Cylidrical Active Element

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

  • quantity of the pumping sources;
  • pumping power for all the pumping sources;
  • reflection of the pumping reflectors;
  • spectral width of pumping radiation;
  • divergence of a pumping sources;
  • 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;
  • diameter and length of active element;
  • diameter and thickness of reflector;
  • distance to the pumping sources;
  • regime of cooling.


The computations can be executed for different quantity of the pumping sources

Fig. 1. The computations can be executed for different quantity of the pumping sources



Subsection of computation of the volumetric power of heat-release in the active element

Fig. 2. Subsection of computation of the volumetric power of heat-release in the active element



One source pumping without immersion medium optimization

Fig. 3. One source pumping without immersion medium optimization



One source pumping with immersion medium optimization

Fig. 4. One source pumping with immersion medium optimization



"Hot points" in inversion distribution for non-optimal pumping by five sources

Fig. 5. "Hot points" in inversion distribution for non-optimal pumping by five sources



Result of complete optimization for inversion population distribution

Fig. 6. Result of complete optimization for inversion population distribution



The temperature field in high concentration active element for two pumping sources

Fig. 7. The temperature field in high concentration active element for two pumping sources



The temperature field for non-optimal configuration of laser head with four pumping sources

Fig. 8. The temperature field for non-optimal configuration of laser head with four pumping sources