Dynamical thermal properties of stripe-geometry laser diodes

The dynamical thermal properties of stripe-geometry double-heterostructure GaAs¿(AlGa)As laser diodes have been analysed in this paper. For short current pulses (t ¿ 0.5 ¿s) the nonhomogeneous GaAs-(AlGa)As structure of the laser diode is reduced to the thermally equivalent homogeneous (AlGa)As structure. The dynamical thermal conduction equation is solved for this case. With the exception of active layer heating due to nonradiative recombination and partial reabsorption of radiation, the radiative transfer of the spontaneous radiation through the wide-gap passive layers, the Joule heating and the current-spreading effect are taken into account.In the resultant formulas, the temperature profiles are a function of only the construction parameters, the supplied power and the quantum efficiencies.