A comprehensive phononics of phonon assisted energy transfer in the Yb3+ aided upconversion luminescence of Tm3+ and Ho3+ in solids

Debnath, Radhaballabh; Bose, Saptasree

doi:10.1016/j.jlumin.2014.12.045

Cited by 6 publications

(2 citation statements)

References 20 publications

(31 reference statements)

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“…A more rigorous calculation of the PAET efficiency requires knowledge of the absorption cross-section of the Ce 3+ 2 F 7/2 → 2 F 7/2 transition (~2200 cm −1 ), which is impossible to obtain because the intrinsic phonon cut-off edge of the samples lies at shorter wavelength (~3000 cm −1 ). Incidentally, the PAET has also been found a very successful means to improve the lasing efficiency of Yb 3+ /Ho 3+ and Yb 3+ /Tm 3+ pairs in solids29. We have failed to measure the lifetimes of 4 I 11/2 level of Er 3+ before and after codoping of CeO 2 because the 1000 nm and 2.7 μm emissions from 4 I 11/2 level were too weak to be recorded, thus we are not able to deduce the PAET efficiency between Er 3+ and Ce 3+ .…”

Section: Discussionmentioning

confidence: 99%

Ce3+/Yb3+/Er3+ triply doped bismuth borosilicate glass: a potential fiber material for broadband near-infrared fiber amplifiers

Chu

Ren

Zhang

et al. 2016

Sci Rep

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Erbium doped bismuth borosilicate (BBS) glasses, possessing the broadest 1.55 μm near infrared (NIR) emission band among oxide glasses, stand out as excellent fiber material for optical fiber amplifiers. In this work, we demonstrate that both broadened and enhanced NIR emission of Er3+ can be obtained by sensibly combining the effects such as mixed glass former effect, phonon-assisted energy transfer (PAET) and de-excitation effect induced by codopant. Specially, by codoping CeO2 in a controlled manner, it leads to not only much improved optical quality of the glasses, enhanced NIR emission, but also significantly suppressed energy transfer up-conversion (ETU) luminescence which is detrimental to the NIR emission. Cerium incorporated in the glasses exists overwhelmingly as the trivalent oxidation state Ce3+ and its effects on the luminescence properties of Er3+ are discussed. Judd-Ofelt analysis is used to evaluate gain amplification of the glasses. The result indicates that Ce3+/Yb3+/Er3+ triply doped BBS glasses are promising candidate for erbium doped fiber amplifiers. The strategy described here can be readily extended to other rare-earth ions (REs) to improve the performance of REs doped fiber lasers and amplifiers.

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Section: Discussionmentioning

confidence: 99%

Ce3+/Yb3+/Er3+ triply doped bismuth borosilicate glass: a potential fiber material for broadband near-infrared fiber amplifiers

Chu

Ren

Zhang

et al. 2016

Sci Rep

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“…To date, most of the effort has been spent on Nd 3+ -and Er 3+ -doped tellurite glass systems [11][12][13][14][15][16] and there are relatively fewer studies conducted on the Tm 3+ -doped tellurite glasses [17][18][19][20][21][22][23][24][25]. Recently, lasing and mode-locked operation from bulk thulium-doped tellurite glasses were reported [20,[26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Comparative Spectroscopic Investigation of Tm3+:Tellurite Glasses for 2-μm Lasing Applications

et al. 2018

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Abstract:We performed a comparative spectroscopic analysis on three novel Tm 3+ :tellurite-based glasses with the following compositions Tm 2 O 3 :TeO 2 -ZnO (TeZnTm), Tm 2 O 3 :TeO 2 -Nb 2 O 5 (TeNbTm), and Tm 3+ :TeO 2 -K 2 O-Nb 2 O 5 (TeNbKTm), primarily for 2-µm laser applications. Tellurite glasses were prepared at different doping concentrations in order to investigate the effect of Tm 3+ ion concentration as well as host composition on the stimulated emission cross sections and the luminescence quantum efficiencies. By performing Judd-Ofelt analysis, we determined the average radiative lifetimes of the 3 H 4 level to be 2.55 ± 0.07 ms, 2.76 ± 0.03 ms and 2.57 ± 0.20 ms for the TeZnTm, TeNbTm and TeNbKTm samples, respectively. We clearly observed the effect of the cross-relaxation, which becomes significant at higher Tm 2 O 3 concentrations, leading to the quenching of 1460-nm emission and enhancement of 1860-nm emission. Furthermore, with increasing Tm 2 O 3 concentrations, we observed a decrease in the fluorescence lifetimes as a result of the onset of non-radiative decay. For the 3 H 4 level, the highest obtained quantum efficiency was 32% for the samples with the lowest Tm 2 O 3 ion concentration. For the 1860-nm emission band, the average emission cross section was determined to measure around 6.33 ± 0.34 × 10 −21 cm 2 , revealing the potential of thulium-doped tellurite gain media for 2-µm laser applications in bulk and fiber configurations.

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Advances in Functional Luminescent Materials and Phosphors

Debnath

2016

Advanced Magnetic and Optical Materials

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A comprehensive phononics of phonon assisted energy transfer in the Yb3+ aided upconversion luminescence of Tm3+ and Ho3+ in solids

Cited by 6 publications

References 20 publications

Ce3+/Yb3+/Er3+ triply doped bismuth borosilicate glass: a potential fiber material for broadband near-infrared fiber amplifiers

Ce3+/Yb3+/Er3+ triply doped bismuth borosilicate glass: a potential fiber material for broadband near-infrared fiber amplifiers

Comparative Spectroscopic Investigation of Tm3+:Tellurite Glasses for 2-μm Lasing Applications

Advances in Functional Luminescent Materials and Phosphors

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