Continuous Wave Quantum Cascade Lasers With Reduced Number Of Stages

Keywords

high power; mid-infrared; Quantum cascade laser (QCL)

Abstract

Experimental data for 15-stage 5.6-μm quantum cascade lasers based on Al0.78In0.22As/In0.69Ga0.31As active region composition are presented. Pulsed slope efficiency, threshold current density, and wall-plug efficiency for a $2.1~\text {mm} \times 10.4~\mu \text{m}$ device with a high reflection-coated back facet were measured to be 1.45 W/A, 3.1 kA/cm2, and 18%, respectively. Corresponding continuous wave values for the same parameters were measured to be 1.42 W/A, 3.7 kA/cm2, and 12%. Demonstrated continuous wave optical power level exceeding 0.5 W per millimeter of cavity length makes quantum cascade lasers with reduced number of stages suitable for high power infrared applications.

Publication Date

8-15-2017

Publication Title

IEEE Photonics Technology Letters

Volume

29

Issue

16

Number of Pages

1328-1331

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/LPT.2017.2722039

Socpus ID

85021915844 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85021915844

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