LITTLE KNOWN FACTS ABOUT ER:YB:YAB CRYSTAL.

The nonradiative changeover charges Keep to the formula WNR = W (0) exp(-alphap), wherever p is the quantity of phonons matching the Strength gap. The nonradiative changeover fees of Er3+ show temperature dependence in keeping with the multiphonon peace principle. In Tm3+ the temperature dependence of nonradiative peace rates is sophisticated throu