Interband cascade lasers with room temperature threshold current densities below 100 A/cm(2)

Robert Weih*, Martin Kamp, Sven Höfling

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Citations (Scopus)

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.

Original languageEnglish
Article number231123
Number of pages4
JournalApplied Physics Letters
Volume102
Issue number23
DOIs
Publication statusPublished - 10 Jun 2013

Keywords

  • Current density
  • Laser modes
  • Interband Cascade Lasers (ICLs)

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