A REVIEW OF ER:YB:YAB CRYSTAL

The nonradiative transition costs follow the formula WNR = W (0) exp(-alphap), the place p is the number of phonons matching the Power gap. The nonradiative transition rates of Er3+ exhibit temperature dependence per the multiphonon relaxation concept. In Tm3+ the temperature dependence of nonradiative leisure fees is challenging from the existence