THE BASIC PRINCIPLES OF ER:YB:YAB CRYSTAL

The nonradiative transition premiums Stick to the system WNR = W (0) exp(-alphap), where p is the quantity of phonons matching the Power gap. The nonradiative transition premiums of Er3+ exhibit temperature dependence in keeping with the multiphonon relaxation principle. In Tm3+ the temperature dependence of nonradiative peace rates is intricate vi