Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 2, 2007
|
|
---|---|---|
Article Number | 07027 | |
Number of page(s) | 6 | |
DOI | https://doi.org/10.2971/jeos.2007.07027 | |
Published online | 20 August 2007 |
Regular papers
Excitation back transfer in a statistical model for upconversion in Er-doped fibres
1
Optics Research Group, Waterford Institute of Technology, Cork Road, Waterford, Ireland
2
Department of Microelectronics and Applied Physics, Royal Institute of Technology, Electrum 229, SE-164 40 Kista, Sweden
* ssergeyev@wit.ie
** sergey.sergeyev@gmail.com
Received:
9
July
2007
We report a new analytical method to evaluate the accuracy of a statistical model of the migration assisted upconversion in Er-doped fibres. Unlike the mean-field approach to the excitation back transfer which was used in a previous statistical model, we use a new approximation accounting for the variance of population of the first excited level. Such an approach presents more realistic physical description of the excitation – emission processes in heavily-doped Er-based fibres. Implementing these results, we find that the accuracy of upconversion rate calculations is within 13% if the concentration of erbium ions is smaller than the critical one.
Key words: erbium / fibre amplifier / upconversion
© The Author(s) 2007. All rights reserved.
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