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Intense 2.7-μm emissions are obtained from Er~(3+)/Nd~(3+) co-doped tellurite glass samples under the 808-nm laser diode excitation.According to the absorption spectra,Judd-Ofelt parameters and radiative transition probabilities are calculated and analyzed using the Judd-Ofelt theory.The spectroscopic properties and energy transfer mechanism between Er~(3+) and Nd~(3+) are analyzed.The effects of OH~- content on the spectroscopic properties of Er~(3+)/Nd~(3+) co-doped samples are discussed.The obtained results indicate that Er~(3+)/Nd~(3+) co-doped tellurite glass can significantly develop optical properties of 2.7-μm emission,if OH~- exoups can be effectivelv eliminated.
Intense 2.7-μm emissions are obtained from Er ~ (3 +) / Nd ~ (3+) co-doped tellurite glass samples under the 808-nm laser diode excitation. Based on absorption spectra, Judd-Ofelt parameters and radiative transition probabilities are calculated and analyzed using the Judd-Ofelt theory. The spectroscopic properties and energy transfer mechanism between Er ~ (3+) and Nd ~ (3+) are analyzed. The effects of OH ~ - on the spectroscopic properties of Er ~ ( 3+) / Nd ~ (3+) co-doped samples are discussed. The obtained results indicate that Er ~ (3 +) / Nd ~ (3+) co-doped tellurite glass can significantly develop optical properties of 2.7- , if OH ~ - exoups can be effectivelv eliminated.