5.6 Μ M Quantum Cascade Lasers Based On A Two-Material Active Region Composition With A Room Temperature Wall-Plug Efficiency Exceeding 28%

Abstract

5.6 μm quantum cascade lasers based on the Al0.78In0.22As/In0.69Ga0.31As active region composition with the measured pulsed room temperature wall plug efficiency of 28.3% are reported. Injection efficiency for the upper laser level of 75% was measured for the design by testing devices with variable cavity lengths. A threshold current density of 1.7 kA/cm2 and a slope efficiency of 4.9 W/A were measured for uncoated 3.15 mm × 9 μm lasers. Threshold current density and slope efficiency dependence on temperature in the range from 288 K to 348 K for the structure can be described by characteristic temperatures T0 ∼ 140 K and T1 ∼ 710 K, respectively.

Publication Date

9-19-2016

Publication Title

Applied Physics Letters

Volume

109

Issue

12

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1063/1.4963233

Socpus ID

84988649037 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84988649037

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