Spectroscopic properties ot Tm3+: TeO2-PbF2 glasses


Sennaroglu A. , Kabalci I., KURT A., DEMIRBAS U., OZEN G.

JOURNAL OF LUMINESCENCE, vol.116, pp.79-86, 2006 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Article
  • Volume: 116
  • Publication Date: 2006
  • Doi Number: 10.1016/j.jlulmin.2005.03.006
  • Title of Journal : JOURNAL OF LUMINESCENCE
  • Page Numbers: pp.79-86

Abstract

We investigated the near-infrared luminescence characteristics as a function of glass composition and Tm3+ ion concentration in a new type of Tm3+-doped tellurite glass: (1-x)TeO2-(x)PbF2. In the experiments, absorption measurements were first performed to determine the spontaneous emission probabilities and the radiative lifetimes for the 4f-4f transitions of the Tm3+ ions by using the Judd-Ofelt theory. Luminescence measurements show that with increasing thulium concentration, the strength of the 1470-nm band decreases with respect to that at 1800nm due to cross relaxation. Emission cross sections were further determined as a function of host composition by using the luminescence data. For a fixed thulium concentration of 1 mol %, samples with x = 20 mol % had the highest emission cross sections at 1470 and 1800 nm. Finally, lifetime measurements showed that the luminescence quantum efficiencies of the 1470- and 1800-nm transitions were maximum for host compositions with x = 20 and 22 mol%, respectively. (c) 2005 Elsevier B.V. All rights reserved.