Abstract
Spectral investigation of europium-doped flourophosphate glass shows photosensitivity in the range of 244 nm to 351 nm. Holographic investigations of the dependence of the achievable refractive-index changes indicate a strong impact of the doping concentration. The refractive-index changes increase with europium concentrations up to 1.0×1020 Eu/cm3; for higher doping levels the effect becomes smaller. Based on these results, refractive-index changes in excess of 10-3 for optimized material and holographic recording are predicted. About 23% of the initially recorded holographic grating decay in a double-exponential way with time constants of 7 h and 240 h, but the other 77% of the primary refractive-index changes are persistent. The spatial resolution of this material is better than 1 μm.
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42.40.Lx; 42.40.Pa; 42.70.Ln
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Wengler, M., Schreder, B., Soergel, E. et al. Spectral photosensitivity and holographic performance of europium-doped fluorophosphate glass. Appl Phys B 79, 597–601 (2004). https://doi.org/10.1007/s00340-004-1566-7
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DOI: https://doi.org/10.1007/s00340-004-1566-7