WIAS Preprint No. 2558, (2018)

Efficient coupling of electro-optical and heat-transport models for broad-area semiconductor lasers


  • Radziunas, Mindaugas
  • Fuhrmann, Jürgen
    ORCID: 0000-0003-4432-2434
  • Zeghuzi, Anissa
  • Wünsche, Hans-Jürgen
  • Koprucki, Thomas
    ORCID: 0000-0001-6235-9412
  • Brée, Carsten
  • Wenzel, Hans
  • Bandelow, Uwe
    ORCID: 0000-0003-3677-2347

2010 Mathematics Subject Classification

  • 65Z05 78A60 80A20, 78M12, 78M34, 65N08

2008 Physics and Astronomy Classification Scheme

  • 42.55.Px 44.05.+e 02.30.Jr 02.60.Lj 02.70.Dh


  • Broad area lasers, modeling, traveling wave, current spreading, heat transport, iterative coupling, different time scales, finite volumes, efficient implementation




In this work, we discuss the modeling of edge-emitting high-power broad-area semiconductor lasers. We demonstrate an efficient iterative coupling of a slow heat transport (HT) model defined on multiple vertical-lateral laser cross-sections with a fast dynamic electro-optical (EO) model determined on the longitudinal-lateral domain that is a projection of the device to the active region of the laser. Whereas the HT-solver calculates temperature and thermally-induced refractive index changes, the EO-solver exploits these distributions and provides time-averaged field intensities, quasi-Fermi potentials, and carrier densities. All these time-averaged distributions are used repetitively by the HT-solver for the generation of the heat sources entering the HT problem solved in the next iteration step.

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