We study the instability thresholds of the stationary emission of a quantum cascade laser with optical feedback described by the Lang Kobayashi model. We introduce an exact linear stability analysis and an approximated one for an unipolar lasers, who does not exhibit relaxation oscillations, and investigate the regimes of the emitter beyond the continuous wave instability threshold, depending on the number and density of the external cavity modes. We then show that a unipolar laser with feedback can exhibit coherent multimode oscillations that indicate spontaneous phase-locking
Multimode regimes in quantum cascade lasers with optical feedback / Columbo, Ll; Brambilla, Massimo. - In: OPTICS EXPRESS. - ISSN 1094-4087. - 22:9(2014), pp. 10105-10118. [10.1364/OE.22.010105]
Multimode regimes in quantum cascade lasers with optical feedback
BRAMBILLA, Massimo
2014-01-01
Abstract
We study the instability thresholds of the stationary emission of a quantum cascade laser with optical feedback described by the Lang Kobayashi model. We introduce an exact linear stability analysis and an approximated one for an unipolar lasers, who does not exhibit relaxation oscillations, and investigate the regimes of the emitter beyond the continuous wave instability threshold, depending on the number and density of the external cavity modes. We then show that a unipolar laser with feedback can exhibit coherent multimode oscillations that indicate spontaneous phase-lockingFile | Dimensione | Formato | |
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