Abstract:
The two alternative forms of the Tang – Statz – DeMars system of equations are presented in the paper. The spectra of the multimode generation of YAG:Nd$^{+3}$-laser are calculated assuming the Boltzmann distribution over the sublevels of the $^{4}{F}_{3/2}$ multiplet and a specific rate of cross-relaxation transitions between those sublevels. The results obtained are compared with experimental data.