LITTLE KNOWN FACTS ABOUT ER:YB:YAB CRYSTAL.

The nonradiative changeover rates Adhere to the system WNR = W (0) exp(-alphap), where p is the volume of phonons matching the Power hole. The nonradiative changeover charges of Er3+ exhibit temperature dependence per the multiphonon leisure idea. In Tm3+ the temperature dependence of nonradiative rest premiums is intricate via the existence of sel