Rectangular Active Element

      "Rectangular Active Element" allows you to carry out the computations of a pumping processes for active elements of a rectagular form. As Initial Data You can input the following parameters:

  • pumping direction and the quantity of the pumping sources;
  • pumping power for all the pumping sources;
  • reflection of the pumping surface of the active element;
  • spectral width of pumping radiation;
  • activator concentration;
  • cross-section of the transition at the pumping wavelength;
  • spectral width of the active element absorption;
  • thermal conductivity;
  • thermal expansion coefficient;
  • Young's module;
  • Poisson's ratio;
  • thermo-optical parameters of active element;
  • length, width and thickness of active element;
  • types of the end-wall faces of active element;
  • number of reflection inside the active element;
  • angle between radiation incidence and the active element surface;
  • regime of cooling.


The subsection for Input of the Thermo-Optical Parameters

Fig. 1. The subsection for Input of the Thermo-Optical Parameters



The subsection for Input of the Pumping Parameters (energy and spectral)

Fig. 2. The subsection for Input of the Pumping Parameters (energy and spectral)



3D-Distribution of the Temperature on the cross-section of the active element

Fig. 3. 3D-Distribution of the Temperature on the cross-section of the active element



3D-Distribution of the stress component on the cross-section of the active element

Fig. 4. 3D-Distribution of the stress component on the cross-section of the active element


      The distributions for depolarization and length increasing are calculated for direct and zig-zag propagation inside of the active element.



Distribution of the Depolarization for direct propagation

Fig. 5. Distribution of the Depolarization for direct propagation



Distribution of the Depolarization for zig-zag propagation

Fig. 6. Distribution of the Depolarization for zig-zag propagation



3D-Distribution of the length increasing for zig-zag propagation

Fig. 7. 3D-Distribution of the length increasing for zig-zag propagation