NOT KNOWN FACTUAL STATEMENTS ABOUT ER:YB:YAB CRYSTAL

The nonradiative transition rates Keep to the formulation WNR = W (0) exp(-alphap), in which p is the number of phonons matching the Electrical power hole. The nonradiative transition premiums of Er3+ show temperature dependence per the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative peace rates is intricate via the exi