Poole, S.B., Payne, D.N., Fermann, M.E., Laming, R.I. and Mears, R.J.
Characterisation of fibres containing rare-earth ions.
In, JOERS Advanced Fibre Measurements Symposium National Physical Laboratory, London,
A recent enhancement of the MCVD process has permitted the fabrication of long lengths of both mono- and multi-mode optical fibres containing low concentrations (1dB/m) whilst maintaining the low-losses (<1 dB/km) inherent in optical fibres at wavelengths of interest for communications. Such properties make the fibres suitable for use as either optical fibre lasers or amplifiers. Moreover, distributed temperature sensors can be constructed using changes in either the absorption band strengths or fluorescence lifetimes
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