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Effect of Yb3+ concentration on optical properties of Yb:CaF2 transparent ceramics

Abstract : In Yb:CaF2, the coordination of Yb3+ in the CaF2 lattice determines the spectroscopic properties that make Yb:CaF2 a good candidate for high power laser applications. In this work, we measure the optical absorption, emission, and fluorescence lifetime of 0.1, 1, 5, and 10 at% Yb:CaF2 ceramics to determine whether Yb3+ substitutes as hexamer clusters giving rise to the tenability and long fluorescent lifetime observed in Yb:CaF2 single crystals. Absorption and emission spectra show that the concentration of Yb3+ present in hexamer clusters, as opposed to isolated ions, increases with increasing Yb3+ content. Fluorescence lifetime also increases with increasing Yb3+ content. Laser testing on a 1 at% Yb:CaF2 transparent ceramic demonstrates that these materials are viable laser gain media.
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https://hal-iogs.archives-ouvertes.fr/hal-00756835
Contributor : Sandrine Ricaud <>
Submitted on : Friday, November 23, 2012 - 6:32:21 PM
Last modification on : Wednesday, September 16, 2020 - 5:42:44 PM

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Sandrine Ricaud, Andreas Lyberis, Adam Stevenson, Akiko Suganuma, Frédéric Druon, et al.. Effect of Yb3+ concentration on optical properties of Yb:CaF2 transparent ceramics. Optical Materials, Elsevier, 2012, 34 (6), pp.965-968. ⟨10.1016/j.optmat.2011.05.036⟩. ⟨hal-00756835⟩

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