The nonradiative changeover charges follow the method WNR = W (0) exp(-alphap), where p is the quantity of phonons matching the energy gap. The nonradiative changeover costs of Er3+ show temperature dependence in step with the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative relaxation premiums is difficult https://erybyabcrystal17384.dgbloggers.com/33604834/the-2-minute-rule-for-er-yb-yab-crystal