ER:YB:YAB CRYSTAL CAN BE FUN FOR ANYONE

The nonradiative transition rates follow the formulation WNR = W (0) exp(-alphap), in which p is the quantity of phonons matching the Strength gap. The nonradiative changeover premiums of Er3+ show temperature dependence in step with the multiphonon relaxation theory. In Tm3+ the temperature dependence of nonradiative leisure premiums is complicate