Passive and hybrid mode locking in multi-section terahertz quantum cascade lasers

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dc.identifier.uri http://dx.doi.org/10.15488/3796
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/3830
dc.contributor.author Tzenov, P.
dc.contributor.author Babushkin, I.
dc.contributor.author Arkhipov, R.
dc.contributor.author Arkhipov, M.
dc.contributor.author Rosanov, N.
dc.contributor.author Morgner, Uwe
dc.contributor.author Jirauschek, C.
dc.date.accessioned 2018-10-10T09:10:13Z
dc.date.available 2018-10-10T09:10:13Z
dc.date.issued 2018
dc.identifier.citation Tzenov, P.; Babushkin, I.; Arkhipov, R.; Arkhipov, M.; Rosanov, N. et al.: Passive and hybrid mode locking in multi-section terahertz quantum cascade lasers. In: New Journal of Physics 20 (2018), Nr. 5, 53055. DOI: https://doi.org/10.1088/1367-2630/aac12a
dc.description.abstract It is believed that passive mode locking is virtually impossible in quantum cascade lasers (QCLs) because of too fast carrier relaxation time. Here, we revisit this possibility and theoretically show that stable mode locking and pulse durations in the few cycle regime at terahertz (THz) frequencies are possible in suitably engineered bound-to-continuum QCLs. We achieve this by utilizing a multi-section cavity geometry with alternating gain and absorber sections. The critical ingredients are the very strong coupling of the absorber to both field and environment as well as a fast absorber carrier recovery dynamics. Under these conditions, even if the gain relaxation time is several times faster than the cavity round trip time, generation of few-cycle pulses is feasible. We investigate three different approaches for ultrashort pulse generation via THz quantum cascade lasers, namely passive, hybrid and colliding pulse mode locking. eng
dc.language.iso eng
dc.publisher Bristol : Institute of Physics Publishing
dc.relation.ispartofseries New Journal of Physics 20 (2018), Nr. 5
dc.rights CC BY 3.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/3.0/
dc.subject hybrid mode locking eng
dc.subject passive mode locking eng
dc.subject quantum cascade lasers eng
dc.subject Mode-locked fiber lasers eng
dc.subject Quantum cascade lasers eng
dc.subject Relaxation time eng
dc.subject Carrier relaxation time eng
dc.subject Colliding pulse modelocking eng
dc.subject Hybrid mode-locking eng
dc.subject Quantum cascade lasers (QCLs) eng
dc.subject Terahertz frequencies eng
dc.subject Terahertz quantum-cascade lasers eng
dc.subject THz quantum cascade lasers eng
dc.subject Ultrashort pulse generation eng
dc.subject Passive mode locking eng
dc.subject.ddc 530 | Physik ger
dc.title Passive and hybrid mode locking in multi-section terahertz quantum cascade lasers
dc.type article
dc.type Text
dc.relation.issn 13672630
dc.relation.doi https://doi.org/10.1088/1367-2630/aac12a
dc.bibliographicCitation.issue 5
dc.bibliographicCitation.volume 20
dc.bibliographicCitation.firstPage 53055
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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