Photo-acoustic spectroscopy and quantum efficiency of Yb3+ doped alumino silicate glasses

In this contribution, we analyze the effect of several preparation methods of Yb3+ doped alumino silicate glasses on their quantum efficiency by using photo-acoustic measurements in comparison to standard measurement methods including the determination via the fluorescence lifetime and an integratin...

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Veröffentlicht in:Journal of applied physics 2015-09, Vol.118 (10)
Hauptverfasser: Kuhn, Stefan, Tiegel, Mirko, Herrmann, Andreas, Rüssel, Christian, Engel, Sebastian, Wenisch, Christoph, Gräf, Stephan, Müller, Frank A., Körner, Jörg, Seifert, Reinhard, Yue, Fangxin, Klöpfel, Diethardt, Hein, Joachim, Kaluza, Malte C.
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container_issue 10
container_start_page
container_title Journal of applied physics
container_volume 118
creator Kuhn, Stefan
Tiegel, Mirko
Herrmann, Andreas
Rüssel, Christian
Engel, Sebastian
Wenisch, Christoph
Gräf, Stephan
Müller, Frank A.
Körner, Jörg
Seifert, Reinhard
Yue, Fangxin
Klöpfel, Diethardt
Hein, Joachim
Kaluza, Malte C.
description In this contribution, we analyze the effect of several preparation methods of Yb3+ doped alumino silicate glasses on their quantum efficiency by using photo-acoustic measurements in comparison to standard measurement methods including the determination via the fluorescence lifetime and an integrating sphere setup. The preparation methods focused on decreasing the OH concentration by means of fluorine-substitution and/or applying dry melting atmospheres, which led to an increase in the measured fluorescence lifetime. However, it was found that the influence of these methods on radiative properties such as the measured fluorescence lifetime alone does not per se give exact information about the actual quantum efficiency of the sample. The determination of the quantum efficiency by means of fluorescence lifetime shows inaccuracies when refractive index changing elements such as fluorine are incorporated into the glass. Since fluorine not only eliminates OH from the glass but also increases the “intrinsic” radiative fluorescence lifetime, which is needed to calculate the quantum efficiency, it is difficult to separate lifetime quenching from purely radiative effects. The approach used in this contribution offers a possibility to disentangle radiative from non-radiative properties which is not possible by using fluorescence lifetime measurements alone and allows an accurate determination of the quantum efficiency of a given sample. The comparative determination by an integrating sphere setup leads to the well-known problem of reabsorption which embodies itself in the measurement of too low quantum efficiencies, especially for samples with small quantum efficiencies.
doi_str_mv 10.1063/1.4929819
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source AIP Journals Complete; Alma/SFX Local Collection
subjects Applied physics
Computing time
Efficiency
Fluorescence
Fluorine
Glass
Measurement methods
Quantum efficiency
Refractivity
title Photo-acoustic spectroscopy and quantum efficiency of Yb3+ doped alumino silicate glasses
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