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Bound-to-continuum and two-phonon resonance, quantum-cascade lasers for high duty cycle, high-temperature operation
Auteur(s)
Faist, Jérôme
Beck, Mattias
Aellen, Thierry
Rochat, Michel
Blaser, Stéphane
Date de parution
2002
In
Journal of Quantum Electronics (IEEE), Institute of Electrical and Electronics Engineers (IEEE), 2002/38/6/533-546
Résumé
Recent advances in quantum-cascade (QC) laser active-region design are reviewed. Based on a rate equation model of the active region, we show why new gain regions. based on a two-phonon resonance or a bound-to-continuum transition exhibit significantly better performance than the traditional design based on a three-quantum-well active region. Threshold current densities as low as 3 kA/cm<sup>2</sup> at <i>T</i> = 300 K, operation with a peak power of 90 mW at 425 K, single-mode high-power operation up to temperatures above 330 K at λ ≈ 16 <i>μ</i>m and continuous wave operation up to <i>T</i> = 311 K are demonstrated. QC lasers able to operate at high duty cycles (50%) on a Peltier cooler were used in a demonstration of a 300-MHz free-space optical link between two buildings separated by 350 m.
Identifiants
Type de publication
journal article
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