LITTLE KNOWN FACTS ABOUT ER:YB:YAB CRYSTAL.

The nonradiative transition prices Keep to the formulation WNR = W (0) exp(-alphap), where p is the quantity of phonons matching the Vitality hole. The nonradiative transition costs of Er3+ show temperature dependence in keeping with the multiphonon relaxation principle. In Tm3+ the temperature dependence of nonradiative peace charges is difficult