Effects in the population inversion of 3H4 level in Tm, Tm-Tb, and Tm-Eu doped germanate glasses for amplifiers applications

A. F. H. Librantz; L. Gomes; G. Pairier; S. J. L. Ribeiro; Y. Messaddeq

doi:10.1117/12.684771

17 April 2006 Effects in the population inversion of ³H₄ level in Tm, Tm-Tb, and Tm-Eu doped germanate glasses for amplifiers applications

A. F. H. Librantz, L. Gomes, G. Pairier, S. J. L. Ribeiro, Y. Messaddeq

Author Affiliations +

Proceedings Volume 6190, Solid State Lasers and Amplifiers II; 61901G (2006) https://doi.org/10.1117/12.684771
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

The population inversion of the Tm³⁺ in GLKZ glass involved in the 1470 nm emission (³H₄-> ³F₄) as a function of Tb (or Eu) concentration was calculated by computational simulation for a CW laser pumping at 792 nm. 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 nm. Besides the effective deactivation of the ³F₄ level, the presence of Tb³⁺ or Eu³⁺ ions introduce a depopulation of the ³H₄ 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 Tb³⁺ or Eu³⁺ as a suitable material for confectioning optical amplifiers that operates in the S-band for telecommunication. PACS code: 78.50, 78.55, 71.55

Citation Download Citation

A. F. H. Librantz, L. Gomes, G. Pairier, S. J. L. Ribeiro, and Y. Messaddeq "Effects in the population inversion of ³H₄ level in Tm, Tm-Tb, and Tm-Eu doped germanate glasses for amplifiers applications", Proc. SPIE 6190, Solid State Lasers and Amplifiers II, 61901G (17 April 2006); https://doi.org/10.1117/12.684771

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