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DC Field | Value | Language |
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dc.contributor.author | Librantz, A. F. H. | - |
dc.contributor.author | Gomes, L. | - |
dc.contributor.author | Pairier, G. | - |
dc.contributor.author | Ribeiro, Sidney José Lima | - |
dc.contributor.author | Messaddeq, Younes | - |
dc.date.accessioned | 2014-05-20T15:31:52Z | - |
dc.date.accessioned | 2016-10-25T18:07:52Z | - |
dc.date.available | 2014-05-20T15:31:52Z | - |
dc.date.available | 2016-10-25T18:07:52Z | - |
dc.date.issued | 2008-01-01 | - |
dc.identifier | http://dx.doi.org/10.1016/j.jlumin.2007.05.010 | - |
dc.identifier.citation | Journal of Luminescence. Amsterdam: Elsevier B.V., v. 128, n. 1, p. 51-59, 2008. | - |
dc.identifier.issn | 0022-2313 | - |
dc.identifier.uri | http://hdl.handle.net/11449/40899 | - |
dc.identifier.uri | http://acervodigital.unesp.br/handle/11449/40899 | - |
dc.description.abstract | The mechanism involved in the Tm(3+)((3)F(4)) -> Tb(3+)((7)F(0,1,2)) energy transfer as a function of the Tb concentration was investigated in Tm:Tb-doped germanate (GLKZ) glass. The experimental transfer rate was determined from the best fit of the (3)F(4) luminescence decay due to the Tm -> Tb energy transfer using the Burshtein model. The result showed that the 1700 nm emission from (3)F(4) can be completely quenched by 0.8 mol% of Tb(3+). As a consequence, the (7)F(3) state of Tb(3+) interacts with the (3)H(4) upper excited state of TM(3+) slighting decreasing its population. The effective amplification coefficient beta(cm(-1)) that depends on the population density difference Delta n = n((3)H(4))-n((3)F(4)) involved in the optical transition of Tm(3+) (S-band) was calculated by solving the rate equations of the system for continuous pumping with laser at 792 nm, using the Runge-Kutta numerical method including terms of fourth order. The population density inversion An as a function of Tb(3+) concentration was calculated by computational simulation for three pumping intensities, 0.2, 2.2 and 4.4 kWcm(-2). These calculations were performed using the experimental Tm -> Tb transfer rates and the optical constants of the Tm (0.1 mol%) system. It was demonstrated that 0.2 mol% of Tb(3+) propitiates best population density inversion of Tin(3+) maximizing the amplification coefficient of Tm-doped (0.1 mol%) GLKZ glass when operating as laser intensity amplification at 1.47 mu m. (C) 2007 Elsevier B.V. All rights reserved. | en |
dc.format.extent | 51-59 | - |
dc.language.iso | eng | - |
dc.publisher | Elsevier B.V. | - |
dc.source | Web of Science | - |
dc.subject | germanate glasses | en |
dc.subject | Rare earth ions | en |
dc.subject | Optical absorption and laser induced luminescence | en |
dc.subject | Non-radiative energy transfer | en |
dc.subject | Population inversion | en |
dc.subject | CW laser pumping and rate equations | en |
dc.subject | Tm based optical amplifier properties for 1470 nm | en |
dc.title | Tm and Tm-Tb-doped germanate glasses for S-band amplifiers | en |
dc.type | outro | - |
dc.contributor.institution | Instituto de Pesquisas Energéticas e Nucleares (IPEN) | - |
dc.contributor.institution | Universidade Estadual Paulista (UNESP) | - |
dc.description.affiliation | IPEN CNEN SP, Ctr Lasers & Applicacoes, BR-05508900 São Paulo, Brazil | - |
dc.description.affiliation | Univ Estadual Paulista, Inst Quim Araraquara, Lab Mat Fotonicos, São Paulo, Brazil | - |
dc.description.affiliationUnesp | Univ Estadual Paulista, Inst Quim Araraquara, Lab Mat Fotonicos, São Paulo, Brazil | - |
dc.identifier.doi | 10.1016/j.jlumin.2007.05.010 | - |
dc.identifier.wos | WOS:000250280600009 | - |
dc.rights.accessRights | Acesso restrito | - |
dc.relation.ispartof | Journal of Luminescence | - |
Appears in Collections: | Artigos, TCCs, Teses e Dissertações da Unesp |
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