Abstract
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 language | English (US) |
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Pages (from-to) | S637-S641 |
Journal | Journal of the Korean Physical Society |
Volume | 42 |
Issue number | SPEC. |
State | Published - Feb 2003 |
Event | Proceedings of The 11th Seoul International Symposium on the Physics of Semiconductors and Apllications - 2002 - Cheju Island, Korea, Republic of Duration: Aug 20 2002 → Aug 23 2002 |
Keywords
- Quantum cascade lasers
ASJC Scopus subject areas
- General Physics and Astronomy