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

F. Wang; S. Slivken; D. H. Wu; M. Razeghi

doi:10.1063/5.0012925

AIP Advances (Jul 2020)

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

F. Wang,
S. Slivken,
D. H. Wu,
M. Razeghi

Affiliations

F. Wang: Center for Quantum Devices, Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, USA
S. Slivken: Center for Quantum Devices, Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, USA
D. H. Wu: Center for Quantum Devices, Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, USA
M. Razeghi: Center for Quantum Devices, Department of Electrical and Computer Engineering, Northwestern University, Evanston, Illinois 60208, USA

DOI: https://doi.org/10.1063/5.0012925
Journal volume & issue: Vol. 10, no. 7
pp. 075012 – 075012-4

Abstract

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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.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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