This paper shows the impact of the reversecross relaxation on pump efficiency over various of inversions in Tm-deopedglass. We have been able to define a set ofspectroscopic parameters for Tm-doped tellurite glasses able to predict thereverse process over a wide doping level interval. To achieve this, wecompleted the available parameter with the inverse cross-relaxation processconstant. In this paper, we proposed a method to assess the impact of thereverse cross-relaxation process on the pump performance for different inversions.
This method can be applied to any type of glass, and we demonstrate that whilea low inversion regime is optimum for lifetime, branching ratios, crosssections and cross-relaxation parameter calculations a second round ofmeasurement, using higher pump level, should be performed to preciselycharacterize the reverse cross-relaxation process. Within the aim of thispaper, we show that theappropriate calculation of reverse cross-relaxation parameter may have asignificant effect on the simulation of laser and amplifier devices.