NOT KNOWN DETAILS ABOUT ER:YB:YAB CRYSTAL

The nonradiative transition rates follow the formula WNR = W (0) exp(-alphap), where by p is the quantity of phonons matching the Power gap. The nonradiative transition prices of Er3+ exhibit temperature dependence according to the multiphonon rest idea. In Tm3+ the temperature dependence of nonradiative peace fees is complex through the existence