasers in presence of optical reinjection and demonstrate unprecedented continuous wave (CW) emission stability for strong feedback. We show that the absence of coherence collapse or other CW instabilities typical of diode lasers is inherently associated with the high value of the photon to carrier lifetime ratio and the negligible linewidth enhancement factor of quantum cascade lasers. (C) 2013 Optical Society of America
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