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Lifetime quenching in Yb doped fibres

By R. Paschotta, J. Nilsson, P.R. Barber, J.E. Caplen, A.C. Tropper and D.C. Hanna


We have discovered that in ytterbium-doped silica fibres the excited state lifetime of a fraction of the Yb ions can be quenched to a very small value, leading to a strong unbleachable loss. This unexpected behaviour seems to be caused by some, yet unidentified, impurity or structural defect. It is of considerable relevance for various Yb doped lasers and-amplifiers including Er:Yb codoped fibres as used in telecommunication amplifiers although it should also be emphasized that fibres can be produced that are free from the quenching effect

Topics: TK, QC
Year: 1997
OAI identifier: oai:eprints.soton.ac.uk:78060
Provided by: e-Prints Soton

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