Non-radiative transitions between the sublevels of the working lower multiplet of the YAG:Nd laser: Effects on the generation spectrum

The article presents the stationary solution of the Tang–Statz–DeMars system of equations describing the generation spectrum of a YAG:Nd laser at a wavelength of 1064.2 nm taking into account the seven 4F3/2 → 4I11/2 transition gain lines. The effect that line broadening has on the generation spectrum due to a temperature increase has been calculated. The effect of population distribution over the 4I11/2 multiplet sublevels on the generation spectrum was also calculated. The generation spectrum shifting to the region of 1066 nm with a temperature increase was found to result from variations in the population of the 4I11/2 multiplet sublevels.