The nonradiative transition costs follow the method WNR = W (0) exp(-alphap), where p is the amount of phonons matching the Electrical power gap. The nonradiative changeover costs of Er3+ show temperature dependence in line with the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative relaxation charges is https://er-yb-yab-crystal41728.blogproducer.com/40225171/a-review-of-er-yb-yab-crystal