St. Petersburg Polytechnic University Journal: Physics and Mathematics Научно-технические ведомости СПбГПУ. Физико-математические науки 2304-9782, 2618-8686, 2405-7223 7 The rate consideration of relaxation transitions between sublevels of a multiplet in the generation spectrum of YAG:Nd-laser Учет скорости релаксационных переходов между подуровнями мультиплета в спектре генерации YAG:Nd-лазера Golovkov Oleg Stepanov Vladimir vl.stepanov@365.rsu.edu.ru Kuptsova Galina Ryazan State University named for S.A.Yesenin 10 03 2014 1 189 55 60

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 4F3/2 multiplet and a specific rate of cross-relaxation transitions between those sublevels. The results obtained are compared with experimental data.

 YAG: Nd-laser Boltzmann distribution generation spectrum Tang-Statz-Demars system ofequations multiplet sublevels