Pumping dynamics in Yb:Er phosphate glasses

Abstract
Transient changes of erbium ion level populations in Yb:Er:phosphate glass caused by flashlamp or Nd:glass laser excitation were measured. Dependence of laser pumping efficiency on laser pulse duration was studied for two samples with different Er3+ ion concentrations. Diffusion bottleneck due to low erbium concentration is shown to influence considerably the Yb-Er sensitization process.

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