Effects in the population inversion of H-3(4) level in Tin, Tm-Tb and Tm-Eu doped germanate glasses for amplifiers applications

Autor(es)

Librantz, A. F. H. ; Gomes, L. ; Pairier, G. ; Ribeiro, S. J. L. ; Messaddeq, Y. ; Sennaroglu, A ; Fujimoto, JG ; Terry, JAC

• Tipo de documento: Artigo Científico
• Fonte: MEDICAL IMAGING 2007: PACS AND IMAGING INFORMATICS; v. 6190, p. 9-pg., 2006-01-01.

Resumo

The population inversion of the Tm3+ in GLKZ glass involved in the 1470 nm emission (H-3(4) -> F-3(4)) as a function of Tb (or Eu) concentration was calculated by computational simulation for a CW laser pumping at 792 mn. These calculations were performed using the experimental Tm -> Tb an Tm -> Eu transfer rates and the spectroscopic parameters of the Tm (0.1 mol %) system. The result shows that 0.2 mol % (Tb3+) and 0.4 mol % of Eu3+ ions propitiate best population inversion of Tm3+ (0.1 mol %) maximizing the amplification coefficient of germanate (GLKZ) glass when operating as laser intensity amplification at 1470 mn. Besides the effective deactivation of the F-3(4) level, the presence of Tb3+ or Eu3+ ions introduce a depopulation of the H-3(4) emitting level by means of a cross relaxation process with Tm3+ ions. In spite of this, the whole effect is verified to be benefic for using Tm-doped GLKZ glass codoped with Tb-3+ or Eu3+ as a suitable material for confectioning optical amplifiers that operates in the S-band for telecommunication. (AU)

• Processo FAPESP: 00/10986-0 - Estudo de geração de radiação ultravioleta pela excitação multifotônica de íons de Nd(3+) e Er(3+) em cristais fluoretos
• Beneficiário: Laercio Gomes
• Modalidade de apoio: Auxílio à Pesquisa - Regular