The nonradiative changeover costs follow the formula WNR = W (0) exp(-alphap), where p is the number of phonons matching the energy hole. The nonradiative changeover rates of Er3+ exhibit temperature dependence according to the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative peace costs is difficult with https://erybyabcrystal20730.worldblogged.com/40890767/little-known-facts-about-er-yb-yab-crystal