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Attenuation/time relation for OH formation in optical fibres exposed to H2

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2 Author(s)
Plessner, K.W. ; BICC Research & Engineering Limited, London, UK ; Stannard-Powell, S.J.

The increase in attenuation due to POH and GeOH formation, when fibres are exposed to hydrogen, has been found to follow a log (time) relation. Results are given for fibres with different phosphorus content. A possible explanation for the log t behaviour is discussed and, using the relationship, a prediction of long-term attenuation rise is made. The rise thus predicted is very small for current low-phosphorus fibres.

Published in:

Electronics Letters  (Volume:20 ,  Issue: 6 )