Watt level performance of quantum cascade lasers in room temperature continuous wave operation at λ∼3.76 μm

N. Bandyopadhyay*, Y. Bai, B. Gokden, A. Myzaferi, S. Tsao, Steven Boyd Slivken, Manijeh Razeghi

*Corresponding author for this work

Research output: Contribution to journalArticle

61 Scopus citations

Abstract

An InP-based quantum cascade laser heterostructure emitting at 3.76 μm is grown with gas-source molecular beam epitaxy. The laser core is composed of strain balanced In0.76 Ga0.24 As/ In0.26 Al0.74 As. Pulsed testing at room temperature exhibits a low threshold current density (1.5 kA/ cm2) and high wall plug efficiency (10%). Room temperature continuous wave operation gives 6% wall plug efficiency with a maximum output power of 1.1 W. Continuous wave operation persists up to 95 °C.

Original languageEnglish (US)
Article number131117
JournalApplied Physics Letters
Volume97
Issue number13
DOIs
StatePublished - Sep 27 2010

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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