Evaluation of parasitic upconversion mechanisms in Er/sup 3+/-doped silica-glass fibers by analysis of fluorescence at 980 nm

Nilsson, Johan; Blixt, P.; Jaskorzyńska, B.; Babonas, J.

doi:10.1109/50.372427

Cited by 60 publications

(31 citation statements)

References 11 publications

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“…Very efficient cooperative upconversion can occur when two ͑or more͒ ions form a pair ͑or cluster͒, resulting in almost immediate interaction of the ions once both of them are excited. This is referred to as pair-induced quenching ͑PIQ͒, [12][13][14] and effectively limits the maximum degree of inversion attainable in the material. Upconversion can also occur through absorption of a photon by an excited Er 3ϩ ion, promoting it to a higher-energy state ͓see Fig.…”

Section: Introductionmentioning

confidence: 99%

Upconversion in Er-implanted Al2O3 waveguides

Hoven

Snoeks

Polman

et al. 1996

Journal of Applied Physics

168

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Hoven, van den, G.N.; Snoeks, E.; Polman, A.; Dam, van, C.; Uffelen, van, J.W.M.; Smit, M.K. Published in:Journal of Applied Physics Published: 01/01/1996 Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA):Hoven, van den, G. N., Snoeks, E., Polman, A., Dam, van, C., Uffelen, van, J. W. M., & Smit, M. K. (1996). Upconversion in Er-implanted Al2O3 waveguides. Journal of Applied Physics, 79(3), 1258-1266. General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. When pumped with a 1.48 m laser diode, Er-implanted Al 2 O 3 ridge waveguides emit a broad spectrum consisting of several distinct peaks having wavelengths ranging from the midinfrared ͑1.53 m͒ to the visible ͑520 nm͒. In order to explain these observations, three different upconversion mechanisms are considered: cooperative upconversion, excited state absorption, and pair-induced quenching. It is found that for samples with a high Er concentration ͑1.4 at. %͒, cooperative upconversion completely dominates the deexcitation of the Er 3ϩ ions. For a much lower concentration ͑0.12 at. %͒, the influence of cooperative upconversion is strongly reduced, and another upconversion effect becomes apparent: excited state absorption. These conclusions are based on measurements of the luminescence emission versus pump intensity, and also on measured luminescence decay curves. The upconversion coefficient is found to be ͑4Ϯ1͒ϫ10 Ϫ18 cm 3 /s; the excited state absorption cross section is ͑0.9Ϯ0.3͒ϫ10 Ϫ21 cm 2 . It is shown that in spite of these upconversion effects, a high fraction of the Er 3ϩ can be excite...

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Section: Introductionmentioning

confidence: 99%

Upconversion in Er-implanted Al2O3 waveguides

Hoven

Snoeks

Polman

et al. 1996

Journal of Applied Physics

168

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“…Table II shows the fitted, experimentally measured, and assumed parameters with the corresponding literature. References [36]- [43] are additional references for the active medium parameters. …”

Section: Fitting Parametersmentioning

confidence: 99%

Experimentally verified modeling of erbium-ytterbium co-doped DFB fiber lasers

Yelen

Hickey²,

Zervas

2005

J. Lightwave Technol.

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Abstract-For the first time, the simulation results of fiber distributed feedback (DFB) lasers are compared against experimental data in this paper. The pump source, active medium, and grating are all modeled and simulated to predict actual laser characteristics. Simple characterization methods are illustrated for the measurement of model parameters. Large loss at the pump wavelength is observed, attributed to the lifetime quenching of Yb ions, and included in the model as a critical parameter. DFB lasers with two different apodization profiles successfully simulated with the same set of model parameters.

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“…The quenching of Er ions through energy-transfer upconversion is usually divided into a contribution from homogeneously distributed Er ions and a contribution from clustered Er ions [4]- [7]. The formation of clusters depends on the fabrication process and the use of co-dopants and may thus to some degree be avoided [8], [9].…”

Section: Monte Carlo Simulations Of Homogeneous Upconversion In Erbiumentioning

confidence: 99%

Monte Carlo simulations of homogeneous upconversion in erbium-doped silica glasses

Philipsen

Bjarklev²

1997

IEEE J. Quantum Electron.

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Abstract-Quenching of Er3+ ions by homogeneous energytransfer upconversion in high-concentration erbium-doped silica glasses has been theoretically investigated. The results indicate that at Er 3+ concentrations of 1.0-2.0110 26 m 03 or below, the kinetic limit of strong migration is not reached, and hence the widely accepted quadratic upconversion model is not generally valid. Nevertheless, the results offer an explanation of the experimental observations of quadratic upconversion. Furthermore, it has been shown that at a given population inversion, the quenching rate depends on the rate of exchange of the excited Er 3+ ions by emission and absorption.

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Evaluation of parasitic upconversion mechanisms in Er/sup 3+/-doped silica-glass fibers by analysis of fluorescence at 980 nm

Cited by 60 publications

References 11 publications

Upconversion in Er-implanted Al2O3 waveguides

Upconversion in Er-implanted Al2O3 waveguides

Experimentally verified modeling of erbium-ytterbium co-doped DFB fiber lasers

Monte Carlo simulations of homogeneous upconversion in erbium-doped silica glasses

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