In this paper, we numerically investigate the fluorescence decay of Tm-doped tellurite glasses with different dopant concentrations. The aim is to find a set of data that allows the prediction of material performance over a wide range of doping concentrations. Among the available data, a deep investigation of the reverse cross-relaxation process (F-3(4),F-3(4), -> H-3(6),H-3(4)) was not yet available. The numerical simulation indicates that the reverse cross-relaxation process parameter can be calculated by fitting the slow decaying H-3(4) fluorescence tails emitted when the pump level is almost depopulated. We also show that the floor of the H-3(4) decay curve is indeed related to a second exponential constant, half the F-3(4) lifetime, kicking in once the H-3(4) level depopulates. By properly fitting the whole set of decay curves for all samples, the proposed value for the reverse cross-relaxation process is 0.03 times the cross-relaxation parameter. We also comment on the measurement accuracy and best set-up. Excellent agreement was found between the simulated and experimental data, indicating the validity of the approach. This paper therefore proposes a set of parameters validated by fitting experimental fluorescence decay curves of both the H-3(4) and F-3(4) levels. To the best of our knowledge, this is the first time a numerical simulation has been able to predict the fluorescence behavior of glasses with doping levels ranging from 0.36 mol% to 10 mol%. We also show that appropriate calculations of the reverse cross-relaxation parameter may have a significant effect on the simulation of laser and amplifier devices. (C) 2017 Optical Society of America

Determination of reverse cross-relaxation process constant in Tm-doped glass by H-3(4) fluorescence decay tail fitting / Albalawi, A; Varas, S; Chiasera, A; Gebavi, H; Albalawi, W; Blanc, W; Balda, R; Lukowiak, A; Ferrari, M; Taccheo, S. - In: OPTICAL MATERIALS EXPRESS. - ISSN 2159-3930. - 7:10(2017), pp. 3760-3768. [10.1364/OME.7.003760]

Determination of reverse cross-relaxation process constant in Tm-doped glass by H-3(4) fluorescence decay tail fitting

Chiasera A;
2017

Abstract

In this paper, we numerically investigate the fluorescence decay of Tm-doped tellurite glasses with different dopant concentrations. The aim is to find a set of data that allows the prediction of material performance over a wide range of doping concentrations. Among the available data, a deep investigation of the reverse cross-relaxation process (F-3(4),F-3(4), -> H-3(6),H-3(4)) was not yet available. The numerical simulation indicates that the reverse cross-relaxation process parameter can be calculated by fitting the slow decaying H-3(4) fluorescence tails emitted when the pump level is almost depopulated. We also show that the floor of the H-3(4) decay curve is indeed related to a second exponential constant, half the F-3(4) lifetime, kicking in once the H-3(4) level depopulates. By properly fitting the whole set of decay curves for all samples, the proposed value for the reverse cross-relaxation process is 0.03 times the cross-relaxation parameter. We also comment on the measurement accuracy and best set-up. Excellent agreement was found between the simulated and experimental data, indicating the validity of the approach. This paper therefore proposes a set of parameters validated by fitting experimental fluorescence decay curves of both the H-3(4) and F-3(4) levels. To the best of our knowledge, this is the first time a numerical simulation has been able to predict the fluorescence behavior of glasses with doping levels ranging from 0.36 mol% to 10 mol%. We also show that appropriate calculations of the reverse cross-relaxation parameter may have a significant effect on the simulation of laser and amplifier devices. (C) 2017 Optical Society of America
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Albalawi, A; Varas, S; Chiasera, A; Gebavi, H; Albalawi, W; Blanc, W; Balda, R; Lukowiak, A; Ferrari, M; Taccheo, S
Determination of reverse cross-relaxation process constant in Tm-doped glass by H-3(4) fluorescence decay tail fitting / Albalawi, A; Varas, S; Chiasera, A; Gebavi, H; Albalawi, W; Blanc, W; Balda, R; Lukowiak, A; Ferrari, M; Taccheo, S. - In: OPTICAL MATERIALS EXPRESS. - ISSN 2159-3930. - 7:10(2017), pp. 3760-3768. [10.1364/OME.7.003760]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/342834
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