Spectroscopic properties of Nd3+-doped tungsten-tellurite glasses

• Autor(a) principal: Costa, F. B. [UNESP]
• Data de Publicação: 2015
• Outros Autores: Yukimitu, K. [UNESP], Nunes, L. A.O., Figueiredo, M. S., Andrade, L. H.C., Lima, S. M., Moraes, J. C.S. [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/j.jpcs.2015.09.009; http://hdl.handle.net/11449/168089
• topic: Glasses; Luminescence; Optical materials; Optical properties

In this work, we investigate the spectroscopy properties of neodymium doped tungsten-tellurite glasses prepared in ambient and O2-rich atmospheres. A conversion of TeO4 to TeO3 units was caused by the addition of Nd3+ into the glass, which was confirmed by absorption spectra and by Judd-Ofelt parameter behavior. The relaxation of the 4F3/2 level is dominated by radiative decay and cross-relaxation between Nd3+ and Nd3+ ions. The energy transfer from Nd3+ to the hydroxyl group is negligible when compared to the cross-relaxation. The luminescence quantum efficiency values of the 4F3/2 level decreases as the Nd3+ concentration increases, independently if determined by the Judd-Ofelt method or by the thermal lens technique. The observed reduction in the IR absorption associated to OH groups was not effective to improve the luminescence quantum efficiency.