Interband cascade lasers with room temperature threshold current densities below 100 A/cm(2)
Abstract
Interband Cascade Lasers (ICLs) with threshold current densities below 100 A/cm(2) in pulsed operation at room temperature are presented. The laser structure comprises 10 active stages of 41 nm length, each stage containing a W-quantum well active region for emission in the spectral region around 3.6 mu m. A comparison of devices with 6 and 10 stages shows that the latter have a reduced threshold due to an increased optical confinement factor, very competitive threshold power densities of 428 W cm(-2) despite an increased threshold voltage and large differential slope efficiencies of 1390 mW/A. For a narrow ridge device, continuous wave operation is observed up to 65 degrees C.
Citation
Weih , R , Kamp , M & Höfling , S 2013 , ' Interband cascade lasers with room temperature threshold current densities below 100 A/cm(2) ' , Applied Physics Letters , vol. 102 , no. 23 , 231123 . https://doi.org/10.1063/1.4811133
Publication
Applied Physics Letters
Status
Peer reviewed
ISSN
0003-6951Type
Journal article
Collections
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