We study the dynamics of a Quantum Cascade Laser subject to strong optical feedback in the framework of the Lang-Kobayashi model. In particular, we demonstrate that the continuous wave instability may lead to coherent multimode oscillations that indicate spontaneous phase-locking among external cavity modes. We recently predicted that this unique behavior is linked to the absence of relaxation oscillations in unipolar semiconductor lasers, which are characterized by a fast carriers recombination time (class-A lasers). These theoretical evidences may help understanding the mechanisms possibly leading to spontaneous mode-locking and pulse generation in QCLs.

Quantum cascade lasers with optical feedback: Regular multimode dynamics / Columbo, Ll.; Brambilla, M.; Mezzapesa, Fp.; Dabbicco, M.; Scamarcio, G.. - STAMPA. - 9370:(2015). (Intervento presentato al convegno Quantum Sensing and Nanophotonic Devices XII tenutosi a San Francisco, CA nel 8.12 Febbraio 2015) [10.1117/12.2084520].

Quantum cascade lasers with optical feedback: Regular multimode dynamics

Brambilla, M.;Dabbicco, M.;
2015-01-01

Abstract

We study the dynamics of a Quantum Cascade Laser subject to strong optical feedback in the framework of the Lang-Kobayashi model. In particular, we demonstrate that the continuous wave instability may lead to coherent multimode oscillations that indicate spontaneous phase-locking among external cavity modes. We recently predicted that this unique behavior is linked to the absence of relaxation oscillations in unipolar semiconductor lasers, which are characterized by a fast carriers recombination time (class-A lasers). These theoretical evidences may help understanding the mechanisms possibly leading to spontaneous mode-locking and pulse generation in QCLs.
2015
Quantum Sensing and Nanophotonic Devices XII
978-162841460-8
Quantum cascade lasers with optical feedback: Regular multimode dynamics / Columbo, Ll.; Brambilla, M.; Mezzapesa, Fp.; Dabbicco, M.; Scamarcio, G.. - STAMPA. - 9370:(2015). (Intervento presentato al convegno Quantum Sensing and Nanophotonic Devices XII tenutosi a San Francisco, CA nel 8.12 Febbraio 2015) [10.1117/12.2084520].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/123412
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