Effect of Erbium-Ytterbium in the sensitivity of the sensors of temperature based on optic fibers of Er^3+-Yb^3+: BaF_2 -P_20_5

We report experimental results on temperature (interval 25-300°C) dependence of luminescence decay time of fluorophosphate fiber-preforms with different concentrations of Er3+-Yb3+: We find that increasing Ytterbium-concentration in preforms, increases sensitivity to changes in temperature.