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In this paper, lead borate glasses singly, doubly and triply doped with rare earth ions were investigated using optical spectroscopy. Luminescence spectra of rare earths were detected under various excitation wavelengths. The main green luminescence band related to 5D4 → 7F5 transition of Tb3+ is observed under excitation of Dy3+. The main red emission band due to 5D0 → 7F2 transition of Eu3+ is well...
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