resumo
Different concentrations (0.1, 0.5, 1.0 and 2.0 mol%) of Er3+-doped lead telluroborate glasses were prepared by conventional melt quenching method. Up on 514.5 nm laser excitation, the near infrared luminescence due to the I-4(13/2)-> I-4(15/2) transition was analyzed. The absorption and emission spectra were used to determine the different spectroscopic parameters by means of the Judd-Ofelt and the McCumber theories. The obtained Judd-Ofelt intensity parameters were used to obtain the radiative transition probability, fluorescence branching ratio and radiative lifetime of the I-4(13/2) emission state. The effect of Er3+ concentration on the emission intensity of I-4(13/2)-> I-4(15/2) transition was discussed. The Stark-level energies of I-4(13/2) excited and I-4(15/2) ground states were evaluated using both the absorption and emission measurements. The wavelength dependent gain coefficient, G(lambda) of I-4(13/2)-> I-4(15/2) transition of Er3+ ion was determined using the absorption and emission cross-sections. The suitability of this glass as a host for Er3+-doped broad-band amplifiers and its advantage over other glasses were discussed. (C) 2013 Elsevier B.V. All rights reserved.
palavras-chave
RARE-EARTH IONS; ER3+-DOPED TELLURITE GLASS; BISMUTH-BORATE GLASSES; SPECTROSCOPIC PROPERTIES; OPTICAL-ABSORPTION; PHOSPHATE-GLASSES; EMISSION PROPERTIES; THERMAL-STABILITY; AMPLIFIERS; FLUORESCENCE
categoria
Optics
autores
Kumar, MVV; Gopal, KR; Reddy, RR; Reddy, GVL; Jamalaiah, BC
nossos autores
Bungala Chinna Jamalaiah
Bolseiro de pós-DoutoramentoGrupos
agradecimentos
One of the authors Dr. B.C. Jamalaiah would like to thank the Fundacao para a Ciencia e a Tecnologia (FCT), Ministerio da Educacao e Ciencia, PORTUGAL for supporting him as a Post-Doctoral Researcher wide Ref. No. SFRH/BPD/76581/2011.