Mode switching and singlemode tuning in two-segment distributed feedback quantum cascade lasers

Mode switching and singlemode tuning in two-segment distributed feedback quantum cascade lasers

Two-segment distributed feedback (DFB) GaAs/AlGaAs, bound-to-continuum quantum cascade lasers emitting at ∼10.8 μm were fabricated and investigated. Reversible switching between two different DFB modes by current injection control yielding sidemode suppression ratios up to >23 dB is reported. Two...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Electronics letters 2006-02, Vol.42 (4), p.1-1
Hauptverfasser: Höfling, S, Seufert, J, Fischer, M, Rösener, B, Koeth, J, Reithmaier, J P, chel, A
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum gallium arsenides
Control systems
Control theory
Feedback
Gallium arsenide
Quantum cascade lasers
Switching
Tuning
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Two-segment distributed feedback (DFB) GaAs/AlGaAs, bound-to-continuum quantum cascade lasers emitting at ∼10.8 μm were fabricated and investigated. Reversible switching between two different DFB modes by current injection control yielding sidemode suppression ratios up to >23 dB is reported. Two different devices were fabricated, for which the distance between the different DFB modes is 1.5 and 2.5 cm^sup -1^, respectively, and quasi-continuous tuning over a range of >9 cm^sup -1^ (105 nm) between 120 K and 250 K was observed.
ISSN:0013-5194
1350-911X