High power quantum cascade lasers operating at room temperature

M. Razeghi*, S. Slivken

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


In this paper, some key design and technology issues for development of high power quantum cascade lasers are discussed. The scaling of power output with the number of emitting stages is shown. As part of this work, high power, 75-stage, λ = 9 μm lasers have been demonstrated with a peak power of 7 W at room temperature. This power is a direct result of high quality material growth and a low loss waveguide design. Similar results are demonstrated at a shorter wavelength (λ = 6.1 μm) utilizing a strain-balanced active region/injector design. For a 30-stage structure, 2 W peak power and 250 mW average power have been demonstrated at room temperature. Lastly, a timeline comparison of QCL laser performance is presented in terms of room temperature threshold current density and peak output power for various groups.

Original languageEnglish (US)
Pages (from-to)S637-S641
JournalJournal of the Korean Physical Society
Issue numberSPEC.
StatePublished - Feb 2003
EventProceedings of The 11th Seoul International Symposium on the Physics of Semiconductors and Apllications - 2002 - Cheju Island, Korea, Republic of
Duration: Aug 20 2002Aug 23 2002


  • Quantum cascade lasers

ASJC Scopus subject areas

  • General Physics and Astronomy


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