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Applied Physics B

, Volume 92, Issue 3, pp 305–311 | Cite as

Widely tunable mode-hop free external cavity quantum cascade lasers for high resolution spectroscopy and chemical sensing

  • G. WysockiEmail author
  • R. Lewicki
  • R.F. Curl
  • F.K. Tittel
  • L. Diehl
  • F. Capasso
  • M. Troccoli
  • G. Hofler
  • D. Bour
  • S. Corzine
  • R. Maulini
  • M. Giovannini
  • J. Faist
Article

Abstract

Recent progress in the development of room temperature, continuous wave, widely tunable, mode-hop-free mid-infrared external cavity quantum cascade laser (EC-QCL) spectroscopic sources is reported. A single mode tuning range of 155 cm-1 (∼ 8% of the center wavelength) with a maximum power of 11.1 mW and 182 cm-1 (∼ 15% of the center wavelength) with a maximum power of 50 mW was obtained for 5.3 and 8.4 μm EC-QCLs respectively. This technology is particularly suitable for high resolution spectroscopic applications, multi species trace-gas detection and spectroscopic measurements of broadband absorbers. Several examples of spectroscopic measurements performed using EC-QCL based spectrometers are demonstrated.

Keywords

Nitric Oxide Tuning Range Free Spectral Range Threshold Current Density Quartz Tuning Fork 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • G. Wysocki
    • 1
    Email author
  • R. Lewicki
    • 2
  • R.F. Curl
    • 2
  • F.K. Tittel
    • 2
  • L. Diehl
    • 3
  • F. Capasso
    • 3
  • M. Troccoli
    • 3
  • G. Hofler
    • 4
  • D. Bour
    • 4
  • S. Corzine
    • 4
  • R. Maulini
    • 5
  • M. Giovannini
    • 5
  • J. Faist
    • 5
    • 6
  1. 1.Electrical Engineering DepartmentPrinceton UniversityPrincetonUSA
  2. 2.Rice Quantum InstituteRice UniversityHoustonUSA
  3. 3.School of Engineering and Applied SciencesHarvard UniversityCambridgeUSA
  4. 4.Agilent LaboratoriesPalo AltoUSA
  5. 5.Institute of PhysicsUniversity of NeuchâtelNeuchâtelSwitzerland
  6. 6.ETH ZurichZurichSwitzerland

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