A REVIEW OF ER:YB:YAB CRYSTAL

The nonradiative changeover costs Stick to the formula WNR = W (0) exp(-alphap), where by p is the amount of phonons matching the Electrical power gap. The nonradiative transition premiums of Er3+ show temperature dependence per the multiphonon rest principle. In Tm3+ the temperature dependence of nonradiative leisure prices is intricate by the exi