NOT KNOWN DETAILS ABOUT ER:YB:YAB CRYSTAL

The nonradiative changeover costs Adhere to the system WNR = W (0) exp(-alphap), exactly where p is the number of phonons matching the Power hole. The nonradiative changeover costs of Er3+ show temperature dependence according to the multiphonon rest concept. In Tm3+ the temperature dependence of nonradiative relaxation rates is complicated because