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Eu3+-doped bismuth borate based glasses with various contents of WO3 were fabricated by melt quenching. Optical properties of Eu3+ ions in these ternary systems and their dependence on the WO3 content were investigated: absorption and emission spectra were studied as the WO3 molar ratio was adjusted from 1 to 5 mol %. The Judd-Ofelt parameters were calculated from the emission spectra and expressed...
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