LITTLE KNOWN FACTS ABOUT ER:YB:YAB CRYSTAL.

The nonradiative transition charges follow the method WNR = W (0) exp(-alphap), exactly where p is the quantity of phonons matching the Vitality hole. The nonradiative transition charges of Er3+ exhibit temperature dependence according to the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative relaxation costs is complica