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Quantum Cascade Lasers for the Mid-infrared Spectral Range: Devices and Applications

  • Ch. MannEmail author
  • Q. K. Yang
  • F. Fuchs
  • W. Bronner
  • R. Kiefer
  • K. Köhler
  • H. Schneider
  • R. Kormann
  • H. Fischer
  • T. Gensty
  • W. Elsäßer
Chapter
Part of the Advances in Solid State Physics book series (ASSP, volume 43)

Abstract

Quantum cascade lasers emitting at λ∼5 µm based on different active region designs are investigated. Using lattice-matched GaInAs/AlInAs on InP substrates the maximum peak optical power as well as the maximum pulsed-mode operating temperature is enhanced by incorporating AlAs blocking barriers together with strain-compensating InAs layers into the active regions. Further improvement is achieved by employing strain-compensated GaInAs/AlInAs quantum wells for which maximum pulsed-mode operating temperatures in excess of 350 K are observed. High-reflectivity coated devices mounted substrate-side down show a maximum continuous-wave operating temperature of 194 K. Also the normalized relative intensity noise is investigated. Finally, a comparison trace-gas sensing experiment employing one of the present quantum cascade lasers and a lead-chalcogenide laser is presented. Detecting the P(25) absorption line of CO, higher stability is obtained using a quantum cascade laser.

Keywords

Optical Power Injection Current Laser Transition Quantum Cascade Laser Threshold Current Density 
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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Authors and Affiliations

  • Ch. Mann
    • 1
    Email author
  • Q. K. Yang
    • 1
  • F. Fuchs
    • 1
  • W. Bronner
    • 1
  • R. Kiefer
    • 1
  • K. Köhler
    • 1
  • H. Schneider
    • 1
  • R. Kormann
    • 2
  • H. Fischer
    • 2
  • T. Gensty
    • 3
  • W. Elsäßer
    • 3
  1. 1.Fraunhofer-Institute for Applied Solid State Physics (IAF)FreiburgGermany
  2. 2.Max-Planck-Institute for ChemistryMainzGermany
  3. 3.Institute of Applied PhysicsDarmstadt University of TechnologyDarmstadtGermany

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