"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.

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





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





Fig. 3. 3D-Distribution of the Temperature 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.

Fig. 5. Distribution of the Depolarization for direct propagation





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





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