LITTLE KNOWN FACTS ABOUT ER:YB:YAB CRYSTAL.

The nonradiative changeover costs follow the method WNR = W (0) exp(-alphap), where by p is the volume of phonons matching the Power gap. The nonradiative transition rates of Er3+ show temperature dependence per the multiphonon rest idea. In Tm3+ the temperature dependence of nonradiative relaxation charges is challenging through the existence of s