Mezzapesa F P, Columbo L L, Brambilla M, Dabbicco M, Borri S, Vitiello M S, Beere H E, Ritchie D A, Scamarcio G
CNR-IFN UOS Bari, Bari, Italy.
Opt Express. 2013 Jun 3;21(11):13748-57. doi: 10.1364/OE.21.013748.
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.
我们研究了太赫兹和中红外量子级联激光器在光注入情况下发射光功率的时间依赖性，并证明了在强反馈下前所未有的连续波（CW）发射稳定性。我们表明，量子级联激光器不存在二极管激光器典型的相干崩溃或其他连续波不稳定性，这与光子与载流子寿命比的高值以及线宽增强因子可忽略不计本质上相关。
