Widely tunable single-mode quantum cascade lasers with two monolithically coupled Fabry-Perot cavities

Sven Höfling, J. Heinrich, J. P. Reithmaier, A. Forchel, J. Seufert, M. Fischer, J. Koeth

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The authors report on tunable, miniaturized, two-segment coupled cavity quantum cascade lasers fabricated in a process with a single dry etch step. They observed controllable vernier-effect-based mode switching, induced by the spectral shift of the short cavity's Fabry-Perot mode comb due to Joule heating. With the help of this discontinuous tuning mechanism, single-mode operation with routinely similar to 20 dB side mode suppression ratio was achieved over a broad spectral range. The authors measured a quasicontinuous tuning range of 12 cm(-1) (138 nm) and an entire single-mode tuning range of 16.5 cm(-1) (190 nm), centered around 933 cm(-1) (10.7 mu m). (c) 2006 American Institute of Physics.

Original languageEnglish
Article number241126
Number of pages3
JournalApplied Physics Letters
Volume89
Issue number24
DOIs
Publication statusPublished - 11 Dec 2006

Keywords

  • CONTINUOUS-WAVE OPERATION
  • DISTRIBUTED-FEEDBACK
  • SEMICONDUCTOR-LASER
  • SUPERLATTICE

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