Zitouni, IkramBentouila, OmarAiadi, Kamal Eddine2019-05-262019-05-262018-12-10http://dspace.univ-eloued.dz/handle/123456789/1626International Symposium on Mechatronics and Renewable Energies El-Oued 10- 11 December 2018The aim of this work is the modeling of a thulium laser in glass. We proposed a simplified three-level model of thulium laser, and we solved numerically the temporal evolution of the population in function of puissance pump.We found that the threshold value is equal to 110mW. The results of this simplified model were acceptable within the approximations taken.enmodeling, thulium laser, doped glass, rare earth ions.Other