LITTLE KNOWN FACTS ABOUT ER:YB:YAB CRYSTAL.

The nonradiative changeover fees Keep to the formulation WNR = W (0) exp(-alphap), where p is the quantity of phonons matching the Electricity gap. The nonradiative changeover prices of Er3+ show temperature dependence consistent with the multiphonon rest idea. In Tm3+ the temperature dependence of nonradiative rest fees is challenging by the exist