Single-Mode Tunable Quantum Cascade Lasers in the Spectral Range of the CO2 Laser at λ = 9.5-10.5 μm

Rüdeger Köhler, Claire Gmachl, Federico Capasso, Alessandro Tredicucci, Deborah L. Sivco, Alfred Y. Cho

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Widely tunable, single-mode quantum cascade distributed feedback (QC-DFB) lasers based on a complex coupling scheme and operating in the wavelength range of the CO2 laser (λ ≈ 9.5-10.5 μm) are reported. Dynamic single-mode emission up to high current levels is obtained. The continuous single-mode tuning range is 150 nm, while the tuning range of the equivalent Fabry-Perot laser is ∼400 nm. By homogeneously reducing all layer thicknesses by 10%, the wavelength coverage of a single QC-laser design can be extended to cover one entire regular band of the fundamental CO2 laser spectrum.

Original languageEnglish (US)
Pages (from-to)474-476
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number5
StatePublished - May 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


  • Distributed feedback lasers
  • Mid-infrared
  • Single-mode lasers
  • Tunable lasers
  • Unipolar semiconductor laser


Dive into the research topics of 'Single-Mode Tunable Quantum Cascade Lasers in the Spectral Range of the CO<sub>2</sub> Laser at λ = 9.5-10.5 μm'. Together they form a unique fingerprint.

Cite this