Abstract
Highly transparent Nd‐doped calcium fluoride (Nd: CaF2) ceramics with different Nd‐doped concentrations were fabricated by hot‐pressed method using Nd: CaF2 nanopowders synthesized by coprecipitation method. SEM observations indicated that the average grain size of nanopowders was about 16–30 nm and the average grain size of the ceramics was between 200 nm and 1 μm. The grain boundaries of the ceramics were clean and no pores or impurities were detected. For 2‐mm‐thickness sample, the transmittance of the as‐fabricated 5 at.% Nd: CaF2 ceramic at 1200 nm was about 85%. The absorption coefficient and emission intensity of the Nd: CaF2 ceramics were measured and discussed. From the Nd: CaF2 ceramics fluorescent spectra and the decay curves, it was found that the fluorescent quenching effect became more evident with the increase in the Nd3+ ions‐doped concentration.
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