3 March 2011 Last advances in Yb3+ doped CaF2 ceramics synthesis
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Abstract
One at% Yb:CaF2 transparent ceramics for high power lasers are obtained by vacuum sintering and hot pressing nanoparticles synthesized through a soft chemistry route. The residual optical losses of these ceramics are as low as 0.09 cm-1 (corresponding to an in-line transmittance of 96.7%) at 1200 nm. Densification during sintering is limited by large voids, but pressure assisted densification after sintering results in high optical quality transparent ceramics. Absorption spectra are similar to Yb:CaF2 single crystal, and the fluorescence lifetime was measured to be 2 ms in the wavelength 1010 to 1050 nm range. The 1 at% Yb:CaF2 transparent ceramics successfully produced laser oscillation at 1031 nm when placed in an Omega-type laser cavity under 970 nm diode laser pumping.
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Michel Mortier, Michel Mortier, Andréas Lyberis, Andréas Lyberis, Akiko Saganuma, Akiko Saganuma, Adam Stevenson, Adam Stevenson, Daniel Vivien, Daniel Vivien, Patrick Gredin, Patrick Gredin, Gilles Patriarche, Gilles Patriarche, } "Last advances in Yb3+ doped CaF2 ceramics synthesis", Proc. SPIE 7912, Solid State Lasers XX: Technology and Devices, 79121R (3 March 2011); doi: 10.1117/12.879461; https://doi.org/10.1117/12.879461
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