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

S Hofling*, J Seufert, M Fischer, B Rosener, J Koeth, JP Reithmaier, A Forchel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Two-segment distributed feedback (DFB) GaAs/AlGaAs bound-to-continuum quantum cascade laser,; emitting at similar to 10.8 mu m 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(-1), respectively, and quasi-continuous tuning over a range of > 9 cm(-1) (105 nm) between 120 and 250 K was observed.

Original languageEnglish
Pages (from-to)220-222
Number of pages3
JournalElectronics Letters
Volume42
Issue number4
DOIs
Publication statusPublished - 16 Feb 2006

Keywords

  • BOUND-TO-CONTINUUM
  • TEMPERATURE OPERATION

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