Abstract
New type of fluorophosphate glasses with different Tm3+/Ho3+ doping concentrations have been prepared. From the measured fluorescence spectra, strong emission near 2 μm is demonstrated in the samples. Based on the absorption spectra, the Judd–Ofelt parameters and radiative properties were calculated and compared with those of other glass hosts. Then for our prepared Tm3+/Ho3+ codoped fluorophosphate glass, the higher predicted spontaneous transition probability (76.54 s−1) along with the larger calculated emission cross-section (6.15×10−21 cm2) gives evidence of intense 2 μm fluorescence. Besides, it is found that the optimum doping concentration is 4 mol% Tm3+/1 mol% Ho3+ for the strongest 2 μm emission in our prepared samples.
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Tian, Y., Zhang, L.Y., Xu, R.R. et al. 2 μm emission properties in Tm3+/Ho3+ codoped fluorophosphate glasses. Appl. Phys. B 101, 861–867 (2010). https://doi.org/10.1007/s00340-010-4142-3
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DOI: https://doi.org/10.1007/s00340-010-4142-3