LITTLE KNOWN FACTS ABOUT ER:YB:YAB CRYSTAL.

The nonradiative transition fees follow the formulation WNR = W (0) exp(-alphap), where by p is the number of phonons matching the Vitality gap. The nonradiative transition costs of Er3+ exhibit temperature dependence in keeping with the multiphonon leisure principle. In Tm3+ the temperature dependence of nonradiative leisure premiums is complicate