Journal
JOURNAL OF LUMINESCENCE
Volume 156, Issue -, Pages 116-123Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2014.07.023
Keywords
Tellurite glass; Optical properties; Broadband emission
Categories
Funding
- Brazilian agency FAPESP [2009/08978-4, 2011/21293-0]
- Brazilian agency CNPq
- Brazilian agency INOF/ CEPOF (Instituto Nacional de Optica e Fotonica / Centro de Pesquisa em Optica e Fotonica, Sao Paulo, Brazil)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [11/21293-0] Funding Source: FAPESP
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The impact of different sodium concentrations on the thermal properties and near-infrared emission at 1540 nm of Er3+-doped tellurite glasses was investigated. The glasses were characterized by UV-visible-near-infrared absorption spectroscopy, emission spectroscopy, Raman spectroscopy, refractive index measurements, and lifetime estimates. A theoretical analysis of the prepared samples was performed with the Judd-Ofelt parameters, radiative transition probability, quantum yield, and radiative lifetime. The glasses presented a large calculated emission cross-section at around 1537 nm (8.4 x 10(-21) cm(2)) and a good quantum yield (93%). The spectroscopic quality factors (Omega(4)/Omega(6)) obtained for the samples showed good agreement with the emission spectrum and bandwidth in the near-infrared region. The advantageous spectroscopic characteristics, together with good thermal stability, indicate that the glasses have potential applications as 1540 nm waveguides. (C) 2014 Elsevier B.V. All rights reserved.
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