Numerical calculation of laser output power for various Hermite-Gaussian modes in a diode-pumped Nd : YAG laser with a modified reflective compound parabolic concentrator

For a side-pumped Nd:YAG laser using a reflective compound parabolic concen trator as an optical pump cavity, we numerically calculated the laser outpu t power based on the laser gain distributions for various Hermite-Gaussian modes. To obtain the gain distribution within each divided zone of the acti ve laser medium, we used a ray-tracing method to get the gain densities at the grid points and then interpolated the gain densities of the four grid p oints enclosing each zone. From the power distribution obtained through ray -tracing simulation, we calculated the laser output power using the laser o utput power calculation model. The calculated the laser output power was co mpared with that of our newly constructed laser. The calculated laser outpu t powers agreed well with the experimentally measured values.