A REVIEW OF ER:YB:YAB CRYSTAL

The nonradiative changeover premiums Stick to the components WNR = W (0) exp(-alphap), wherever p is the amount of phonons matching the Strength gap. The nonradiative changeover rates of Er3+ exhibit temperature dependence consistent with the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative relaxation charges is sophis