POSSIBLE WAYS OF RELAXATIONS FOR EXCITED STATES OF RARE EARTH IONS IN AMORPHOUS MEDIA

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Abstract
The various mechanisms of relaxation of rare earths in glasses are outlined. Examples are given for radiative transfer as a means of increasing pumping efficiencies. Nonradiative relaxation of rare earths in oxide and fluoride glasses follow an exponential law when two glass former phonons are subtracted. Cross-relaxations are calculated for Pr(III), Ho(III) and Nd(III)

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