| Autor: |
Plotskii, A.Yu., Kurkov, Andrei S., Yashkov, M.Yu., Bubnov, M.M., Likhachev, M.E., Sysolyatin, A.A., Gur'yanov, A.N., Dianov, Evgenii M. |
| Zdroj: |
Quantum Electronics; July 2005, Vol. 35 Issue: 6 p559-562, 4p |
| Abstrakt: |
The relative concentration of erbium ions undergoing nonradiative relaxation from the metastable to the ground level is measured in aluminosilicate glass fibres doped with erbium ions at concentration between 3×1018 and 1020 cm-3. The dependence of the fraction of such ions on the Er3+ concentration is determined for fibres containing different amounts of aluminium oxide in a core. It is shown that the fraction of erbium ions not involved in amplification substantially decreases with increasing the Al2O3 concentration. It is found that clustering leads to a considerable decrease in the gain in heavily Er3+-doped active fibres. The dependence of the quantum efficiency of a fibre amplifier on the erbium ion concentration is obtained based on the measurements performed. This dependence can be used for optimising the parameters of erbium-doped fibre amplifiers. |
| Databáze: |
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| Externí odkaz: |
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