A REVIEW OF ER:YB:YAB CRYSTAL

The nonradiative transition fees Keep to the formula WNR = W (0) exp(-alphap), where by p is the amount of phonons matching the Power hole. The nonradiative changeover rates of Er3+ exhibit temperature dependence according to the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative relaxation charges is complicated with th