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
Intrinsic stability of quantum cascade lasers against optical feedback / Mezzapesa, F. P.; Columbo, L. L.; Brambilla, Massimo; Dabbicco, M.; Borri, S.; Vitiello, M. S.; Beere, H. E.; Ritchie, D. A.; Scamarcio, G.. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 21:11(2013), pp. 13748-13757. [10.1364/OE.21.013748]
Intrinsic stability of quantum cascade lasers against optical feedback
BRAMBILLA, Massimo;
2013-01-01
Abstract
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| File | Dimensione | Formato | |
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