Applied Physics B

, Volume 92, Issue 3, pp 305–311

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

  • G. Wysocki
  • 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

DOI: 10.1007/s00340-008-3047-x

Cite this article as:
Wysocki, G., Lewicki, R., Curl, R. et al. Appl. Phys. B (2008) 92: 305. doi:10.1007/s00340-008-3047-x

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.

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • G. Wysocki
    • 1
  • 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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