NOT KNOWN FACTUAL STATEMENTS ABOUT ER:YB:YAB CRYSTAL

The nonradiative changeover premiums Keep to the formula WNR = W (0) exp(-alphap), wherever p is the number of phonons matching the Vitality hole. The nonradiative transition charges of Er3+ show temperature dependence in step with the multiphonon peace theory. In Tm3+ the temperature dependence of nonradiative rest premiums is difficult because of