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

M. Radziunas1, J. Fuhrmann1, A. Zeghuzi2, H.-J. Wünsche1,2, T. Koprucki1, C. Bree1, H. Wenzel2, U. Bandelow1

Published in:

Opt. Quant. Electron., vol. 51, no. 3, pp. 869 (2019).

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Abstract:

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.

1 Weierstrass Institute, Mohrenstr. 39, 10117 Berlin, Germany
2 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany

Keywords:

Broad area lasers, Modeling, Traveling wave, Current spreading, Heat transport, Iterative coupling, Different time scales, Finite volumes, Efficient implementation.