Room temperature quantum cascade laser with ∼31% wall-plug efficiency

In this article, we report the demonstration of a quantum cascade laser emitting at λ ≈ 4.9 μm with a wall-plug efficiency of ∼31% and an output power of ∼23 W in pulsed operation at room temperature with 50 cascade stages (Ns). With proper fabrication and packaging, this buried ridge quantum cascad...

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Bibliographic Details
Published inAIP advances Vol. 10; no. 7; pp. 075012 - 075012-4
Main Authors Wang, F., Slivken, S., Wu, D. H., Razeghi, M.
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.07.2020
AIP Publishing LLC
Subjects
Efficiency
Lasers
Numerical prediction
Quantum cascade lasers
Room temperature
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Summary:In this article, we report the demonstration of a quantum cascade laser emitting at λ ≈ 4.9 μm with a wall-plug efficiency of ∼31% and an output power of ∼23 W in pulsed operation at room temperature with 50 cascade stages (Ns). With proper fabrication and packaging, this buried ridge quantum cascade laser with a cavity length of 5 mm delivers more than ∼15 W output power, and its wall-plug efficiency exceeds ∼20% at 100 °C. The experimental results of the lasers are well in agreement with the numerical predictions.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0012925