The nonradiative changeover prices Keep to the formulation WNR = W (0) exp(-alphap), exactly where p is the volume of phonons matching the Power hole. The nonradiative changeover prices of Er3+ show temperature dependence according to the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative peace prices is https://er-yb-yab-crystal41638.glifeblog.com/32289662/er-yb-yab-crystal-an-overview