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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


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.

Original languageEnglish (US)
Article number075012
JournalAIP Advances
Issue number7
StatePublished - Jul 1 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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